Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dsl_dataset.c @ 6643:3a34b0dbb107
6625086 changing cachefile doesn't remove old cache on last user
6633599 need a mechanism to import faulted pools
6646102 hot spares are not activated when opening a pool
6646106 ZFS DE is overly complicated
6646195 ZFS DE leaks pool handles
6646618 want dataset GUIDs as a property in libzfs
6662441 L2ARC FMA support
6687745 zdb -U doesn't work with anything but pool names
6687750 ::spa_vdevs should print out cache devices
6687753 cache devices should support offline/online
6687766 ZFS should post a sysevent when config changes
6688366 bad indentation for 'casesensitivity' property in 'zfs get' help
6689223 spa_create() can leave namespace lock held if property validation fails
6690884 setting zfs_no_write_throttle panics system
6691266 zpool_read_label() needs to use pread64()
6694185 nv_priv_init() doesn't bzero structure completely
6694186 ses_plugin_dlclose is backwards
6697754 ses2 plugin crash when setting invalid property
| author | eschrock |
|---|---|
| date | Wed, 14 May 2008 15:15:08 -0700 |
| parents | 66aef5f20377 |
| children | 47572a2f5e73 |
| rev | line source |
|---|---|
| 789 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
| 1544 | 5 * Common Development and Distribution License (the "License"). |
| 6 * You may not use this file except in compliance with the License. | |
| 789 | 7 * |
| 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 9 * or http://www.opensolaris.org/os/licensing. | |
| 10 * See the License for the specific language governing permissions | |
| 11 * and limitations under the License. | |
| 12 * | |
| 13 * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 * If applicable, add the following below this CDDL HEADER, with the | |
| 16 * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 * | |
| 19 * CDDL HEADER END | |
| 20 */ | |
| 21 /* | |
|
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22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
| 789 | 23 * Use is subject to license terms. |
| 24 */ | |
| 25 | |
| 26 #pragma ident "%Z%%M% %I% %E% SMI" | |
| 27 | |
| 28 #include <sys/dmu_objset.h> | |
| 29 #include <sys/dsl_dataset.h> | |
| 30 #include <sys/dsl_dir.h> | |
| 2082 | 31 #include <sys/dsl_prop.h> |
| 2199 | 32 #include <sys/dsl_synctask.h> |
| 789 | 33 #include <sys/dmu_traverse.h> |
| 34 #include <sys/dmu_tx.h> | |
| 35 #include <sys/arc.h> | |
| 36 #include <sys/zio.h> | |
| 37 #include <sys/zap.h> | |
| 38 #include <sys/unique.h> | |
| 39 #include <sys/zfs_context.h> | |
| 4007 | 40 #include <sys/zfs_ioctl.h> |
| 4543 | 41 #include <sys/spa.h> |
| 42 #include <sys/sunddi.h> | |
| 789 | 43 |
| 2199 | 44 static dsl_checkfunc_t dsl_dataset_destroy_begin_check; |
| 45 static dsl_syncfunc_t dsl_dataset_destroy_begin_sync; | |
| 46 static dsl_checkfunc_t dsl_dataset_rollback_check; | |
| 47 static dsl_syncfunc_t dsl_dataset_rollback_sync; | |
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48 static dsl_syncfunc_t dsl_dataset_set_reservation_sync; |
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49 |
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50 #define DS_REF_MAX (1ULL << 62) |
| 789 | 51 |
| 52 #define DSL_DEADLIST_BLOCKSIZE SPA_MAXBLOCKSIZE | |
| 53 | |
| 54 /* | |
| 55 * We use weighted reference counts to express the various forms of exclusion | |
| 56 * between different open modes. A STANDARD open is 1 point, an EXCLUSIVE open | |
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57 * is DS_REF_MAX, and a PRIMARY open is little more than half of an EXCLUSIVE. |
| 789 | 58 * This makes the exclusion logic simple: the total refcnt for all opens cannot |
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59 * exceed DS_REF_MAX. For example, EXCLUSIVE opens are exclusive because their |
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60 * weight (DS_REF_MAX) consumes the entire refcnt space. PRIMARY opens consume |
| 789 | 61 * just over half of the refcnt space, so there can't be more than one, but it |
| 62 * can peacefully coexist with any number of STANDARD opens. | |
| 63 */ | |
| 64 static uint64_t ds_refcnt_weight[DS_MODE_LEVELS] = { | |
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65 0, /* DS_MODE_NONE - invalid */ |
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66 1, /* DS_MODE_STANDARD - unlimited number */ |
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67 (DS_REF_MAX >> 1) + 1, /* DS_MODE_PRIMARY - only one of these */ |
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68 DS_REF_MAX /* DS_MODE_EXCLUSIVE - no other opens */ |
| 789 | 69 }; |
| 70 | |
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71 /* |
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72 * Figure out how much of this delta should be propogated to the dsl_dir |
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73 * layer. If there's a refreservation, that space has already been |
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74 * partially accounted for in our ancestors. |
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75 */ |
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76 static int64_t |
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77 parent_delta(dsl_dataset_t *ds, int64_t delta) |
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78 { |
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79 uint64_t old_bytes, new_bytes; |
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80 |
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81 if (ds->ds_reserved == 0) |
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82 return (delta); |
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83 |
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84 old_bytes = MAX(ds->ds_phys->ds_unique_bytes, ds->ds_reserved); |
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85 new_bytes = MAX(ds->ds_phys->ds_unique_bytes + delta, ds->ds_reserved); |
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86 |
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87 ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); |
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88 return (new_bytes - old_bytes); |
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89 } |
| 789 | 90 |
| 91 void | |
| 92 dsl_dataset_block_born(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 93 { | |
| 2082 | 94 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
| 789 | 95 int compressed = BP_GET_PSIZE(bp); |
| 96 int uncompressed = BP_GET_UCSIZE(bp); | |
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97 int64_t delta; |
| 789 | 98 |
| 99 dprintf_bp(bp, "born, ds=%p\n", ds); | |
| 100 | |
| 101 ASSERT(dmu_tx_is_syncing(tx)); | |
| 102 /* It could have been compressed away to nothing */ | |
| 103 if (BP_IS_HOLE(bp)) | |
| 104 return; | |
| 105 ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
| 106 ASSERT3U(BP_GET_TYPE(bp), <, DMU_OT_NUMTYPES); | |
| 107 if (ds == NULL) { | |
| 108 /* | |
| 109 * Account for the meta-objset space in its placeholder | |
| 110 * dsl_dir. | |
| 111 */ | |
| 112 ASSERT3U(compressed, ==, uncompressed); /* it's all metadata */ | |
| 113 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
| 114 used, compressed, uncompressed, tx); | |
| 115 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
| 116 return; | |
| 117 } | |
| 118 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 119 mutex_enter(&ds->ds_lock); | |
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120 delta = parent_delta(ds, used); |
| 789 | 121 ds->ds_phys->ds_used_bytes += used; |
| 122 ds->ds_phys->ds_compressed_bytes += compressed; | |
| 123 ds->ds_phys->ds_uncompressed_bytes += uncompressed; | |
| 124 ds->ds_phys->ds_unique_bytes += used; | |
| 125 mutex_exit(&ds->ds_lock); | |
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126 dsl_dir_diduse_space(ds->ds_dir, delta, compressed, uncompressed, tx); |
| 789 | 127 } |
| 128 | |
| 129 void | |
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130 dsl_dataset_block_kill(dsl_dataset_t *ds, blkptr_t *bp, zio_t *pio, |
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131 dmu_tx_t *tx) |
| 789 | 132 { |
| 2082 | 133 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
| 789 | 134 int compressed = BP_GET_PSIZE(bp); |
| 135 int uncompressed = BP_GET_UCSIZE(bp); | |
| 136 | |
| 137 ASSERT(dmu_tx_is_syncing(tx)); | |
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138 /* No block pointer => nothing to free */ |
| 789 | 139 if (BP_IS_HOLE(bp)) |
| 140 return; | |
| 141 | |
| 142 ASSERT(used > 0); | |
| 143 if (ds == NULL) { | |
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144 int err; |
| 789 | 145 /* |
| 146 * Account for the meta-objset space in its placeholder | |
| 147 * dataset. | |
| 148 */ | |
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149 err = arc_free(pio, tx->tx_pool->dp_spa, |
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150 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
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151 ASSERT(err == 0); |
| 789 | 152 |
| 153 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
| 154 -used, -compressed, -uncompressed, tx); | |
| 155 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
| 156 return; | |
| 157 } | |
| 158 ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
| 159 | |
| 160 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 161 | |
| 162 if (bp->blk_birth > ds->ds_phys->ds_prev_snap_txg) { | |
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163 int err; |
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164 int64_t delta; |
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165 |
| 789 | 166 dprintf_bp(bp, "freeing: %s", ""); |
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167 err = arc_free(pio, tx->tx_pool->dp_spa, |
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168 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
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169 ASSERT(err == 0); |
| 789 | 170 |
| 171 mutex_enter(&ds->ds_lock); | |
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172 ASSERT(ds->ds_phys->ds_unique_bytes >= used || |
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173 !DS_UNIQUE_IS_ACCURATE(ds)); |
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174 delta = parent_delta(ds, -used); |
| 789 | 175 ds->ds_phys->ds_unique_bytes -= used; |
| 176 mutex_exit(&ds->ds_lock); | |
| 177 dsl_dir_diduse_space(ds->ds_dir, | |
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178 delta, -compressed, -uncompressed, tx); |
| 789 | 179 } else { |
| 180 dprintf_bp(bp, "putting on dead list: %s", ""); | |
| 1544 | 181 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, bp, tx)); |
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182 ASSERT3U(ds->ds_prev->ds_object, ==, |
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183 ds->ds_phys->ds_prev_snap_obj); |
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184 ASSERT(ds->ds_prev->ds_phys->ds_num_children > 0); |
| 789 | 185 /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
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186 if (ds->ds_prev->ds_phys->ds_next_snap_obj == |
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187 ds->ds_object && bp->blk_birth > |
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188 ds->ds_prev->ds_phys->ds_prev_snap_txg) { |
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189 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
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190 mutex_enter(&ds->ds_prev->ds_lock); |
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191 ds->ds_prev->ds_phys->ds_unique_bytes += used; |
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192 mutex_exit(&ds->ds_prev->ds_lock); |
| 789 | 193 } |
| 194 } | |
| 195 mutex_enter(&ds->ds_lock); | |
| 196 ASSERT3U(ds->ds_phys->ds_used_bytes, >=, used); | |
| 197 ds->ds_phys->ds_used_bytes -= used; | |
| 198 ASSERT3U(ds->ds_phys->ds_compressed_bytes, >=, compressed); | |
| 199 ds->ds_phys->ds_compressed_bytes -= compressed; | |
| 200 ASSERT3U(ds->ds_phys->ds_uncompressed_bytes, >=, uncompressed); | |
| 201 ds->ds_phys->ds_uncompressed_bytes -= uncompressed; | |
| 202 mutex_exit(&ds->ds_lock); | |
| 203 } | |
| 204 | |
| 1544 | 205 uint64_t |
| 206 dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) | |
| 789 | 207 { |
| 2885 | 208 uint64_t trysnap = 0; |
| 209 | |
| 789 | 210 if (ds == NULL) |
| 1544 | 211 return (0); |
| 789 | 212 /* |
| 213 * The snapshot creation could fail, but that would cause an | |
| 214 * incorrect FALSE return, which would only result in an | |
| 215 * overestimation of the amount of space that an operation would | |
| 216 * consume, which is OK. | |
| 217 * | |
| 218 * There's also a small window where we could miss a pending | |
| 219 * snapshot, because we could set the sync task in the quiescing | |
| 220 * phase. So this should only be used as a guess. | |
| 221 */ | |
| 2885 | 222 if (ds->ds_trysnap_txg > |
| 223 spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) | |
| 224 trysnap = ds->ds_trysnap_txg; | |
| 225 return (MAX(ds->ds_phys->ds_prev_snap_txg, trysnap)); | |
| 1544 | 226 } |
| 227 | |
| 228 int | |
| 229 dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth) | |
| 230 { | |
| 231 return (blk_birth > dsl_dataset_prev_snap_txg(ds)); | |
| 789 | 232 } |
| 233 | |
| 234 /* ARGSUSED */ | |
| 235 static void | |
| 236 dsl_dataset_evict(dmu_buf_t *db, void *dsv) | |
| 237 { | |
| 238 dsl_dataset_t *ds = dsv; | |
| 239 | |
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240 /* open_refcount == DS_REF_MAX when deleting */ |
| 789 | 241 ASSERT(ds->ds_open_refcount == 0 || |
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242 ds->ds_open_refcount == DS_REF_MAX); |
| 789 | 243 |
| 244 dprintf_ds(ds, "evicting %s\n", ""); | |
| 245 | |
| 4787 | 246 unique_remove(ds->ds_fsid_guid); |
| 789 | 247 |
| 248 if (ds->ds_user_ptr != NULL) | |
| 249 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 250 | |
| 251 if (ds->ds_prev) { | |
| 252 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
| 253 ds->ds_prev = NULL; | |
| 254 } | |
| 255 | |
| 256 bplist_close(&ds->ds_deadlist); | |
| 257 dsl_dir_close(ds->ds_dir, ds); | |
| 258 | |
| 4787 | 259 ASSERT(!list_link_active(&ds->ds_synced_link)); |
| 789 | 260 |
| 2856 | 261 mutex_destroy(&ds->ds_lock); |
| 4787 | 262 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 263 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
| 264 | |
| 789 | 265 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 266 } | |
| 267 | |
| 1544 | 268 static int |
| 789 | 269 dsl_dataset_get_snapname(dsl_dataset_t *ds) |
| 270 { | |
| 271 dsl_dataset_phys_t *headphys; | |
| 272 int err; | |
| 273 dmu_buf_t *headdbuf; | |
| 274 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 275 objset_t *mos = dp->dp_meta_objset; | |
| 276 | |
| 277 if (ds->ds_snapname[0]) | |
| 1544 | 278 return (0); |
| 789 | 279 if (ds->ds_phys->ds_next_snap_obj == 0) |
| 1544 | 280 return (0); |
| 789 | 281 |
| 1544 | 282 err = dmu_bonus_hold(mos, ds->ds_dir->dd_phys->dd_head_dataset_obj, |
| 283 FTAG, &headdbuf); | |
| 284 if (err) | |
| 285 return (err); | |
| 789 | 286 headphys = headdbuf->db_data; |
| 287 err = zap_value_search(dp->dp_meta_objset, | |
| 4577 | 288 headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); |
| 1544 | 289 dmu_buf_rele(headdbuf, FTAG); |
| 290 return (err); | |
| 789 | 291 } |
| 292 | |
|
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293 static int |
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294 dsl_dataset_snap_lookup(objset_t *os, uint64_t flags, |
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295 uint64_t snapnames_zapobj, const char *name, uint64_t *value) |
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296 { |
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297 matchtype_t mt; |
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298 int err; |
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299 |
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300 if (flags & DS_FLAG_CI_DATASET) |
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301 mt = MT_FIRST; |
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302 else |
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303 mt = MT_EXACT; |
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304 |
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305 err = zap_lookup_norm(os, snapnames_zapobj, name, 8, 1, |
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306 value, mt, NULL, 0, NULL); |
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307 if (err == ENOTSUP && mt == MT_FIRST) |
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308 err = zap_lookup(os, snapnames_zapobj, name, 8, 1, value); |
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309 return (err); |
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310 } |
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311 |
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312 static int |
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313 dsl_dataset_snap_remove(objset_t *os, uint64_t flags, |
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314 uint64_t snapnames_zapobj, char *name, dmu_tx_t *tx) |
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315 { |
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316 matchtype_t mt; |
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317 int err; |
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318 |
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319 if (flags & DS_FLAG_CI_DATASET) |
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320 mt = MT_FIRST; |
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321 else |
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322 mt = MT_EXACT; |
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323 |
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324 err = zap_remove_norm(os, snapnames_zapobj, name, mt, tx); |
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325 if (err == ENOTSUP && mt == MT_FIRST) |
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326 err = zap_remove(os, snapnames_zapobj, name, tx); |
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327 return (err); |
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328 } |
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329 |
| 1544 | 330 int |
| 789 | 331 dsl_dataset_open_obj(dsl_pool_t *dp, uint64_t dsobj, const char *snapname, |
| 1544 | 332 int mode, void *tag, dsl_dataset_t **dsp) |
| 789 | 333 { |
| 334 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
| 335 objset_t *mos = dp->dp_meta_objset; | |
| 336 dmu_buf_t *dbuf; | |
| 337 dsl_dataset_t *ds; | |
| 1544 | 338 int err; |
| 789 | 339 |
| 340 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || | |
| 341 dsl_pool_sync_context(dp)); | |
| 342 | |
| 1544 | 343 err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); |
| 344 if (err) | |
| 345 return (err); | |
| 789 | 346 ds = dmu_buf_get_user(dbuf); |
| 347 if (ds == NULL) { | |
| 348 dsl_dataset_t *winner; | |
| 349 | |
| 350 ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); | |
| 351 ds->ds_dbuf = dbuf; | |
| 352 ds->ds_object = dsobj; | |
| 353 ds->ds_phys = dbuf->db_data; | |
| 354 | |
| 2856 | 355 mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); |
| 4787 | 356 mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); |
| 2856 | 357 mutex_init(&ds->ds_deadlist.bpl_lock, NULL, MUTEX_DEFAULT, |
| 358 NULL); | |
| 359 | |
| 1544 | 360 err = bplist_open(&ds->ds_deadlist, |
| 789 | 361 mos, ds->ds_phys->ds_deadlist_obj); |
| 1544 | 362 if (err == 0) { |
| 363 err = dsl_dir_open_obj(dp, | |
| 364 ds->ds_phys->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
| 365 } | |
| 366 if (err) { | |
| 367 /* | |
| 368 * we don't really need to close the blist if we | |
| 369 * just opened it. | |
| 370 */ | |
| 2856 | 371 mutex_destroy(&ds->ds_lock); |
| 4787 | 372 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 373 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
| 1544 | 374 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 375 dmu_buf_rele(dbuf, tag); | |
| 376 return (err); | |
| 377 } | |
| 789 | 378 |
| 379 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == dsobj) { | |
| 380 ds->ds_snapname[0] = '\0'; | |
| 381 if (ds->ds_phys->ds_prev_snap_obj) { | |
| 1544 | 382 err = dsl_dataset_open_obj(dp, |
| 789 | 383 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 1544 | 384 DS_MODE_NONE, ds, &ds->ds_prev); |
| 789 | 385 } |
| 386 } else { | |
| 387 if (snapname) { | |
| 388 #ifdef ZFS_DEBUG | |
| 389 dsl_dataset_phys_t *headphys; | |
| 1544 | 390 dmu_buf_t *headdbuf; |
| 391 err = dmu_bonus_hold(mos, | |
| 392 ds->ds_dir->dd_phys->dd_head_dataset_obj, | |
| 393 FTAG, &headdbuf); | |
| 394 if (err == 0) { | |
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395 uint64_t foundobj; |
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396 |
| 1544 | 397 headphys = headdbuf->db_data; |
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398 err = dsl_dataset_snap_lookup( |
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399 dp->dp_meta_objset, |
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400 headphys->ds_flags, |
| 1544 | 401 headphys->ds_snapnames_zapobj, |
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402 snapname, &foundobj); |
| 1544 | 403 ASSERT3U(foundobj, ==, dsobj); |
| 404 dmu_buf_rele(headdbuf, FTAG); | |
| 405 } | |
| 789 | 406 #endif |
| 407 (void) strcat(ds->ds_snapname, snapname); | |
| 408 } else if (zfs_flags & ZFS_DEBUG_SNAPNAMES) { | |
| 1544 | 409 err = dsl_dataset_get_snapname(ds); |
| 789 | 410 } |
| 411 } | |
| 412 | |
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413 if (!dsl_dataset_is_snapshot(ds)) { |
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414 /* |
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415 * In sync context, we're called with either no lock |
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416 * or with the write lock. If we're not syncing, |
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417 * we're always called with the read lock held. |
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418 */ |
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419 boolean_t need_lock = |
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420 !RW_WRITE_HELD(&dp->dp_config_rwlock) && |
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421 dsl_pool_sync_context(dp); |
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422 |
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423 if (need_lock) |
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424 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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425 |
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426 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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427 "refreservation", sizeof (uint64_t), 1, |
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428 &ds->ds_reserved, NULL); |
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429 if (err == 0) { |
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430 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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431 "refquota", sizeof (uint64_t), 1, |
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432 &ds->ds_quota, NULL); |
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433 } |
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434 |
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435 if (need_lock) |
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436 rw_exit(&dp->dp_config_rwlock); |
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437 } else { |
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438 ds->ds_reserved = ds->ds_quota = 0; |
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439 } |
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440 |
| 1544 | 441 if (err == 0) { |
| 442 winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys, | |
| 443 dsl_dataset_evict); | |
| 444 } | |
| 445 if (err || winner) { | |
| 789 | 446 bplist_close(&ds->ds_deadlist); |
| 447 if (ds->ds_prev) { | |
| 448 dsl_dataset_close(ds->ds_prev, | |
| 449 DS_MODE_NONE, ds); | |
| 450 } | |
| 451 dsl_dir_close(ds->ds_dir, ds); | |
| 2856 | 452 mutex_destroy(&ds->ds_lock); |
| 4787 | 453 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 454 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
| 789 | 455 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 1544 | 456 if (err) { |
| 457 dmu_buf_rele(dbuf, tag); | |
| 458 return (err); | |
| 459 } | |
| 789 | 460 ds = winner; |
| 461 } else { | |
| 4787 | 462 ds->ds_fsid_guid = |
| 789 | 463 unique_insert(ds->ds_phys->ds_fsid_guid); |
| 464 } | |
| 465 } | |
| 466 ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
| 467 ASSERT3P(ds->ds_phys, ==, dbuf->db_data); | |
| 468 | |
| 469 mutex_enter(&ds->ds_lock); | |
| 470 if ((DS_MODE_LEVEL(mode) == DS_MODE_PRIMARY && | |
| 2082 | 471 (ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) && |
| 472 !DS_MODE_IS_INCONSISTENT(mode)) || | |
|
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473 (ds->ds_open_refcount + weight > DS_REF_MAX)) { |
| 789 | 474 mutex_exit(&ds->ds_lock); |
| 475 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 1544 | 476 return (EBUSY); |
| 789 | 477 } |
| 478 ds->ds_open_refcount += weight; | |
| 479 mutex_exit(&ds->ds_lock); | |
| 480 | |
| 1544 | 481 *dsp = ds; |
| 482 return (0); | |
| 789 | 483 } |
| 484 | |
| 485 int | |
| 486 dsl_dataset_open_spa(spa_t *spa, const char *name, int mode, | |
| 487 void *tag, dsl_dataset_t **dsp) | |
| 488 { | |
| 489 dsl_dir_t *dd; | |
| 490 dsl_pool_t *dp; | |
| 491 const char *tail; | |
| 492 uint64_t obj; | |
| 493 dsl_dataset_t *ds = NULL; | |
| 494 int err = 0; | |
| 495 | |
| 1544 | 496 err = dsl_dir_open_spa(spa, name, FTAG, &dd, &tail); |
| 497 if (err) | |
| 498 return (err); | |
| 789 | 499 |
| 500 dp = dd->dd_pool; | |
| 501 obj = dd->dd_phys->dd_head_dataset_obj; | |
| 502 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 503 if (obj == 0) { | |
| 504 /* A dataset with no associated objset */ | |
| 505 err = ENOENT; | |
| 506 goto out; | |
| 507 } | |
| 508 | |
| 509 if (tail != NULL) { | |
| 510 objset_t *mos = dp->dp_meta_objset; | |
|
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511 uint64_t flags; |
| 789 | 512 |
| 1544 | 513 err = dsl_dataset_open_obj(dp, obj, NULL, |
| 514 DS_MODE_NONE, tag, &ds); | |
| 515 if (err) | |
| 516 goto out; | |
|
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517 flags = ds->ds_phys->ds_flags; |
| 789 | 518 obj = ds->ds_phys->ds_snapnames_zapobj; |
| 519 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 520 ds = NULL; | |
| 521 | |
| 522 if (tail[0] != '@') { | |
| 523 err = ENOENT; | |
| 524 goto out; | |
| 525 } | |
| 526 tail++; | |
| 527 | |
| 528 /* Look for a snapshot */ | |
| 529 if (!DS_MODE_IS_READONLY(mode)) { | |
| 530 err = EROFS; | |
| 531 goto out; | |
| 532 } | |
| 533 dprintf("looking for snapshot '%s'\n", tail); | |
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534 err = dsl_dataset_snap_lookup(mos, flags, obj, tail, &obj); |
| 789 | 535 if (err) |
| 536 goto out; | |
| 537 } | |
| 1544 | 538 err = dsl_dataset_open_obj(dp, obj, tail, mode, tag, &ds); |
| 789 | 539 |
| 540 out: | |
| 541 rw_exit(&dp->dp_config_rwlock); | |
| 542 dsl_dir_close(dd, FTAG); | |
| 543 | |
| 544 ASSERT3U((err == 0), ==, (ds != NULL)); | |
| 545 /* ASSERT(ds == NULL || strcmp(name, ds->ds_name) == 0); */ | |
| 546 | |
| 547 *dsp = ds; | |
| 548 return (err); | |
| 549 } | |
| 550 | |
| 551 int | |
| 552 dsl_dataset_open(const char *name, int mode, void *tag, dsl_dataset_t **dsp) | |
| 553 { | |
| 554 return (dsl_dataset_open_spa(NULL, name, mode, tag, dsp)); | |
| 555 } | |
| 556 | |
| 557 void | |
| 558 dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
| 559 { | |
| 560 if (ds == NULL) { | |
| 561 (void) strcpy(name, "mos"); | |
| 562 } else { | |
| 563 dsl_dir_name(ds->ds_dir, name); | |
| 1544 | 564 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 565 if (ds->ds_snapname[0]) { |
| 566 (void) strcat(name, "@"); | |
| 567 if (!MUTEX_HELD(&ds->ds_lock)) { | |
| 568 /* | |
| 569 * We use a "recursive" mutex so that we | |
| 570 * can call dprintf_ds() with ds_lock held. | |
| 571 */ | |
| 572 mutex_enter(&ds->ds_lock); | |
| 573 (void) strcat(name, ds->ds_snapname); | |
| 574 mutex_exit(&ds->ds_lock); | |
| 575 } else { | |
| 576 (void) strcat(name, ds->ds_snapname); | |
| 577 } | |
| 578 } | |
| 579 } | |
| 580 } | |
| 581 | |
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582 static int |
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583 dsl_dataset_namelen(dsl_dataset_t *ds) |
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584 { |
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585 int result; |
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586 |
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587 if (ds == NULL) { |
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588 result = 3; /* "mos" */ |
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589 } else { |
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590 result = dsl_dir_namelen(ds->ds_dir); |
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591 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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592 if (ds->ds_snapname[0]) { |
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593 ++result; /* adding one for the @-sign */ |
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594 if (!MUTEX_HELD(&ds->ds_lock)) { |
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595 /* see dsl_datset_name */ |
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596 mutex_enter(&ds->ds_lock); |
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597 result += strlen(ds->ds_snapname); |
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598 mutex_exit(&ds->ds_lock); |
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599 } else { |
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600 result += strlen(ds->ds_snapname); |
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601 } |
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602 } |
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603 } |
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604 |
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605 return (result); |
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606 } |
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607 |
| 789 | 608 void |
| 609 dsl_dataset_close(dsl_dataset_t *ds, int mode, void *tag) | |
| 610 { | |
| 611 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
| 612 mutex_enter(&ds->ds_lock); | |
| 613 ASSERT3U(ds->ds_open_refcount, >=, weight); | |
| 614 ds->ds_open_refcount -= weight; | |
| 615 mutex_exit(&ds->ds_lock); | |
| 616 | |
| 1544 | 617 dmu_buf_rele(ds->ds_dbuf, tag); |
| 789 | 618 } |
| 619 | |
| 620 void | |
| 5367 | 621 dsl_dataset_downgrade(dsl_dataset_t *ds, int oldmode, int newmode) |
| 622 { | |
| 623 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
| 624 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
| 625 mutex_enter(&ds->ds_lock); | |
| 626 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
| 627 ASSERT3U(oldweight, >=, newweight); | |
| 628 ds->ds_open_refcount -= oldweight; | |
| 629 ds->ds_open_refcount += newweight; | |
| 630 mutex_exit(&ds->ds_lock); | |
| 631 } | |
| 632 | |
| 633 boolean_t | |
| 634 dsl_dataset_tryupgrade(dsl_dataset_t *ds, int oldmode, int newmode) | |
| 635 { | |
| 636 boolean_t rv; | |
| 637 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
| 638 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
| 639 mutex_enter(&ds->ds_lock); | |
| 640 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
| 641 ASSERT3U(newweight, >=, oldweight); | |
| 642 if (ds->ds_open_refcount - oldweight + newweight > DS_REF_MAX) { | |
| 643 rv = B_FALSE; | |
| 644 } else { | |
| 645 ds->ds_open_refcount -= oldweight; | |
| 646 ds->ds_open_refcount += newweight; | |
| 647 rv = B_TRUE; | |
| 648 } | |
| 649 mutex_exit(&ds->ds_lock); | |
| 650 return (rv); | |
| 651 } | |
| 652 | |
| 653 void | |
| 789 | 654 dsl_dataset_create_root(dsl_pool_t *dp, uint64_t *ddobjp, dmu_tx_t *tx) |
| 655 { | |
| 656 objset_t *mos = dp->dp_meta_objset; | |
| 657 dmu_buf_t *dbuf; | |
| 658 dsl_dataset_phys_t *dsphys; | |
| 659 dsl_dataset_t *ds; | |
| 660 uint64_t dsobj; | |
| 661 dsl_dir_t *dd; | |
| 662 | |
| 663 dsl_dir_create_root(mos, ddobjp, tx); | |
| 1544 | 664 VERIFY(0 == dsl_dir_open_obj(dp, *ddobjp, NULL, FTAG, &dd)); |
| 789 | 665 |
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666 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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667 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 668 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 669 dmu_buf_will_dirty(dbuf, tx); |
| 670 dsphys = dbuf->db_data; | |
| 671 dsphys->ds_dir_obj = dd->dd_object; | |
| 672 dsphys->ds_fsid_guid = unique_create(); | |
| 673 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 674 sizeof (dsphys->ds_guid)); | |
| 675 dsphys->ds_snapnames_zapobj = | |
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676 zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, |
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677 DMU_OT_NONE, 0, tx); |
| 789 | 678 dsphys->ds_creation_time = gethrestime_sec(); |
| 679 dsphys->ds_creation_txg = tx->tx_txg; | |
| 680 dsphys->ds_deadlist_obj = | |
| 681 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
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682 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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683 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 1544 | 684 dmu_buf_rele(dbuf, FTAG); |
| 789 | 685 |
| 686 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 687 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 688 dsl_dir_close(dd, FTAG); | |
| 689 | |
| 1544 | 690 VERIFY(0 == |
| 691 dsl_dataset_open_obj(dp, dsobj, NULL, DS_MODE_NONE, FTAG, &ds)); | |
|
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692 (void) dmu_objset_create_impl(dp->dp_spa, ds, |
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693 &ds->ds_phys->ds_bp, DMU_OST_ZFS, tx); |
| 789 | 694 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 695 } | |
| 696 | |
| 2199 | 697 uint64_t |
|
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698 dsl_dataset_create_sync_impl(dsl_dir_t *dd, dsl_dataset_t *origin, |
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699 uint64_t flags, dmu_tx_t *tx) |
| 789 | 700 { |
| 5367 | 701 dsl_pool_t *dp = dd->dd_pool; |
| 789 | 702 dmu_buf_t *dbuf; |
| 703 dsl_dataset_phys_t *dsphys; | |
| 5367 | 704 uint64_t dsobj; |
| 789 | 705 objset_t *mos = dp->dp_meta_objset; |
| 706 | |
| 5367 | 707 ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
| 708 ASSERT(origin == NULL || origin->ds_phys->ds_num_children > 0); | |
| 789 | 709 ASSERT(dmu_tx_is_syncing(tx)); |
| 5367 | 710 ASSERT(dd->dd_phys->dd_head_dataset_obj == 0); |
| 789 | 711 |
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712 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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713 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 714 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 715 dmu_buf_will_dirty(dbuf, tx); |
| 716 dsphys = dbuf->db_data; | |
| 717 dsphys->ds_dir_obj = dd->dd_object; | |
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718 dsphys->ds_flags = flags; |
| 789 | 719 dsphys->ds_fsid_guid = unique_create(); |
| 720 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 721 sizeof (dsphys->ds_guid)); | |
| 722 dsphys->ds_snapnames_zapobj = | |
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723 zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, |
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724 DMU_OT_NONE, 0, tx); |
| 789 | 725 dsphys->ds_creation_time = gethrestime_sec(); |
| 726 dsphys->ds_creation_txg = tx->tx_txg; | |
| 727 dsphys->ds_deadlist_obj = | |
| 728 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
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729 |
| 5367 | 730 if (origin) { |
| 731 dsphys->ds_prev_snap_obj = origin->ds_object; | |
| 789 | 732 dsphys->ds_prev_snap_txg = |
| 5367 | 733 origin->ds_phys->ds_creation_txg; |
| 789 | 734 dsphys->ds_used_bytes = |
| 5367 | 735 origin->ds_phys->ds_used_bytes; |
| 789 | 736 dsphys->ds_compressed_bytes = |
| 5367 | 737 origin->ds_phys->ds_compressed_bytes; |
| 789 | 738 dsphys->ds_uncompressed_bytes = |
| 5367 | 739 origin->ds_phys->ds_uncompressed_bytes; |
| 740 dsphys->ds_bp = origin->ds_phys->ds_bp; | |
|
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741 dsphys->ds_flags |= origin->ds_phys->ds_flags; |
| 789 | 742 |
| 5367 | 743 dmu_buf_will_dirty(origin->ds_dbuf, tx); |
| 744 origin->ds_phys->ds_num_children++; | |
| 789 | 745 |
| 746 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 5367 | 747 dd->dd_phys->dd_origin_obj = origin->ds_object; |
| 789 | 748 } |
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749 |
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750 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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751 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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752 |
| 1544 | 753 dmu_buf_rele(dbuf, FTAG); |
| 789 | 754 |
| 755 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 756 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 5367 | 757 |
| 758 return (dsobj); | |
| 759 } | |
| 760 | |
| 761 uint64_t | |
|
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762 dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, |
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763 dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) |
| 5367 | 764 { |
| 765 dsl_pool_t *dp = pdd->dd_pool; | |
| 766 uint64_t dsobj, ddobj; | |
| 767 dsl_dir_t *dd; | |
| 768 | |
| 769 ASSERT(lastname[0] != '@'); | |
| 770 | |
| 771 ddobj = dsl_dir_create_sync(pdd, lastname, tx); | |
| 772 VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd)); | |
| 773 | |
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774 dsobj = dsl_dataset_create_sync_impl(dd, origin, flags, tx); |
| 5367 | 775 |
| 776 dsl_deleg_set_create_perms(dd, tx, cr); | |
| 777 | |
| 789 | 778 dsl_dir_close(dd, FTAG); |
| 779 | |
| 2199 | 780 return (dsobj); |
| 781 } | |
| 782 | |
| 783 struct destroyarg { | |
| 784 dsl_sync_task_group_t *dstg; | |
| 785 char *snapname; | |
| 786 char *failed; | |
| 787 }; | |
| 788 | |
| 789 static int | |
| 790 dsl_snapshot_destroy_one(char *name, void *arg) | |
| 791 { | |
| 792 struct destroyarg *da = arg; | |
| 793 dsl_dataset_t *ds; | |
| 794 char *cp; | |
| 795 int err; | |
| 796 | |
| 797 (void) strcat(name, "@"); | |
| 798 (void) strcat(name, da->snapname); | |
| 799 err = dsl_dataset_open(name, | |
| 800 DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, | |
| 4007 | 801 da->dstg, &ds); |
| 2199 | 802 cp = strchr(name, '@'); |
| 803 *cp = '\0'; | |
| 804 if (err == ENOENT) | |
| 805 return (0); | |
| 806 if (err) { | |
| 807 (void) strcpy(da->failed, name); | |
| 808 return (err); | |
| 809 } | |
| 810 | |
| 811 dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check, | |
| 4007 | 812 dsl_dataset_destroy_sync, ds, da->dstg, 0); |
| 789 | 813 return (0); |
| 814 } | |
| 815 | |
| 2199 | 816 /* |
| 817 * Destroy 'snapname' in all descendants of 'fsname'. | |
| 818 */ | |
| 819 #pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy | |
| 820 int | |
| 821 dsl_snapshots_destroy(char *fsname, char *snapname) | |
| 822 { | |
| 823 int err; | |
| 824 struct destroyarg da; | |
| 825 dsl_sync_task_t *dst; | |
| 826 spa_t *spa; | |
| 827 | |
|
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828 err = spa_open(fsname, &spa, FTAG); |
| 2199 | 829 if (err) |
| 830 return (err); | |
| 831 da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); | |
| 832 da.snapname = snapname; | |
| 833 da.failed = fsname; | |
| 834 | |
| 835 err = dmu_objset_find(fsname, | |
| 2417 | 836 dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN); |
| 2199 | 837 |
| 838 if (err == 0) | |
| 839 err = dsl_sync_task_group_wait(da.dstg); | |
| 840 | |
| 841 for (dst = list_head(&da.dstg->dstg_tasks); dst; | |
| 842 dst = list_next(&da.dstg->dstg_tasks, dst)) { | |
| 843 dsl_dataset_t *ds = dst->dst_arg1; | |
| 844 if (dst->dst_err) { | |
| 845 dsl_dataset_name(ds, fsname); | |
|
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846 *strchr(fsname, '@') = '\0'; |
| 2199 | 847 } |
| 848 /* | |
| 849 * If it was successful, destroy_sync would have | |
| 850 * closed the ds | |
| 851 */ | |
| 852 if (err) | |
| 4007 | 853 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, da.dstg); |
| 2199 | 854 } |
| 855 | |
| 856 dsl_sync_task_group_destroy(da.dstg); | |
| 857 spa_close(spa, FTAG); | |
| 858 return (err); | |
| 859 } | |
| 860 | |
| 5367 | 861 /* |
| 862 * ds must be opened EXCLUSIVE or PRIMARY. on return (whether | |
| 863 * successful or not), ds will be closed and caller can no longer | |
| 864 * dereference it. | |
| 865 */ | |
| 789 | 866 int |
| 5367 | 867 dsl_dataset_destroy(dsl_dataset_t *ds, void *tag) |
| 789 | 868 { |
| 869 int err; | |
| 2199 | 870 dsl_sync_task_group_t *dstg; |
| 871 objset_t *os; | |
| 789 | 872 dsl_dir_t *dd; |
| 2199 | 873 uint64_t obj; |
| 874 | |
| 5367 | 875 if (ds->ds_open_refcount != DS_REF_MAX) { |
| 876 if (dsl_dataset_tryupgrade(ds, DS_MODE_PRIMARY, | |
| 877 DS_MODE_EXCLUSIVE) == 0) { | |
| 878 dsl_dataset_close(ds, DS_MODE_PRIMARY, tag); | |
| 879 return (EBUSY); | |
| 880 } | |
| 881 } | |
| 882 | |
| 883 if (dsl_dataset_is_snapshot(ds)) { | |
| 2199 | 884 /* Destroying a snapshot is simpler */ |
| 885 err = dsl_sync_task_do(ds->ds_dir->dd_pool, | |
| 886 dsl_dataset_destroy_check, dsl_dataset_destroy_sync, | |
| 5367 | 887 ds, tag, 0); |
| 888 goto out; | |
| 2199 | 889 } |
| 890 | |
| 891 dd = ds->ds_dir; | |
| 789 | 892 |
| 2199 | 893 /* |
| 894 * Check for errors and mark this ds as inconsistent, in | |
| 895 * case we crash while freeing the objects. | |
| 896 */ | |
| 897 err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check, | |
| 898 dsl_dataset_destroy_begin_sync, ds, NULL, 0); | |
| 5367 | 899 if (err) |
| 900 goto out; | |
| 901 | |
| 902 err = dmu_objset_open_ds(ds, DMU_OST_ANY, &os); | |
| 903 if (err) | |
| 904 goto out; | |
| 2199 | 905 |
| 906 /* | |
| 907 * remove the objects in open context, so that we won't | |
| 908 * have too much to do in syncing context. | |
| 909 */ | |
|
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910 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, |
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911 ds->ds_phys->ds_prev_snap_txg)) { |
| 2199 | 912 dmu_tx_t *tx = dmu_tx_create(os); |
| 913 dmu_tx_hold_free(tx, obj, 0, DMU_OBJECT_END); | |
| 914 dmu_tx_hold_bonus(tx, obj); | |
| 915 err = dmu_tx_assign(tx, TXG_WAIT); | |
| 916 if (err) { | |
| 917 /* | |
| 918 * Perhaps there is not enough disk | |
| 919 * space. Just deal with it from | |
| 920 * dsl_dataset_destroy_sync(). | |
| 921 */ | |
| 922 dmu_tx_abort(tx); | |
| 923 continue; | |
| 924 } | |
| 925 VERIFY(0 == dmu_object_free(os, obj, tx)); | |
| 926 dmu_tx_commit(tx); | |
| 927 } | |
| 928 /* Make sure it's not dirty before we finish destroying it. */ | |
| 929 txg_wait_synced(dd->dd_pool, 0); | |
| 930 | |
| 931 dmu_objset_close(os); | |
| 932 if (err != ESRCH) | |
| 5367 | 933 goto out; |
| 2199 | 934 |
| 5367 | 935 if (ds->ds_user_ptr) { |
| 936 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 937 ds->ds_user_ptr = NULL; | |
| 938 } | |
| 939 | |
| 940 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); | |
| 941 err = dsl_dir_open_obj(dd->dd_pool, dd->dd_object, NULL, FTAG, &dd); | |
| 942 rw_exit(&dd->dd_pool->dp_config_rwlock); | |
| 943 | |
| 1544 | 944 if (err) |
| 5367 | 945 goto out; |
| 789 | 946 |
| 2199 | 947 /* |
| 948 * Blow away the dsl_dir + head dataset. | |
| 949 */ | |
| 950 dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool); | |
| 951 dsl_sync_task_create(dstg, dsl_dataset_destroy_check, | |
| 5367 | 952 dsl_dataset_destroy_sync, ds, tag, 0); |
| 2199 | 953 dsl_sync_task_create(dstg, dsl_dir_destroy_check, |
| 954 dsl_dir_destroy_sync, dd, FTAG, 0); | |
| 955 err = dsl_sync_task_group_wait(dstg); | |
| 956 dsl_sync_task_group_destroy(dstg); | |
| 957 /* if it is successful, *destroy_sync will close the ds+dd */ | |
| 5367 | 958 if (err) |
| 2199 | 959 dsl_dir_close(dd, FTAG); |
| 5367 | 960 out: |
| 961 if (err) | |
| 962 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); | |
| 789 | 963 return (err); |
| 964 } | |
| 965 | |
| 966 int | |
| 5367 | 967 dsl_dataset_rollback(dsl_dataset_t *ds, dmu_objset_type_t ost) |
| 789 | 968 { |
|
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969 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 5367 | 970 |
| 2199 | 971 return (dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 972 dsl_dataset_rollback_check, dsl_dataset_rollback_sync, | |
| 5367 | 973 ds, &ost, 0)); |
| 789 | 974 } |
| 975 | |
| 976 void * | |
| 977 dsl_dataset_set_user_ptr(dsl_dataset_t *ds, | |
| 978 void *p, dsl_dataset_evict_func_t func) | |
| 979 { | |
| 980 void *old; | |
| 981 | |
| 982 mutex_enter(&ds->ds_lock); | |
| 983 old = ds->ds_user_ptr; | |
| 984 if (old == NULL) { | |
| 985 ds->ds_user_ptr = p; | |
| 986 ds->ds_user_evict_func = func; | |
| 987 } | |
| 988 mutex_exit(&ds->ds_lock); | |
| 989 return (old); | |
| 990 } | |
| 991 | |
| 992 void * | |
| 993 dsl_dataset_get_user_ptr(dsl_dataset_t *ds) | |
| 994 { | |
| 995 return (ds->ds_user_ptr); | |
| 996 } | |
| 997 | |
| 998 | |
|
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999 blkptr_t * |
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1000 dsl_dataset_get_blkptr(dsl_dataset_t *ds) |
| 789 | 1001 { |
|
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1002 return (&ds->ds_phys->ds_bp); |
| 789 | 1003 } |
| 1004 | |
| 1005 void | |
| 1006 dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 1007 { | |
| 1008 ASSERT(dmu_tx_is_syncing(tx)); | |
| 1009 /* If it's the meta-objset, set dp_meta_rootbp */ | |
| 1010 if (ds == NULL) { | |
| 1011 tx->tx_pool->dp_meta_rootbp = *bp; | |
| 1012 } else { | |
| 1013 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1014 ds->ds_phys->ds_bp = *bp; | |
| 1015 } | |
| 1016 } | |
| 1017 | |
| 1018 spa_t * | |
| 1019 dsl_dataset_get_spa(dsl_dataset_t *ds) | |
| 1020 { | |
| 1021 return (ds->ds_dir->dd_pool->dp_spa); | |
| 1022 } | |
| 1023 | |
| 1024 void | |
| 1025 dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
| 1026 { | |
| 1027 dsl_pool_t *dp; | |
| 1028 | |
| 1029 if (ds == NULL) /* this is the meta-objset */ | |
| 1030 return; | |
| 1031 | |
| 1032 ASSERT(ds->ds_user_ptr != NULL); | |
| 2885 | 1033 |
| 1034 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 1035 panic("dirtying snapshot!"); | |
| 789 | 1036 |
| 1037 dp = ds->ds_dir->dd_pool; | |
| 1038 | |
| 1039 if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) { | |
| 1040 /* up the hold count until we can be written out */ | |
| 1041 dmu_buf_add_ref(ds->ds_dbuf, ds); | |
| 1042 } | |
| 1043 } | |
| 1044 | |
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1045 /* |
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1046 * The unique space in the head dataset can be calculated by subtracting |
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1047 * the space used in the most recent snapshot, that is still being used |
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1048 * in this file system, from the space currently in use. To figure out |
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1049 * the space in the most recent snapshot still in use, we need to take |
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1050 * the total space used in the snapshot and subtract out the space that |
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1051 * has been freed up since the snapshot was taken. |
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1052 */ |
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1053 static void |
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1054 dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) |
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1055 { |
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1056 uint64_t mrs_used; |
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1057 uint64_t dlused, dlcomp, dluncomp; |
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1058 |
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1059 ASSERT(ds->ds_object == ds->ds_dir->dd_phys->dd_head_dataset_obj); |
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1060 |
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1061 if (ds->ds_phys->ds_prev_snap_obj != 0) |
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1062 mrs_used = ds->ds_prev->ds_phys->ds_used_bytes; |
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1063 else |
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1064 mrs_used = 0; |
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1065 |
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1066 VERIFY(0 == bplist_space(&ds->ds_deadlist, &dlused, &dlcomp, |
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1067 &dluncomp)); |
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1068 |
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1069 ASSERT3U(dlused, <=, mrs_used); |
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1070 ds->ds_phys->ds_unique_bytes = |
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1071 ds->ds_phys->ds_used_bytes - (mrs_used - dlused); |
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1072 |
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1073 if (!DS_UNIQUE_IS_ACCURATE(ds) && |
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1074 spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
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1075 SPA_VERSION_UNIQUE_ACCURATE) |
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1076 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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1077 } |
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1078 |
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1079 static uint64_t |
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1080 dsl_dataset_unique(dsl_dataset_t *ds) |
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1081 { |
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1082 if (!DS_UNIQUE_IS_ACCURATE(ds) && !dsl_dataset_is_snapshot(ds)) |
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1083 dsl_dataset_recalc_head_uniq(ds); |
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1084 |
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1085 return (ds->ds_phys->ds_unique_bytes); |
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1086 } |
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1087 |
| 789 | 1088 struct killarg { |
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1089 int64_t *usedp; |
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1090 int64_t *compressedp; |
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1091 int64_t *uncompressedp; |
| 789 | 1092 zio_t *zio; |
| 1093 dmu_tx_t *tx; | |
| 1094 }; | |
| 1095 | |
| 1096 static int | |
| 1097 kill_blkptr(traverse_blk_cache_t *bc, spa_t *spa, void *arg) | |
| 1098 { | |
| 1099 struct killarg *ka = arg; | |
| 1100 blkptr_t *bp = &bc->bc_blkptr; | |
| 1101 | |
| 1102 ASSERT3U(bc->bc_errno, ==, 0); | |
| 1103 | |
| 1104 /* | |
| 1105 * Since this callback is not called concurrently, no lock is | |
| 1106 * needed on the accounting values. | |
| 1107 */ | |
| 2082 | 1108 *ka->usedp += bp_get_dasize(spa, bp); |
| 789 | 1109 *ka->compressedp += BP_GET_PSIZE(bp); |
| 1110 *ka->uncompressedp += BP_GET_UCSIZE(bp); | |
| 1111 /* XXX check for EIO? */ | |
| 1112 (void) arc_free(ka->zio, spa, ka->tx->tx_txg, bp, NULL, NULL, | |
| 1113 ARC_NOWAIT); | |
| 1114 return (0); | |
| 1115 } | |
| 1116 | |
| 1117 /* ARGSUSED */ | |
| 2199 | 1118 static int |
| 1119 dsl_dataset_rollback_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 789 | 1120 { |
| 2199 | 1121 dsl_dataset_t *ds = arg1; |
| 5367 | 1122 dmu_objset_type_t *ost = arg2; |
| 789 | 1123 |
| 2199 | 1124 /* |
| 5367 | 1125 * We can only roll back to emptyness if it is a ZPL objset. |
| 2199 | 1126 */ |
| 5367 | 1127 if (*ost != DMU_OST_ZFS && ds->ds_phys->ds_prev_snap_txg == 0) |
| 789 | 1128 return (EINVAL); |
| 1129 | |
| 2199 | 1130 /* |
| 1131 * This must not be a snapshot. | |
| 1132 */ | |
| 1133 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 1134 return (EINVAL); | |
| 789 | 1135 |
| 1136 /* | |
| 1137 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1138 * them. Try again. | |
| 1139 */ | |
| 2199 | 1140 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1141 return (EAGAIN); |
| 2199 | 1142 |
| 1143 return (0); | |
| 1144 } | |
| 789 | 1145 |
| 2199 | 1146 /* ARGSUSED */ |
| 1147 static void | |
| 4543 | 1148 dsl_dataset_rollback_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1149 { |
| 1150 dsl_dataset_t *ds = arg1; | |
| 5367 | 1151 dmu_objset_type_t *ost = arg2; |
| 2199 | 1152 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 789 | 1153 |
| 1154 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1155 | |
|
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1156 /* |
|
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1157 * Before the roll back destroy the zil. |
|
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1158 */ |
|
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1159 if (ds->ds_user_ptr != NULL) { |
|
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1160 zil_rollback_destroy( |
|
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1161 ((objset_impl_t *)ds->ds_user_ptr)->os_zil, tx); |
| 5367 | 1162 |
| 1163 /* | |
| 1164 * We need to make sure that the objset_impl_t is reopened after | |
| 1165 * we do the rollback, otherwise it will have the wrong | |
| 1166 * objset_phys_t. Normally this would happen when this | |
| 1167 * DS_MODE_EXCLUSIVE dataset-open is closed, thus causing the | |
| 1168 * dataset to be immediately evicted. But when doing "zfs recv | |
| 1169 * -F", we reopen the objset before that, so that there is no | |
| 1170 * window where the dataset is closed and inconsistent. | |
| 1171 */ | |
| 1172 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 1173 ds->ds_user_ptr = NULL; | |
|
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1174 } |
|
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1175 |
| 789 | 1176 /* Zero out the deadlist. */ |
| 1177 bplist_close(&ds->ds_deadlist); | |
| 1178 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1179 ds->ds_phys->ds_deadlist_obj = | |
| 1180 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1181 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1182 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1183 |
| 1184 { | |
| 1185 /* Free blkptrs that we gave birth to */ | |
| 1186 zio_t *zio; | |
|
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1187 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 789 | 1188 struct killarg ka; |
|
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1189 int64_t delta; |
| 789 | 1190 |
| 1191 zio = zio_root(tx->tx_pool->dp_spa, NULL, NULL, | |
| 1192 ZIO_FLAG_MUSTSUCCEED); | |
| 1193 ka.usedp = &used; | |
| 1194 ka.compressedp = &compressed; | |
| 1195 ka.uncompressedp = &uncompressed; | |
| 1196 ka.zio = zio; | |
| 1197 ka.tx = tx; | |
| 1198 (void) traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1199 ADVANCE_POST, kill_blkptr, &ka); | |
| 1200 (void) zio_wait(zio); | |
| 1201 | |
|
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1202 /* only deduct space beyond any refreservation */ |
|
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1203 delta = parent_delta(ds, -used); |
| 2199 | 1204 dsl_dir_diduse_space(ds->ds_dir, |
|
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1205 delta, -compressed, -uncompressed, tx); |
| 789 | 1206 } |
| 1207 | |
| 5367 | 1208 if (ds->ds_prev) { |
| 1209 /* Change our contents to that of the prev snapshot */ | |
| 1210 ASSERT3U(ds->ds_prev->ds_object, ==, | |
| 1211 ds->ds_phys->ds_prev_snap_obj); | |
| 1212 ds->ds_phys->ds_bp = ds->ds_prev->ds_phys->ds_bp; | |
| 1213 ds->ds_phys->ds_used_bytes = | |
| 1214 ds->ds_prev->ds_phys->ds_used_bytes; | |
| 1215 ds->ds_phys->ds_compressed_bytes = | |
| 1216 ds->ds_prev->ds_phys->ds_compressed_bytes; | |
| 1217 ds->ds_phys->ds_uncompressed_bytes = | |
| 1218 ds->ds_prev->ds_phys->ds_uncompressed_bytes; | |
| 1219 ds->ds_phys->ds_flags = ds->ds_prev->ds_phys->ds_flags; | |
| 1220 ds->ds_phys->ds_unique_bytes = 0; | |
| 789 | 1221 |
| 5367 | 1222 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { |
| 1223 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 1224 ds->ds_prev->ds_phys->ds_unique_bytes = 0; | |
| 1225 } | |
| 1226 } else { | |
| 1227 /* Zero out our contents, recreate objset */ | |
| 1228 bzero(&ds->ds_phys->ds_bp, sizeof (blkptr_t)); | |
| 1229 ds->ds_phys->ds_used_bytes = 0; | |
| 1230 ds->ds_phys->ds_compressed_bytes = 0; | |
| 1231 ds->ds_phys->ds_uncompressed_bytes = 0; | |
| 1232 ds->ds_phys->ds_flags = 0; | |
| 1233 ds->ds_phys->ds_unique_bytes = 0; | |
| 1234 (void) dmu_objset_create_impl(ds->ds_dir->dd_pool->dp_spa, ds, | |
| 1235 &ds->ds_phys->ds_bp, *ost, tx); | |
|
2532
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1236 } |
| 4543 | 1237 |
| 1238 spa_history_internal_log(LOG_DS_ROLLBACK, ds->ds_dir->dd_pool->dp_spa, | |
| 1239 tx, cr, "dataset = %llu", ds->ds_object); | |
| 789 | 1240 } |
| 1241 | |
|
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1242 /* ARGSUSED */ |
|
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1243 static int |
| 2199 | 1244 dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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1245 { |
| 2199 | 1246 dsl_dataset_t *ds = arg1; |
| 5367 | 1247 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 1248 uint64_t count; | |
| 1249 int err; | |
|
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1250 |
|
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1251 /* |
|
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1252 * Can't delete a head dataset if there are snapshots of it. |
|
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1253 * (Except if the only snapshots are from the branch we cloned |
|
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1254 * from.) |
|
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1255 */ |
|
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1256 if (ds->ds_prev != NULL && |
|
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1257 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
|
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1258 return (EINVAL); |
|
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1259 |
| 5367 | 1260 /* |
| 1261 * This is really a dsl_dir thing, but check it here so that | |
| 1262 * we'll be less likely to leave this dataset inconsistent & | |
| 1263 * nearly destroyed. | |
| 1264 */ | |
| 1265 err = zap_count(mos, ds->ds_dir->dd_phys->dd_child_dir_zapobj, &count); | |
| 1266 if (err) | |
| 1267 return (err); | |
| 1268 if (count != 0) | |
| 1269 return (EEXIST); | |
| 1270 | |
|
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1271 return (0); |
|
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1272 } |
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1273 |
| 2199 | 1274 /* ARGSUSED */ |
| 1275 static void | |
| 4543 | 1276 dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1277 { |
| 2199 | 1278 dsl_dataset_t *ds = arg1; |
| 4543 | 1279 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
| 789 | 1280 |
| 2199 | 1281 /* Mark it as inconsistent on-disk, in case we crash */ |
| 1282 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1283 ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
| 4543 | 1284 |
| 1285 spa_history_internal_log(LOG_DS_DESTROY_BEGIN, dp->dp_spa, tx, | |
| 1286 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1287 } |
| 789 | 1288 |
| 2199 | 1289 /* ARGSUSED */ |
| 5367 | 1290 int |
| 2199 | 1291 dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 1292 { | |
| 1293 dsl_dataset_t *ds = arg1; | |
| 789 | 1294 |
| 1295 /* Can't delete a branch point. */ | |
| 2199 | 1296 if (ds->ds_phys->ds_num_children > 1) |
| 1297 return (EEXIST); | |
| 789 | 1298 |
| 1299 /* | |
| 1300 * Can't delete a head dataset if there are snapshots of it. | |
| 1301 * (Except if the only snapshots are from the branch we cloned | |
| 1302 * from.) | |
| 1303 */ | |
| 1304 if (ds->ds_prev != NULL && | |
| 2199 | 1305 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
| 789 | 1306 return (EINVAL); |
| 1307 | |
| 1308 /* | |
| 1309 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1310 * them. Try again. | |
| 1311 */ | |
| 2199 | 1312 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1313 return (EAGAIN); |
| 2199 | 1314 |
| 1315 /* XXX we should do some i/o error checking... */ | |
| 1316 return (0); | |
| 1317 } | |
| 1318 | |
| 5367 | 1319 void |
| 4543 | 1320 dsl_dataset_destroy_sync(void *arg1, void *tag, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1321 { |
| 1322 dsl_dataset_t *ds = arg1; | |
|
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1323 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 2199 | 1324 zio_t *zio; |
| 1325 int err; | |
| 1326 int after_branch_point = FALSE; | |
| 1327 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 1328 objset_t *mos = dp->dp_meta_objset; | |
| 1329 dsl_dataset_t *ds_prev = NULL; | |
| 1330 uint64_t obj; | |
| 1331 | |
|
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1332 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 2199 | 1333 ASSERT3U(ds->ds_phys->ds_num_children, <=, 1); |
| 1334 ASSERT(ds->ds_prev == NULL || | |
| 1335 ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object); | |
| 1336 ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg); | |
| 1337 | |
|
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1338 /* Remove our reservation */ |
|
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1339 if (ds->ds_reserved != 0) { |
|
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1340 uint64_t val = 0; |
|
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1341 dsl_dataset_set_reservation_sync(ds, &val, cr, tx); |
|
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1342 ASSERT3U(ds->ds_reserved, ==, 0); |
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1343 } |
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1344 |
| 2199 | 1345 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 1346 | |
| 1347 obj = ds->ds_object; | |
| 789 | 1348 |
| 1349 if (ds->ds_phys->ds_prev_snap_obj != 0) { | |
| 1350 if (ds->ds_prev) { | |
| 1351 ds_prev = ds->ds_prev; | |
| 1352 } else { | |
| 2199 | 1353 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1354 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 2199 | 1355 DS_MODE_NONE, FTAG, &ds_prev)); |
| 789 | 1356 } |
| 1357 after_branch_point = | |
| 1358 (ds_prev->ds_phys->ds_next_snap_obj != obj); | |
| 1359 | |
| 1360 dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); | |
| 1361 if (after_branch_point && | |
| 1362 ds->ds_phys->ds_next_snap_obj == 0) { | |
| 1363 /* This clone is toast. */ | |
| 1364 ASSERT(ds_prev->ds_phys->ds_num_children > 1); | |
| 1365 ds_prev->ds_phys->ds_num_children--; | |
| 1366 } else if (!after_branch_point) { | |
| 1367 ds_prev->ds_phys->ds_next_snap_obj = | |
| 1368 ds->ds_phys->ds_next_snap_obj; | |
| 1369 } | |
| 1370 } | |
| 1371 | |
| 1372 zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
| 1373 | |
| 1374 if (ds->ds_phys->ds_next_snap_obj != 0) { | |
| 2199 | 1375 blkptr_t bp; |
| 789 | 1376 dsl_dataset_t *ds_next; |
| 1377 uint64_t itor = 0; | |
|
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1378 uint64_t old_unique; |
| 789 | 1379 |
| 1380 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 1381 | |
| 2199 | 1382 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1383 ds->ds_phys->ds_next_snap_obj, NULL, |
| 1384 DS_MODE_NONE, FTAG, &ds_next)); | |
| 789 | 1385 ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj); |
| 1386 | |
|
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1387 old_unique = dsl_dataset_unique(ds_next); |
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1388 |
| 789 | 1389 dmu_buf_will_dirty(ds_next->ds_dbuf, tx); |
| 1390 ds_next->ds_phys->ds_prev_snap_obj = | |
| 1391 ds->ds_phys->ds_prev_snap_obj; | |
| 1392 ds_next->ds_phys->ds_prev_snap_txg = | |
| 1393 ds->ds_phys->ds_prev_snap_txg; | |
| 1394 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, | |
| 1395 ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0); | |
| 1396 | |
| 1397 /* | |
| 1398 * Transfer to our deadlist (which will become next's | |
| 1399 * new deadlist) any entries from next's current | |
| 1400 * deadlist which were born before prev, and free the | |
| 1401 * other entries. | |
| 1402 * | |
| 1403 * XXX we're doing this long task with the config lock held | |
| 1404 */ | |
| 1405 while (bplist_iterate(&ds_next->ds_deadlist, &itor, | |
| 1406 &bp) == 0) { | |
| 1407 if (bp.blk_birth <= ds->ds_phys->ds_prev_snap_txg) { | |
| 1544 | 1408 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, |
| 1409 &bp, tx)); | |
| 789 | 1410 if (ds_prev && !after_branch_point && |
| 1411 bp.blk_birth > | |
| 1412 ds_prev->ds_phys->ds_prev_snap_txg) { | |
| 1413 ds_prev->ds_phys->ds_unique_bytes += | |
| 2082 | 1414 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1415 } |
| 1416 } else { | |
| 2082 | 1417 used += bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1418 compressed += BP_GET_PSIZE(&bp); |
| 1419 uncompressed += BP_GET_UCSIZE(&bp); | |
| 1420 /* XXX check return value? */ | |
| 1421 (void) arc_free(zio, dp->dp_spa, tx->tx_txg, | |
| 1422 &bp, NULL, NULL, ARC_NOWAIT); | |
| 1423 } | |
| 1424 } | |
| 1425 | |
| 1426 /* free next's deadlist */ | |
| 1427 bplist_close(&ds_next->ds_deadlist); | |
| 1428 bplist_destroy(mos, ds_next->ds_phys->ds_deadlist_obj, tx); | |
| 1429 | |
| 1430 /* set next's deadlist to our deadlist */ | |
| 1431 ds_next->ds_phys->ds_deadlist_obj = | |
| 1432 ds->ds_phys->ds_deadlist_obj; | |
| 1544 | 1433 VERIFY(0 == bplist_open(&ds_next->ds_deadlist, mos, |
| 1434 ds_next->ds_phys->ds_deadlist_obj)); | |
| 789 | 1435 ds->ds_phys->ds_deadlist_obj = 0; |
| 1436 | |
| 1437 if (ds_next->ds_phys->ds_next_snap_obj != 0) { | |
| 1438 /* | |
| 1439 * Update next's unique to include blocks which | |
| 1440 * were previously shared by only this snapshot | |
| 1441 * and it. Those blocks will be born after the | |
| 1442 * prev snap and before this snap, and will have | |
| 1443 * died after the next snap and before the one | |
| 1444 * after that (ie. be on the snap after next's | |
| 1445 * deadlist). | |
| 1446 * | |
| 1447 * XXX we're doing this long task with the | |
| 1448 * config lock held | |
| 1449 */ | |
| 1450 dsl_dataset_t *ds_after_next; | |
| 1451 | |
| 2199 | 1452 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1453 ds_next->ds_phys->ds_next_snap_obj, NULL, |
| 1544 | 1454 DS_MODE_NONE, FTAG, &ds_after_next)); |
| 789 | 1455 itor = 0; |
| 1456 while (bplist_iterate(&ds_after_next->ds_deadlist, | |
| 1457 &itor, &bp) == 0) { | |
| 1458 if (bp.blk_birth > | |
| 1459 ds->ds_phys->ds_prev_snap_txg && | |
| 1460 bp.blk_birth <= | |
| 1461 ds->ds_phys->ds_creation_txg) { | |
| 1462 ds_next->ds_phys->ds_unique_bytes += | |
| 2082 | 1463 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1464 } |
| 1465 } | |
| 1466 | |
| 1467 dsl_dataset_close(ds_after_next, DS_MODE_NONE, FTAG); | |
| 1468 ASSERT3P(ds_next->ds_prev, ==, NULL); | |
| 1469 } else { | |
| 1470 ASSERT3P(ds_next->ds_prev, ==, ds); | |
| 1471 dsl_dataset_close(ds_next->ds_prev, DS_MODE_NONE, | |
| 1472 ds_next); | |
| 1473 if (ds_prev) { | |
| 2199 | 1474 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1475 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 1476 DS_MODE_NONE, ds_next, &ds_next->ds_prev)); | |
| 789 | 1477 } else { |
| 1478 ds_next->ds_prev = NULL; | |
| 1479 } | |
|
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1480 |
|
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1481 dsl_dataset_recalc_head_uniq(ds_next); |
|
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1482 |
|
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|
1483 /* |
|
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1484 * Reduce the amount of our unconsmed refreservation |
|
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1485 * being charged to our parent by the amount of |
|
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1486 * new unique data we have gained. |
|
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|
1487 */ |
|
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1488 if (old_unique < ds_next->ds_reserved) { |
|
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|
1489 int64_t mrsdelta; |
|
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1490 uint64_t new_unique = |
|
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1491 ds_next->ds_phys->ds_unique_bytes; |
|
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1492 |
|
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1493 ASSERT(old_unique <= new_unique); |
|
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1494 mrsdelta = MIN(new_unique - old_unique, |
|
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1495 ds_next->ds_reserved - old_unique); |
|
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1496 dsl_dir_diduse_space(ds->ds_dir, -mrsdelta, |
|
111aa1baa84a
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|
1497 0, 0, tx); |
|
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|
1498 } |
| 789 | 1499 } |
| 1500 dsl_dataset_close(ds_next, DS_MODE_NONE, FTAG); | |
| 1501 | |
| 1502 /* | |
|
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1503 * NB: unique_bytes might not be accurate for the head objset. |
|
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1504 * Before SPA_VERSION 9, we didn't update its value when we |
|
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|
1505 * deleted the most recent snapshot. |
| 789 | 1506 */ |
| 1507 ASSERT3U(used, ==, ds->ds_phys->ds_unique_bytes); | |
| 1508 } else { | |
| 1509 /* | |
| 1510 * There's no next snapshot, so this is a head dataset. | |
| 1511 * Destroy the deadlist. Unless it's a clone, the | |
| 1512 * deadlist should be empty. (If it's a clone, it's | |
| 1513 * safe to ignore the deadlist contents.) | |
| 1514 */ | |
| 1515 struct killarg ka; | |
| 1516 | |
| 1517 ASSERT(after_branch_point || bplist_empty(&ds->ds_deadlist)); | |
| 1518 bplist_close(&ds->ds_deadlist); | |
| 1519 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1520 ds->ds_phys->ds_deadlist_obj = 0; | |
| 1521 | |
| 1522 /* | |
| 1523 * Free everything that we point to (that's born after | |
| 1524 * the previous snapshot, if we are a clone) | |
| 1525 * | |
| 1526 * XXX we're doing this long task with the config lock held | |
| 1527 */ | |
| 1528 ka.usedp = &used; | |
| 1529 ka.compressedp = &compressed; | |
| 1530 ka.uncompressedp = &uncompressed; | |
| 1531 ka.zio = zio; | |
| 1532 ka.tx = tx; | |
| 1533 err = traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1534 ADVANCE_POST, kill_blkptr, &ka); | |
| 1535 ASSERT3U(err, ==, 0); | |
|
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1536 ASSERT(spa_version(dp->dp_spa) < |
|
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1537 SPA_VERSION_UNIQUE_ACCURATE || |
|
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|
1538 used == ds->ds_phys->ds_unique_bytes); |
| 789 | 1539 } |
| 1540 | |
| 1541 err = zio_wait(zio); | |
| 1542 ASSERT3U(err, ==, 0); | |
| 1543 | |
| 2199 | 1544 dsl_dir_diduse_space(ds->ds_dir, -used, -compressed, -uncompressed, tx); |
| 789 | 1545 |
| 1546 if (ds->ds_phys->ds_snapnames_zapobj) { | |
| 1547 err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx); | |
| 1548 ASSERT(err == 0); | |
| 1549 } | |
| 1550 | |
| 2199 | 1551 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) { |
| 789 | 1552 /* Erase the link in the dataset */ |
| 2199 | 1553 dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); |
| 1554 ds->ds_dir->dd_phys->dd_head_dataset_obj = 0; | |
| 789 | 1555 /* |
| 1556 * dsl_dir_sync_destroy() called us, they'll destroy | |
| 1557 * the dataset. | |
| 1558 */ | |
| 1559 } else { | |
| 1560 /* remove from snapshot namespace */ | |
| 1561 dsl_dataset_t *ds_head; | |
| 2199 | 1562 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1563 ds->ds_dir->dd_phys->dd_head_dataset_obj, NULL, | |
| 1544 | 1564 DS_MODE_NONE, FTAG, &ds_head)); |
|
2207
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|
1565 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 1566 #ifdef ZFS_DEBUG |
| 1567 { | |
| 1568 uint64_t val; | |
|
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|
1569 |
|
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|
1570 err = dsl_dataset_snap_lookup(mos, |
|
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|
1571 ds_head->ds_phys->ds_flags, |
| 789 | 1572 ds_head->ds_phys->ds_snapnames_zapobj, |
|
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|
1573 ds->ds_snapname, &val); |
| 789 | 1574 ASSERT3U(err, ==, 0); |
| 1575 ASSERT3U(val, ==, obj); | |
| 1576 } | |
| 1577 #endif | |
|
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|
1578 err = dsl_dataset_snap_remove(mos, |
|
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|
1579 ds_head->ds_phys->ds_flags, |
|
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|
1580 ds_head->ds_phys->ds_snapnames_zapobj, |
| 2199 | 1581 ds->ds_snapname, tx); |
| 789 | 1582 ASSERT(err == 0); |
| 1583 dsl_dataset_close(ds_head, DS_MODE_NONE, FTAG); | |
| 1584 } | |
| 1585 | |
| 1586 if (ds_prev && ds->ds_prev != ds_prev) | |
| 1587 dsl_dataset_close(ds_prev, DS_MODE_NONE, FTAG); | |
| 1588 | |
| 5094 | 1589 spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx); |
| 4543 | 1590 spa_history_internal_log(LOG_DS_DESTROY, dp->dp_spa, tx, |
| 1591 cr, "dataset = %llu", ds->ds_object); | |
| 1592 | |
| 2199 | 1593 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); |
| 1594 VERIFY(0 == dmu_object_free(mos, obj, tx)); | |
| 3912 | 1595 |
| 2199 | 1596 } |
| 1597 | |
|
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|
1598 static int |
|
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|
1599 dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
|
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|
1600 { |
|
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|
1601 uint64_t asize; |
|
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|
1602 |
|
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|
1603 if (!dmu_tx_is_syncing(tx)) |
|
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|
1604 return (0); |
|
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|
1605 |
|
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|
1606 /* |
|
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|
1607 * If there's an fs-only reservation, any blocks that might become |
|
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|
1608 * owned by the snapshot dataset must be accommodated by space |
|
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|
1609 * outside of the reservation. |
|
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|
1610 */ |
|
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|
1611 asize = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
|
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|
1612 if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, FALSE)) |
|
111aa1baa84a
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|
1613 return (ENOSPC); |
|
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|
1614 |
|
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|
1615 /* |
|
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|
1616 * Propogate any reserved space for this snapshot to other |
|
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|
1617 * snapshot checks in this sync group. |
|
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|
1618 */ |
|
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|
1619 if (asize > 0) |
|
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|
1620 dsl_dir_willuse_space(ds->ds_dir, asize, tx); |
|
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|
1621 |
|
111aa1baa84a
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|
1622 return (0); |
|
111aa1baa84a
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|
1623 } |
|
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|
1624 |
| 2199 | 1625 /* ARGSUSED */ |
| 1626 int | |
| 1627 dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 1628 { | |
| 5367 | 1629 dsl_dataset_t *ds = arg1; |
| 2199 | 1630 const char *snapname = arg2; |
| 1631 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
| 1632 int err; | |
| 1633 uint64_t value; | |
| 789 | 1634 |
| 1635 /* | |
| 2199 | 1636 * We don't allow multiple snapshots of the same txg. If there |
| 1637 * is already one, try again. | |
| 1638 */ | |
| 1639 if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg) | |
| 1640 return (EAGAIN); | |
| 1641 | |
| 1642 /* | |
| 1643 * Check for conflicting name snapshot name. | |
| 789 | 1644 */ |
|
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|
1645 err = dsl_dataset_snap_lookup(mos, ds->ds_phys->ds_flags, |
|
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6654808 FIGNORECASE lookups in a zfs xattr dir don't provide 'realname' data
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|
1646 ds->ds_phys->ds_snapnames_zapobj, snapname, &value); |
| 2199 | 1647 if (err == 0) |
| 1648 return (EEXIST); | |
| 1649 if (err != ENOENT) | |
| 1650 return (err); | |
| 789 | 1651 |
|
3978
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
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|
1652 /* |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
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|
1653 * Check that the dataset's name is not too long. Name consists |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
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|
1654 * of the dataset's length + 1 for the @-sign + snapshot name's length |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
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|
1655 */ |
|
2dd668007b7a
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|
1656 if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN) |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
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|
1657 return (ENAMETOOLONG); |
|
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|
1658 |
|
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|
1659 err = dsl_dataset_snapshot_reserve_space(ds, tx); |
|
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|
1660 if (err) |
|
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|
1661 return (err); |
|
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|
1662 |
| 2199 | 1663 ds->ds_trysnap_txg = tx->tx_txg; |
| 789 | 1664 return (0); |
| 1665 } | |
| 1666 | |
| 2199 | 1667 void |
| 4543 | 1668 dsl_dataset_snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1669 { |
| 5367 | 1670 dsl_dataset_t *ds = arg1; |
| 2199 | 1671 const char *snapname = arg2; |
| 1672 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 789 | 1673 dmu_buf_t *dbuf; |
| 1674 dsl_dataset_phys_t *dsphys; | |
| 2199 | 1675 uint64_t dsobj; |
| 789 | 1676 objset_t *mos = dp->dp_meta_objset; |
| 1677 int err; | |
| 1678 | |
| 1679 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 2199 | 1680 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 789 | 1681 |
|
928
36d72fe4da29
6349314 dmu_object_type names incorrect for DSL Directories and DSL Datasets
tabriz
parents:
885
diff
changeset
|
1682 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
|
36d72fe4da29
6349314 dmu_object_type names incorrect for DSL Directories and DSL Datasets
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changeset
|
1683 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 1684 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 1685 dmu_buf_will_dirty(dbuf, tx); |
| 1686 dsphys = dbuf->db_data; | |
| 2199 | 1687 dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
| 789 | 1688 dsphys->ds_fsid_guid = unique_create(); |
| 1689 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 1690 sizeof (dsphys->ds_guid)); | |
| 1691 dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj; | |
| 1692 dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg; | |
| 1693 dsphys->ds_next_snap_obj = ds->ds_object; | |
| 1694 dsphys->ds_num_children = 1; | |
| 1695 dsphys->ds_creation_time = gethrestime_sec(); | |
| 1696 dsphys->ds_creation_txg = tx->tx_txg; | |
| 1697 dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj; | |
| 1698 dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes; | |
| 1699 dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes; | |
| 1700 dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 1701 dsphys->ds_flags = ds->ds_phys->ds_flags; |
| 789 | 1702 dsphys->ds_bp = ds->ds_phys->ds_bp; |
| 1544 | 1703 dmu_buf_rele(dbuf, FTAG); |
| 789 | 1704 |
| 2199 | 1705 ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0); |
| 1706 if (ds->ds_prev) { | |
| 1707 ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj == | |
| 789 | 1708 ds->ds_object || |
| 2199 | 1709 ds->ds_prev->ds_phys->ds_num_children > 1); |
| 1710 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { | |
| 1711 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 789 | 1712 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, |
| 2199 | 1713 ds->ds_prev->ds_phys->ds_creation_txg); |
| 1714 ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj; | |
| 789 | 1715 } |
| 1716 } | |
| 1717 | |
|
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1718 /* |
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1719 * If we have a reference-reservation on this dataset, we will |
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1720 * need to increase the amount of refreservation being charged |
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1721 * since our unique space is going to zero. |
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1722 */ |
|
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1723 if (ds->ds_reserved) { |
|
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1724 int64_t add = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
|
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1725 dsl_dir_diduse_space(ds->ds_dir, add, 0, 0, tx); |
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1726 } |
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1727 |
| 789 | 1728 bplist_close(&ds->ds_deadlist); |
| 1729 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
|
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1730 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, tx->tx_txg); |
| 789 | 1731 ds->ds_phys->ds_prev_snap_obj = dsobj; |
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1732 ds->ds_phys->ds_prev_snap_txg = tx->tx_txg; |
| 789 | 1733 ds->ds_phys->ds_unique_bytes = 0; |
|
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1734 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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1735 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 789 | 1736 ds->ds_phys->ds_deadlist_obj = |
| 1737 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1738 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1739 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1740 |
| 1741 dprintf("snap '%s' -> obj %llu\n", snapname, dsobj); | |
| 1742 err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj, | |
| 1743 snapname, 8, 1, &dsobj, tx); | |
| 1744 ASSERT(err == 0); | |
| 1745 | |
| 1746 if (ds->ds_prev) | |
| 1747 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
| 1544 | 1748 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1749 ds->ds_phys->ds_prev_snap_obj, snapname, | |
| 1750 DS_MODE_NONE, ds, &ds->ds_prev)); | |
| 4543 | 1751 |
| 1752 spa_history_internal_log(LOG_DS_SNAPSHOT, dp->dp_spa, tx, cr, | |
|
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1753 "dataset = %llu", dsobj); |
| 789 | 1754 } |
| 1755 | |
| 1756 void | |
|
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1757 dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) |
| 789 | 1758 { |
| 1759 ASSERT(dmu_tx_is_syncing(tx)); | |
| 1760 ASSERT(ds->ds_user_ptr != NULL); | |
| 1761 ASSERT(ds->ds_phys->ds_next_snap_obj == 0); | |
| 1762 | |
| 4787 | 1763 /* |
| 1764 * in case we had to change ds_fsid_guid when we opened it, | |
| 1765 * sync it out now. | |
| 1766 */ | |
| 1767 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1768 ds->ds_phys->ds_fsid_guid = ds->ds_fsid_guid; | |
| 1769 | |
| 789 | 1770 dsl_dir_dirty(ds->ds_dir, tx); |
|
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1771 dmu_objset_sync(ds->ds_user_ptr, zio, tx); |
| 789 | 1772 } |
| 1773 | |
| 1774 void | |
| 2885 | 1775 dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) |
| 789 | 1776 { |
|
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1777 uint64_t refd, avail, uobjs, aobjs; |
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1778 |
| 2885 | 1779 dsl_dir_stats(ds->ds_dir, nv); |
| 789 | 1780 |
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1781 dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); |
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1782 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); |
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1783 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); |
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1784 |
| 2885 | 1785 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, |
| 1786 ds->ds_phys->ds_creation_time); | |
| 1787 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, | |
| 1788 ds->ds_phys->ds_creation_txg); | |
|
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1789 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
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1790 ds->ds_quota); |
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1791 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, |
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1792 ds->ds_reserved); |
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1793 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, |
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1794 ds->ds_phys->ds_guid); |
| 789 | 1795 |
| 1796 if (ds->ds_phys->ds_next_snap_obj) { | |
| 1797 /* | |
| 1798 * This is a snapshot; override the dd's space used with | |
| 2885 | 1799 * our unique space and compression ratio. |
| 789 | 1800 */ |
| 2885 | 1801 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, |
| 1802 ds->ds_phys->ds_unique_bytes); | |
| 1803 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, | |
| 1804 ds->ds_phys->ds_compressed_bytes == 0 ? 100 : | |
| 1805 (ds->ds_phys->ds_uncompressed_bytes * 100 / | |
| 1806 ds->ds_phys->ds_compressed_bytes)); | |
| 789 | 1807 } |
| 1808 } | |
| 1809 | |
| 2885 | 1810 void |
| 1811 dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
| 789 | 1812 { |
| 2885 | 1813 stat->dds_creation_txg = ds->ds_phys->ds_creation_txg; |
| 1814 stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT; | |
| 5367 | 1815 stat->dds_guid = ds->ds_phys->ds_guid; |
| 2885 | 1816 if (ds->ds_phys->ds_next_snap_obj) { |
| 1817 stat->dds_is_snapshot = B_TRUE; | |
| 1818 stat->dds_num_clones = ds->ds_phys->ds_num_children - 1; | |
| 1819 } | |
| 1820 | |
| 1821 /* clone origin is really a dsl_dir thing... */ | |
| 5446 | 1822 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); |
| 5367 | 1823 if (ds->ds_dir->dd_phys->dd_origin_obj) { |
| 2885 | 1824 dsl_dataset_t *ods; |
| 1825 | |
| 1826 VERIFY(0 == dsl_dataset_open_obj(ds->ds_dir->dd_pool, | |
| 5367 | 1827 ds->ds_dir->dd_phys->dd_origin_obj, |
| 2885 | 1828 NULL, DS_MODE_NONE, FTAG, &ods)); |
| 5367 | 1829 dsl_dataset_name(ods, stat->dds_origin); |
| 2885 | 1830 dsl_dataset_close(ods, DS_MODE_NONE, FTAG); |
| 1831 } | |
| 5446 | 1832 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); |
| 2885 | 1833 } |
| 1834 | |
| 1835 uint64_t | |
| 1836 dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
| 1837 { | |
| 4787 | 1838 return (ds->ds_fsid_guid); |
| 2885 | 1839 } |
| 1840 | |
| 1841 void | |
| 1842 dsl_dataset_space(dsl_dataset_t *ds, | |
| 1843 uint64_t *refdbytesp, uint64_t *availbytesp, | |
| 1844 uint64_t *usedobjsp, uint64_t *availobjsp) | |
| 1845 { | |
| 1846 *refdbytesp = ds->ds_phys->ds_used_bytes; | |
| 1847 *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); | |
|
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1848 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) |
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1849 *availbytesp += ds->ds_reserved - ds->ds_phys->ds_unique_bytes; |
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1850 if (ds->ds_quota != 0) { |
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1851 /* |
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1852 * Adjust available bytes according to refquota |
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1853 */ |
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1854 if (*refdbytesp < ds->ds_quota) |
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1855 *availbytesp = MIN(*availbytesp, |
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1856 ds->ds_quota - *refdbytesp); |
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1857 else |
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1858 *availbytesp = 0; |
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1859 } |
| 2885 | 1860 *usedobjsp = ds->ds_phys->ds_bp.blk_fill; |
| 1861 *availobjsp = DN_MAX_OBJECT - *usedobjsp; | |
| 789 | 1862 } |
| 1863 | |
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1864 boolean_t |
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1865 dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds) |
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1866 { |
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1867 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
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1868 |
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1869 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || |
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1870 dsl_pool_sync_context(dp)); |
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1871 if (ds->ds_prev == NULL) |
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1872 return (B_FALSE); |
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1873 if (ds->ds_phys->ds_bp.blk_birth > |
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1874 ds->ds_prev->ds_phys->ds_creation_txg) |
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1875 return (B_TRUE); |
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1876 return (B_FALSE); |
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1877 } |
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1878 |
| 2199 | 1879 /* ARGSUSED */ |
| 789 | 1880 static int |
| 2199 | 1881 dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 789 | 1882 { |
| 2199 | 1883 dsl_dataset_t *ds = arg1; |
| 1884 char *newsnapname = arg2; | |
| 1885 dsl_dir_t *dd = ds->ds_dir; | |
| 789 | 1886 objset_t *mos = dd->dd_pool->dp_meta_objset; |
| 2199 | 1887 dsl_dataset_t *hds; |
| 1888 uint64_t val; | |
| 789 | 1889 int err; |
| 1890 | |
| 2199 | 1891 err = dsl_dataset_open_obj(dd->dd_pool, |
| 1892 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds); | |
| 789 | 1893 if (err) |
| 1894 return (err); | |
| 1895 | |
| 2199 | 1896 /* new name better not be in use */ |
|
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1897 err = dsl_dataset_snap_lookup(mos, hds->ds_phys->ds_flags, |
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1898 hds->ds_phys->ds_snapnames_zapobj, newsnapname, &val); |
| 2199 | 1899 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); |
| 789 | 1900 |
| 2199 | 1901 if (err == 0) |
| 1902 err = EEXIST; | |
| 1903 else if (err == ENOENT) | |
| 1904 err = 0; | |
| 4007 | 1905 |
| 1906 /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
| 1907 if (dsl_dir_namelen(ds->ds_dir) + 1 + strlen(newsnapname) >= MAXNAMELEN) | |
| 1908 err = ENAMETOOLONG; | |
| 1909 | |
| 2199 | 1910 return (err); |
| 1911 } | |
| 789 | 1912 |
| 2199 | 1913 static void |
| 4543 | 1914 dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, |
| 1915 cred_t *cr, dmu_tx_t *tx) | |
| 2199 | 1916 { |
| 1917 dsl_dataset_t *ds = arg1; | |
| 4543 | 1918 const char *newsnapname = arg2; |
| 2199 | 1919 dsl_dir_t *dd = ds->ds_dir; |
| 1920 objset_t *mos = dd->dd_pool->dp_meta_objset; | |
| 1921 dsl_dataset_t *hds; | |
| 1922 int err; | |
| 789 | 1923 |
| 2199 | 1924 ASSERT(ds->ds_phys->ds_next_snap_obj != 0); |
| 789 | 1925 |
| 2199 | 1926 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, |
| 1927 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds)); | |
| 789 | 1928 |
| 2199 | 1929 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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1930 err = dsl_dataset_snap_remove(mos, hds->ds_phys->ds_flags, |
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1931 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, tx); |
| 789 | 1932 ASSERT3U(err, ==, 0); |
| 2199 | 1933 mutex_enter(&ds->ds_lock); |
| 1934 (void) strcpy(ds->ds_snapname, newsnapname); | |
| 1935 mutex_exit(&ds->ds_lock); | |
| 1936 err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1937 ds->ds_snapname, 8, 1, &ds->ds_object, tx); | |
| 789 | 1938 ASSERT3U(err, ==, 0); |
| 1939 | |
| 4543 | 1940 spa_history_internal_log(LOG_DS_RENAME, dd->dd_pool->dp_spa, tx, |
| 1941 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1942 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); |
| 789 | 1943 } |
| 1944 | |
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1945 struct renamesnaparg { |
| 4007 | 1946 dsl_sync_task_group_t *dstg; |
| 1947 char failed[MAXPATHLEN]; | |
| 1948 char *oldsnap; | |
| 1949 char *newsnap; | |
| 1950 }; | |
| 1951 | |
| 1952 static int | |
| 1953 dsl_snapshot_rename_one(char *name, void *arg) | |
| 1954 { | |
|
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1955 struct renamesnaparg *ra = arg; |
| 4007 | 1956 dsl_dataset_t *ds = NULL; |
| 1957 char *cp; | |
| 1958 int err; | |
| 1959 | |
| 1960 cp = name + strlen(name); | |
| 1961 *cp = '@'; | |
| 1962 (void) strcpy(cp + 1, ra->oldsnap); | |
| 4543 | 1963 |
| 1964 /* | |
| 1965 * For recursive snapshot renames the parent won't be changing | |
| 1966 * so we just pass name for both the to/from argument. | |
| 1967 */ | |
| 1968 if (err = zfs_secpolicy_rename_perms(name, name, CRED())) { | |
| 1969 (void) strcpy(ra->failed, name); | |
| 1970 return (err); | |
| 1971 } | |
| 1972 | |
| 4007 | 1973 err = dsl_dataset_open(name, DS_MODE_READONLY | DS_MODE_STANDARD, |
| 1974 ra->dstg, &ds); | |
| 1975 if (err == ENOENT) { | |
| 1976 *cp = '\0'; | |
| 1977 return (0); | |
| 1978 } | |
| 1979 if (err) { | |
| 1980 (void) strcpy(ra->failed, name); | |
| 1981 *cp = '\0'; | |
| 1982 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 1983 return (err); | |
| 1984 } | |
| 1985 | |
| 1986 #ifdef _KERNEL | |
| 1987 /* for all filesystems undergoing rename, we'll need to unmount it */ | |
| 1988 (void) zfs_unmount_snap(name, NULL); | |
| 1989 #endif | |
| 1990 | |
| 1991 *cp = '\0'; | |
| 1992 | |
| 1993 dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check, | |
| 1994 dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0); | |
| 1995 | |
| 1996 return (0); | |
| 1997 } | |
| 1998 | |
| 1999 static int | |
| 2000 dsl_recursive_rename(char *oldname, const char *newname) | |
| 2001 { | |
| 2002 int err; | |
|
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2003 struct renamesnaparg *ra; |
| 4007 | 2004 dsl_sync_task_t *dst; |
| 2005 spa_t *spa; | |
| 2006 char *cp, *fsname = spa_strdup(oldname); | |
| 2007 int len = strlen(oldname); | |
| 2008 | |
| 2009 /* truncate the snapshot name to get the fsname */ | |
| 2010 cp = strchr(fsname, '@'); | |
| 2011 *cp = '\0'; | |
| 2012 | |
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2013 err = spa_open(fsname, &spa, FTAG); |
| 4007 | 2014 if (err) { |
| 2015 kmem_free(fsname, len + 1); | |
| 2016 return (err); | |
| 2017 } | |
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2018 ra = kmem_alloc(sizeof (struct renamesnaparg), KM_SLEEP); |
| 4007 | 2019 ra->dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); |
| 2020 | |
| 2021 ra->oldsnap = strchr(oldname, '@') + 1; | |
| 2022 ra->newsnap = strchr(newname, '@') + 1; | |
| 2023 *ra->failed = '\0'; | |
| 2024 | |
| 2025 err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra, | |
| 2026 DS_FIND_CHILDREN); | |
| 2027 kmem_free(fsname, len + 1); | |
| 2028 | |
| 2029 if (err == 0) { | |
| 2030 err = dsl_sync_task_group_wait(ra->dstg); | |
| 2031 } | |
| 2032 | |
| 2033 for (dst = list_head(&ra->dstg->dstg_tasks); dst; | |
| 2034 dst = list_next(&ra->dstg->dstg_tasks, dst)) { | |
| 2035 dsl_dataset_t *ds = dst->dst_arg1; | |
| 2036 if (dst->dst_err) { | |
| 2037 dsl_dir_name(ds->ds_dir, ra->failed); | |
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2038 (void) strcat(ra->failed, "@"); |
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2039 (void) strcat(ra->failed, ra->newsnap); |
| 4007 | 2040 } |
| 2041 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 2042 } | |
| 2043 | |
| 4543 | 2044 if (err) |
| 2045 (void) strcpy(oldname, ra->failed); | |
| 4007 | 2046 |
| 2047 dsl_sync_task_group_destroy(ra->dstg); | |
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2048 kmem_free(ra, sizeof (struct renamesnaparg)); |
| 4007 | 2049 spa_close(spa, FTAG); |
| 2050 return (err); | |
| 2051 } | |
| 2052 | |
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2053 static int |
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2054 dsl_valid_rename(char *oldname, void *arg) |
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2055 { |
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2056 int delta = *(int *)arg; |
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2057 |
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2058 if (strlen(oldname) + delta >= MAXNAMELEN) |
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2059 return (ENAMETOOLONG); |
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2060 |
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2061 return (0); |
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2062 } |
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|
2063 |
| 789 | 2064 #pragma weak dmu_objset_rename = dsl_dataset_rename |
| 2065 int | |
| 4007 | 2066 dsl_dataset_rename(char *oldname, const char *newname, |
| 2067 boolean_t recursive) | |
| 789 | 2068 { |
| 2069 dsl_dir_t *dd; | |
| 2199 | 2070 dsl_dataset_t *ds; |
| 789 | 2071 const char *tail; |
| 2072 int err; | |
| 2073 | |
| 2199 | 2074 err = dsl_dir_open(oldname, FTAG, &dd, &tail); |
| 1544 | 2075 if (err) |
| 2076 return (err); | |
| 789 | 2077 if (tail == NULL) { |
|
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2078 int delta = strlen(newname) - strlen(oldname); |
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2079 |
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|
2080 /* if we're growing, validate child size lengths */ |
|
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2081 if (delta > 0) |
|
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|
2082 err = dmu_objset_find(oldname, dsl_valid_rename, |
|
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|
2083 &delta, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS); |
|
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|
2084 |
|
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2085 if (!err) |
|
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|
2086 err = dsl_dir_rename(dd, newname); |
| 789 | 2087 dsl_dir_close(dd, FTAG); |
| 2088 return (err); | |
| 2089 } | |
| 2090 if (tail[0] != '@') { | |
| 2091 /* the name ended in a nonexistant component */ | |
| 2092 dsl_dir_close(dd, FTAG); | |
| 2093 return (ENOENT); | |
| 2094 } | |
| 2095 | |
| 2199 | 2096 dsl_dir_close(dd, FTAG); |
| 2097 | |
| 2098 /* new name must be snapshot in same filesystem */ | |
| 2099 tail = strchr(newname, '@'); | |
| 2100 if (tail == NULL) | |
| 2101 return (EINVAL); | |
| 2102 tail++; | |
| 2103 if (strncmp(oldname, newname, tail - newname) != 0) | |
| 2104 return (EXDEV); | |
| 789 | 2105 |
| 4007 | 2106 if (recursive) { |
| 2107 err = dsl_recursive_rename(oldname, newname); | |
| 2108 } else { | |
| 2109 err = dsl_dataset_open(oldname, | |
| 2110 DS_MODE_READONLY | DS_MODE_STANDARD, FTAG, &ds); | |
| 2111 if (err) | |
| 2112 return (err); | |
| 2199 | 2113 |
| 4007 | 2114 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2115 dsl_dataset_snapshot_rename_check, | |
| 2116 dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1); | |
| 2199 | 2117 |
| 4007 | 2118 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
| 2119 } | |
| 2199 | 2120 |
| 789 | 2121 return (err); |
| 2122 } | |
| 2082 | 2123 |
| 2199 | 2124 struct promotearg { |
| 2125 uint64_t used, comp, uncomp, unique; | |
|
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|
2126 uint64_t ds_flags, newnext_obj, snapnames_obj; |
| 2199 | 2127 }; |
| 2128 | |
| 4543 | 2129 /* ARGSUSED */ |
| 2082 | 2130 static int |
| 2199 | 2131 dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 2082 | 2132 { |
| 2199 | 2133 dsl_dataset_t *hds = arg1; |
| 2134 struct promotearg *pa = arg2; | |
| 2135 dsl_dir_t *dd = hds->ds_dir; | |
| 2136 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2137 dsl_dir_t *odd = NULL; |
| 2082 | 2138 dsl_dataset_t *ds = NULL; |
| 5367 | 2139 dsl_dataset_t *origin_ds = NULL; |
| 2082 | 2140 dsl_dataset_t *newnext_ds = NULL; |
| 2141 int err; | |
| 2142 char *name = NULL; | |
| 2199 | 2143 uint64_t itor = 0; |
| 2082 | 2144 blkptr_t bp; |
| 2145 | |
| 2199 | 2146 bzero(pa, sizeof (*pa)); |
| 2147 | |
| 2082 | 2148 /* Check that it is a clone */ |
| 5367 | 2149 if (dd->dd_phys->dd_origin_obj == 0) |
| 2082 | 2150 return (EINVAL); |
| 2151 | |
| 2199 | 2152 /* Since this is so expensive, don't do the preliminary check */ |
| 2153 if (!dmu_tx_is_syncing(tx)) | |
| 2154 return (0); | |
| 2155 | |
| 5367 | 2156 if (err = dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
| 2157 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)) | |
| 2082 | 2158 goto out; |
| 5367 | 2159 odd = origin_ds->ds_dir; |
| 2199 | 2160 |
| 2161 { | |
| 2162 dsl_dataset_t *phds; | |
| 2163 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 5367 | 2164 odd->dd_phys->dd_head_dataset_obj, |
| 2199 | 2165 NULL, DS_MODE_NONE, FTAG, &phds)) |
| 2166 goto out; | |
|
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|
2167 pa->ds_flags = phds->ds_phys->ds_flags; |
| 2199 | 2168 pa->snapnames_obj = phds->ds_phys->ds_snapnames_zapobj; |
| 2169 dsl_dataset_close(phds, DS_MODE_NONE, FTAG); | |
| 2170 } | |
| 2082 | 2171 |
| 2172 if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE) { | |
| 2173 err = EXDEV; | |
| 2174 goto out; | |
| 2175 } | |
| 2176 | |
| 5367 | 2177 /* find origin's new next ds */ |
| 2082 | 2178 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, hds->ds_object, |
| 2179 NULL, DS_MODE_NONE, FTAG, &newnext_ds)); | |
| 5367 | 2180 while (newnext_ds->ds_phys->ds_prev_snap_obj != origin_ds->ds_object) { |
| 2082 | 2181 dsl_dataset_t *prev; |
| 2182 | |
| 2183 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 2199 | 2184 newnext_ds->ds_phys->ds_prev_snap_obj, |
| 2185 NULL, DS_MODE_NONE, FTAG, &prev)) | |
| 2082 | 2186 goto out; |
| 2187 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 2188 newnext_ds = prev; | |
| 2189 } | |
| 2199 | 2190 pa->newnext_obj = newnext_ds->ds_object; |
| 2082 | 2191 |
| 5367 | 2192 /* compute origin's new unique space */ |
| 2082 | 2193 while ((err = bplist_iterate(&newnext_ds->ds_deadlist, |
| 2194 &itor, &bp)) == 0) { | |
| 5367 | 2195 if (bp.blk_birth > origin_ds->ds_phys->ds_prev_snap_txg) |
| 2199 | 2196 pa->unique += bp_get_dasize(dd->dd_pool->dp_spa, &bp); |
| 2082 | 2197 } |
| 2198 if (err != ENOENT) | |
| 2199 goto out; | |
| 2200 | |
| 2201 /* Walk the snapshots that we are moving */ | |
| 2202 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
| 5367 | 2203 ds = origin_ds; |
| 2082 | 2204 /* CONSTCOND */ |
| 2205 while (TRUE) { | |
| 2206 uint64_t val, dlused, dlcomp, dluncomp; | |
| 2207 dsl_dataset_t *prev; | |
| 2208 | |
| 2209 /* Check that the snapshot name does not conflict */ | |
| 2210 dsl_dataset_name(ds, name); | |
|
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|
2211 err = dsl_dataset_snap_lookup(dd->dd_pool->dp_meta_objset, |
|
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|
2212 hds->ds_phys->ds_flags, hds->ds_phys->ds_snapnames_zapobj, |
|
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|
2213 ds->ds_snapname, &val); |
| 2082 | 2214 if (err != ENOENT) { |
| 2215 if (err == 0) | |
| 2216 err = EEXIST; | |
| 2217 goto out; | |
| 2218 } | |
| 2219 | |
| 2220 /* | |
| 2221 * compute space to transfer. Each snapshot gave birth to: | |
| 2222 * (my used) - (prev's used) + (deadlist's used) | |
| 2223 */ | |
| 2199 | 2224 pa->used += ds->ds_phys->ds_used_bytes; |
| 2225 pa->comp += ds->ds_phys->ds_compressed_bytes; | |
| 2226 pa->uncomp += ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 2227 |
| 2228 /* If we reach the first snapshot, we're done. */ | |
| 2229 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 2230 break; | |
| 2231 | |
| 2232 if (err = bplist_space(&ds->ds_deadlist, | |
| 2233 &dlused, &dlcomp, &dluncomp)) | |
| 2234 goto out; | |
| 2235 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 2236 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, | |
| 2237 FTAG, &prev)) | |
| 2238 goto out; | |
| 2199 | 2239 pa->used += dlused - prev->ds_phys->ds_used_bytes; |
| 2240 pa->comp += dlcomp - prev->ds_phys->ds_compressed_bytes; | |
| 2241 pa->uncomp += dluncomp - prev->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 2242 |
| 2243 /* | |
| 2244 * We could be a clone of a clone. If we reach our | |
| 2245 * parent's branch point, we're done. | |
| 2246 */ | |
| 2247 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 2248 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 2249 break; | |
| 2250 } | |
| 5367 | 2251 if (ds != origin_ds) |
| 2082 | 2252 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2253 ds = prev; | |
| 2254 } | |
| 2255 | |
| 2256 /* Check that there is enough space here */ | |
| 5367 | 2257 err = dsl_dir_transfer_possible(odd, dd, pa->used); |
| 2199 | 2258 |
| 2259 out: | |
| 5367 | 2260 if (ds && ds != origin_ds) |
| 2199 | 2261 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 5367 | 2262 if (origin_ds) |
| 2263 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 2199 | 2264 if (newnext_ds) |
| 2265 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 2266 if (name) | |
| 2267 kmem_free(name, MAXPATHLEN); | |
| 2268 return (err); | |
| 2269 } | |
| 2082 | 2270 |
| 2199 | 2271 static void |
| 4543 | 2272 dsl_dataset_promote_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 2273 { |
| 2274 dsl_dataset_t *hds = arg1; | |
| 2275 struct promotearg *pa = arg2; | |
| 2276 dsl_dir_t *dd = hds->ds_dir; | |
| 2277 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2278 dsl_dir_t *odd = NULL; |
| 2279 dsl_dataset_t *ds, *origin_ds; | |
| 2199 | 2280 char *name; |
| 2281 | |
| 5367 | 2282 ASSERT(dd->dd_phys->dd_origin_obj != 0); |
| 2199 | 2283 ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)); |
| 2284 | |
| 5367 | 2285 VERIFY(0 == dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
| 2286 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)); | |
| 2417 | 2287 /* |
| 5367 | 2288 * We need to explicitly open odd, since origin_ds's dd will be |
| 2417 | 2289 * changing. |
| 2290 */ | |
| 5367 | 2291 VERIFY(0 == dsl_dir_open_obj(dp, origin_ds->ds_dir->dd_object, |
| 2292 NULL, FTAG, &odd)); | |
| 2082 | 2293 |
| 2294 /* move snapshots to this dir */ | |
| 2199 | 2295 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
| 5367 | 2296 ds = origin_ds; |
| 2082 | 2297 /* CONSTCOND */ |
| 2298 while (TRUE) { | |
| 2299 dsl_dataset_t *prev; | |
| 2300 | |
| 2301 /* move snap name entry */ | |
| 2302 dsl_dataset_name(ds, name); | |
|
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diff
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|
2303 VERIFY(0 == dsl_dataset_snap_remove(dp->dp_meta_objset, |
|
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|
2304 pa->ds_flags, pa->snapnames_obj, ds->ds_snapname, tx)); |
| 2199 | 2305 VERIFY(0 == zap_add(dp->dp_meta_objset, |
| 2082 | 2306 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, |
| 2307 8, 1, &ds->ds_object, tx)); | |
| 2308 | |
| 2309 /* change containing dsl_dir */ | |
| 2310 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 5367 | 2311 ASSERT3U(ds->ds_phys->ds_dir_obj, ==, odd->dd_object); |
| 2082 | 2312 ds->ds_phys->ds_dir_obj = dd->dd_object; |
| 5367 | 2313 ASSERT3P(ds->ds_dir, ==, odd); |
| 2082 | 2314 dsl_dir_close(ds->ds_dir, ds); |
| 2199 | 2315 VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, |
| 2082 | 2316 NULL, ds, &ds->ds_dir)); |
| 2317 | |
| 2318 ASSERT3U(dsl_prop_numcb(ds), ==, 0); | |
| 2319 | |
| 2320 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 2321 break; | |
| 2322 | |
| 2199 | 2323 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 2082 | 2324 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, |
| 2325 FTAG, &prev)); | |
| 2326 | |
| 2327 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 2328 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 2329 break; | |
| 2330 } | |
| 5367 | 2331 if (ds != origin_ds) |
| 2082 | 2332 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2333 ds = prev; | |
| 2334 } | |
| 5367 | 2335 if (ds != origin_ds) |
| 2199 | 2336 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2082 | 2337 |
| 5367 | 2338 /* change origin's next snap */ |
| 2339 dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
| 2340 origin_ds->ds_phys->ds_next_snap_obj = pa->newnext_obj; | |
| 2082 | 2341 |
| 5367 | 2342 /* change origin */ |
| 2082 | 2343 dmu_buf_will_dirty(dd->dd_dbuf, tx); |
| 5367 | 2344 ASSERT3U(dd->dd_phys->dd_origin_obj, ==, origin_ds->ds_object); |
| 2345 dd->dd_phys->dd_origin_obj = odd->dd_phys->dd_origin_obj; | |
| 2346 dmu_buf_will_dirty(odd->dd_dbuf, tx); | |
| 2347 odd->dd_phys->dd_origin_obj = origin_ds->ds_object; | |
| 2082 | 2348 |
| 2349 /* change space accounting */ | |
| 5367 | 2350 dsl_dir_diduse_space(odd, -pa->used, -pa->comp, -pa->uncomp, tx); |
| 2199 | 2351 dsl_dir_diduse_space(dd, pa->used, pa->comp, pa->uncomp, tx); |
| 5367 | 2352 origin_ds->ds_phys->ds_unique_bytes = pa->unique; |
| 2082 | 2353 |
| 4543 | 2354 /* log history record */ |
| 2355 spa_history_internal_log(LOG_DS_PROMOTE, dd->dd_pool->dp_spa, tx, | |
| 2356 cr, "dataset = %llu", ds->ds_object); | |
| 2357 | |
| 5367 | 2358 dsl_dir_close(odd, FTAG); |
| 2359 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 2199 | 2360 kmem_free(name, MAXPATHLEN); |
| 2082 | 2361 } |
| 2362 | |
| 2363 int | |
| 2364 dsl_dataset_promote(const char *name) | |
| 2365 { | |
| 2366 dsl_dataset_t *ds; | |
| 2367 int err; | |
| 2368 dmu_object_info_t doi; | |
| 2199 | 2369 struct promotearg pa; |
| 2082 | 2370 |
| 2371 err = dsl_dataset_open(name, DS_MODE_NONE, FTAG, &ds); | |
| 2372 if (err) | |
| 2373 return (err); | |
| 2374 | |
| 2375 err = dmu_object_info(ds->ds_dir->dd_pool->dp_meta_objset, | |
| 2376 ds->ds_phys->ds_snapnames_zapobj, &doi); | |
| 2377 if (err) { | |
| 2378 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 2379 return (err); | |
| 2380 } | |
| 2381 | |
| 2382 /* | |
| 2383 * Add in 128x the snapnames zapobj size, since we will be moving | |
| 2384 * a bunch of snapnames to the promoted ds, and dirtying their | |
| 2385 * bonus buffers. | |
| 2386 */ | |
| 2199 | 2387 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2388 dsl_dataset_promote_check, | |
| 2389 dsl_dataset_promote_sync, ds, &pa, 2 + 2 * doi.doi_physical_blks); | |
| 2082 | 2390 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 2391 return (err); | |
| 2392 } | |
| 3912 | 2393 |
| 5367 | 2394 struct cloneswaparg { |
| 2395 dsl_dataset_t *cds; /* clone dataset */ | |
| 2396 dsl_dataset_t *ohds; /* origin's head dataset */ | |
| 2397 boolean_t force; | |
|
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2398 int64_t unused_refres_delta; /* change in unconsumed refreservation */ |
| 5367 | 2399 }; |
|
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2400 |
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2401 /* ARGSUSED */ |
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2402 static int |
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2403 dsl_dataset_clone_swap_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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2404 { |
| 5367 | 2405 struct cloneswaparg *csa = arg1; |
|
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2406 |
| 5367 | 2407 /* they should both be heads */ |
| 2408 if (dsl_dataset_is_snapshot(csa->cds) || | |
| 2409 dsl_dataset_is_snapshot(csa->ohds)) | |
|
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2410 return (EINVAL); |
|
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2411 |
| 5367 | 2412 /* the branch point should be just before them */ |
| 2413 if (csa->cds->ds_prev != csa->ohds->ds_prev) | |
|
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2414 return (EINVAL); |
|
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2415 |
| 5367 | 2416 /* cds should be the clone */ |
| 2417 if (csa->cds->ds_prev->ds_phys->ds_next_snap_obj != | |
| 2418 csa->ohds->ds_object) | |
| 2419 return (EINVAL); | |
|
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2420 |
| 5367 | 2421 /* the clone should be a child of the origin */ |
| 2422 if (csa->cds->ds_dir->dd_parent != csa->ohds->ds_dir) | |
| 2423 return (EINVAL); | |
|
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2424 |
| 5367 | 2425 /* ohds shouldn't be modified unless 'force' */ |
| 2426 if (!csa->force && dsl_dataset_modified_since_lastsnap(csa->ohds)) | |
| 2427 return (ETXTBSY); | |
|
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2428 |
|
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2429 /* adjust amount of any unconsumed refreservation */ |
|
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2430 csa->unused_refres_delta = |
|
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2431 (int64_t)MIN(csa->ohds->ds_reserved, |
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2432 csa->ohds->ds_phys->ds_unique_bytes) - |
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2433 (int64_t)MIN(csa->ohds->ds_reserved, |
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2434 csa->cds->ds_phys->ds_unique_bytes); |
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2435 |
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2436 if (csa->unused_refres_delta > 0 && |
|
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2437 csa->unused_refres_delta > |
|
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2438 dsl_dir_space_available(csa->ohds->ds_dir, NULL, 0, TRUE)) |
|
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2439 return (ENOSPC); |
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2440 |
| 5367 | 2441 return (0); |
|
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|
2442 } |
|
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2443 |
|
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2444 /* ARGSUSED */ |
|
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2445 static void |
|
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|
2446 dsl_dataset_clone_swap_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
|
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2447 { |
| 5367 | 2448 struct cloneswaparg *csa = arg1; |
| 2449 dsl_pool_t *dp = csa->cds->ds_dir->dd_pool; | |
|
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2450 uint64_t itor = 0; |
|
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2451 blkptr_t bp; |
|
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|
2452 uint64_t unique = 0; |
|
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2453 int err; |
|
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2454 |
|
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2455 ASSERT(csa->cds->ds_reserved == 0); |
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2456 ASSERT(csa->cds->ds_quota == csa->ohds->ds_quota); |
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2457 |
| 5367 | 2458 dmu_buf_will_dirty(csa->cds->ds_dbuf, tx); |
| 2459 dmu_buf_will_dirty(csa->ohds->ds_dbuf, tx); | |
| 2460 dmu_buf_will_dirty(csa->cds->ds_prev->ds_dbuf, tx); | |
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2461 |
| 5367 | 2462 if (csa->cds->ds_user_ptr != NULL) { |
| 2463 csa->cds->ds_user_evict_func(csa->cds, csa->cds->ds_user_ptr); | |
| 2464 csa->cds->ds_user_ptr = NULL; | |
| 2465 } | |
|
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2466 |
| 5367 | 2467 if (csa->ohds->ds_user_ptr != NULL) { |
| 2468 csa->ohds->ds_user_evict_func(csa->ohds, | |
| 2469 csa->ohds->ds_user_ptr); | |
| 2470 csa->ohds->ds_user_ptr = NULL; | |
| 2471 } | |
|
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2472 |
|
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|
2473 /* compute unique space */ |
| 5367 | 2474 while ((err = bplist_iterate(&csa->cds->ds_deadlist, |
| 2475 &itor, &bp)) == 0) { | |
| 2476 if (bp.blk_birth > csa->cds->ds_prev->ds_phys->ds_prev_snap_txg) | |
| 2477 unique += bp_get_dasize(dp->dp_spa, &bp); | |
|
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2478 } |
|
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|
2479 VERIFY(err == ENOENT); |
|
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|
2480 |
|
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|
2481 /* reset origin's unique bytes */ |
| 5367 | 2482 csa->cds->ds_prev->ds_phys->ds_unique_bytes = unique; |
|
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2483 |
|
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|
2484 /* swap blkptrs */ |
|
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|
2485 { |
|
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|
2486 blkptr_t tmp; |
| 5367 | 2487 tmp = csa->ohds->ds_phys->ds_bp; |
| 2488 csa->ohds->ds_phys->ds_bp = csa->cds->ds_phys->ds_bp; | |
| 2489 csa->cds->ds_phys->ds_bp = tmp; | |
|
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|
2490 } |
|
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|
2491 |
|
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|
2492 /* set dd_*_bytes */ |
|
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|
2493 { |
|
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|
2494 int64_t dused, dcomp, duncomp; |
|
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|
2495 uint64_t cdl_used, cdl_comp, cdl_uncomp; |
|
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|
2496 uint64_t odl_used, odl_comp, odl_uncomp; |
|
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|
2497 |
| 5367 | 2498 VERIFY(0 == bplist_space(&csa->cds->ds_deadlist, &cdl_used, |
|
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|
2499 &cdl_comp, &cdl_uncomp)); |
| 5367 | 2500 VERIFY(0 == bplist_space(&csa->ohds->ds_deadlist, &odl_used, |
|
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|
2501 &odl_comp, &odl_uncomp)); |
| 5367 | 2502 dused = csa->cds->ds_phys->ds_used_bytes + cdl_used - |
| 2503 (csa->ohds->ds_phys->ds_used_bytes + odl_used); | |
| 2504 dcomp = csa->cds->ds_phys->ds_compressed_bytes + cdl_comp - | |
| 2505 (csa->ohds->ds_phys->ds_compressed_bytes + odl_comp); | |
| 2506 duncomp = csa->cds->ds_phys->ds_uncompressed_bytes + | |
| 2507 cdl_uncomp - | |
| 2508 (csa->ohds->ds_phys->ds_uncompressed_bytes + odl_uncomp); | |
|
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2509 |
| 5367 | 2510 dsl_dir_diduse_space(csa->ohds->ds_dir, |
| 2511 dused, dcomp, duncomp, tx); | |
| 2512 dsl_dir_diduse_space(csa->cds->ds_dir, | |
| 2513 -dused, -dcomp, -duncomp, tx); | |
| 2514 } | |
| 2515 | |
| 2516 #define SWITCH64(x, y) \ | |
| 2517 { \ | |
| 2518 uint64_t __tmp = (x); \ | |
| 2519 (x) = (y); \ | |
| 2520 (y) = __tmp; \ | |
|
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2521 } |
|
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|
2522 |
|
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|
2523 /* swap ds_*_bytes */ |
| 5367 | 2524 SWITCH64(csa->ohds->ds_phys->ds_used_bytes, |
| 2525 csa->cds->ds_phys->ds_used_bytes); | |
| 2526 SWITCH64(csa->ohds->ds_phys->ds_compressed_bytes, | |
| 2527 csa->cds->ds_phys->ds_compressed_bytes); | |
| 2528 SWITCH64(csa->ohds->ds_phys->ds_uncompressed_bytes, | |
| 2529 csa->cds->ds_phys->ds_uncompressed_bytes); | |
|
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2530 SWITCH64(csa->ohds->ds_phys->ds_unique_bytes, |
|
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|
2531 csa->cds->ds_phys->ds_unique_bytes); |
|
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2532 |
|
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|
2533 /* apply any parent delta for change in unconsumed refreservation */ |
|
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|
2534 dsl_dir_diduse_space(csa->ohds->ds_dir, csa->unused_refres_delta, |
|
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|
2535 0, 0, tx); |
|
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2536 |
|
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|
2537 /* swap deadlists */ |
| 5367 | 2538 bplist_close(&csa->cds->ds_deadlist); |
| 2539 bplist_close(&csa->ohds->ds_deadlist); | |
| 2540 SWITCH64(csa->ohds->ds_phys->ds_deadlist_obj, | |
| 2541 csa->cds->ds_phys->ds_deadlist_obj); | |
| 2542 VERIFY(0 == bplist_open(&csa->cds->ds_deadlist, dp->dp_meta_objset, | |
| 2543 csa->cds->ds_phys->ds_deadlist_obj)); | |
| 2544 VERIFY(0 == bplist_open(&csa->ohds->ds_deadlist, dp->dp_meta_objset, | |
| 2545 csa->ohds->ds_phys->ds_deadlist_obj)); | |
|
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|
2546 } |
|
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|
2547 |
|
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|
2548 /* |
|
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|
2549 * Swap 'clone' with its origin head file system. |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2550 */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2551 int |
| 5367 | 2552 dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, |
| 2553 boolean_t force) | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2554 { |
| 5367 | 2555 struct cloneswaparg csa; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2556 |
| 5367 | 2557 ASSERT(clone->ds_open_refcount == DS_REF_MAX); |
| 2558 ASSERT(origin_head->ds_open_refcount == DS_REF_MAX); | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2559 |
| 5367 | 2560 csa.cds = clone; |
| 2561 csa.ohds = origin_head; | |
| 2562 csa.force = force; | |
| 2563 return (dsl_sync_task_do(clone->ds_dir->dd_pool, | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2564 dsl_dataset_clone_swap_check, |
| 5367 | 2565 dsl_dataset_clone_swap_sync, &csa, NULL, 9)); |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2566 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2567 |
| 3912 | 2568 /* |
| 2569 * Given a pool name and a dataset object number in that pool, | |
| 2570 * return the name of that dataset. | |
| 2571 */ | |
| 2572 int | |
| 2573 dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) | |
| 2574 { | |
| 2575 spa_t *spa; | |
| 2576 dsl_pool_t *dp; | |
| 2577 dsl_dataset_t *ds = NULL; | |
| 2578 int error; | |
| 2579 | |
| 2580 if ((error = spa_open(pname, &spa, FTAG)) != 0) | |
| 2581 return (error); | |
| 2582 dp = spa_get_dsl(spa); | |
| 2583 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 2584 if ((error = dsl_dataset_open_obj(dp, obj, | |
| 2585 NULL, DS_MODE_NONE, FTAG, &ds)) != 0) { | |
| 2586 rw_exit(&dp->dp_config_rwlock); | |
| 2587 spa_close(spa, FTAG); | |
| 2588 return (error); | |
| 2589 } | |
| 2590 dsl_dataset_name(ds, buf); | |
| 2591 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 2592 rw_exit(&dp->dp_config_rwlock); | |
| 2593 spa_close(spa, FTAG); | |
| 2594 | |
| 2595 return (0); | |
| 2596 } | |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2597 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2598 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2599 dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
|
5831
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2600 uint64_t asize, uint64_t inflight, uint64_t *used, |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2601 uint64_t *ref_rsrv) |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2602 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2603 int error = 0; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2604 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2605 ASSERT3S(asize, >, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2606 |
|
5831
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2607 /* |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2608 * *ref_rsrv is the portion of asize that will come from any |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2609 * unconsumed refreservation space. |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2610 */ |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2611 *ref_rsrv = 0; |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2612 |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2613 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2614 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2615 * Make a space adjustment for reserved bytes. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2616 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2617 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2618 ASSERT3U(*used, >=, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2619 ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2620 *used -= (ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
|
5831
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2621 *ref_rsrv = |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2622 asize - MIN(asize, parent_delta(ds, asize + inflight)); |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2623 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2624 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2625 if (!check_quota || ds->ds_quota == 0) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2626 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2627 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2628 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2629 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2630 * If they are requesting more space, and our current estimate |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2631 * is over quota, they get to try again unless the actual |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2632 * on-disk is over quota and there are no pending changes (which |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2633 * may free up space for us). |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2634 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2635 if (ds->ds_phys->ds_used_bytes + inflight >= ds->ds_quota) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2636 if (inflight > 0 || ds->ds_phys->ds_used_bytes < ds->ds_quota) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2637 error = ERESTART; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2638 else |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2639 error = EDQUOT; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2640 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2641 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2642 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2643 return (error); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2644 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2645 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2646 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2647 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2648 dsl_dataset_set_quota_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2649 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2650 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2651 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2652 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2653 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2654 if (spa_version(ds->ds_dir->dd_pool->dp_spa) < SPA_VERSION_REFQUOTA) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2655 return (ENOTSUP); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2656 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2657 if (new_quota == 0) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2658 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2659 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2660 if (new_quota < ds->ds_phys->ds_used_bytes || |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2661 new_quota < ds->ds_reserved) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2662 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2663 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2664 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2665 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2666 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2667 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2668 void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2669 dsl_dataset_set_quota_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2670 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2671 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2672 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2673 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2674 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2675 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2676 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2677 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2678 ds->ds_quota = new_quota; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2679 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2680 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2681 dsl_prop_set_uint64_sync(ds->ds_dir, "refquota", new_quota, cr, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2682 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2683 spa_history_internal_log(LOG_DS_REFQUOTA, ds->ds_dir->dd_pool->dp_spa, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2684 tx, cr, "%lld dataset = %llu ", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2685 (longlong_t)new_quota, ds->ds_dir->dd_phys->dd_head_dataset_obj); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2686 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2687 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2688 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2689 dsl_dataset_set_quota(const char *dsname, uint64_t quota) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2690 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2691 dsl_dataset_t *ds; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2692 int err; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2693 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2694 err = dsl_dataset_open(dsname, DS_MODE_STANDARD, FTAG, &ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2695 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2696 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2697 |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2698 if (quota != ds->ds_quota) { |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2699 /* |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2700 * If someone removes a file, then tries to set the quota, we |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2701 * want to make sure the file freeing takes effect. |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2702 */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2703 txg_wait_open(ds->ds_dir->dd_pool, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2704 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2705 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2706 dsl_dataset_set_quota_check, dsl_dataset_set_quota_sync, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2707 ds, "a, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2708 } |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2709 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2710 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2711 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2712 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2713 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2714 dsl_dataset_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2715 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2716 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2717 uint64_t *reservationp = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2718 uint64_t new_reservation = *reservationp; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2719 int64_t delta; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2720 uint64_t unique; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2721 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2722 if (new_reservation > INT64_MAX) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2723 return (EOVERFLOW); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2724 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2725 if (spa_version(ds->ds_dir->dd_pool->dp_spa) < |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2726 SPA_VERSION_REFRESERVATION) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2727 return (ENOTSUP); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2728 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2729 if (dsl_dataset_is_snapshot(ds)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2730 return (EINVAL); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2731 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2732 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2733 * If we are doing the preliminary check in open context, the |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2734 * space estimates may be inaccurate. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2735 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2736 if (!dmu_tx_is_syncing(tx)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2737 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2738 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2739 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2740 unique = dsl_dataset_unique(ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2741 delta = MAX(unique, new_reservation) - MAX(unique, ds->ds_reserved); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2742 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2743 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2744 if (delta > 0 && |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2745 delta > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2746 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2747 if (delta > 0 && ds->ds_quota > 0 && |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2748 new_reservation > ds->ds_quota) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2749 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2750 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2751 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2752 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2753 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2754 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2755 static void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2756 dsl_dataset_set_reservation_sync(void *arg1, void *arg2, cred_t *cr, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2757 dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2758 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2759 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2760 uint64_t *reservationp = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2761 uint64_t new_reservation = *reservationp; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2762 uint64_t unique; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2763 int64_t delta; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2764 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2765 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2766 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2767 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2768 unique = dsl_dataset_unique(ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2769 delta = MAX(0, (int64_t)(new_reservation - unique)) - |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2770 MAX(0, (int64_t)(ds->ds_reserved - unique)); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2771 ds->ds_reserved = new_reservation; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2772 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2773 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2774 dsl_prop_set_uint64_sync(ds->ds_dir, "refreservation", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2775 new_reservation, cr, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2776 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2777 dsl_dir_diduse_space(ds->ds_dir, delta, 0, 0, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2778 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2779 spa_history_internal_log(LOG_DS_REFRESERV, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2780 ds->ds_dir->dd_pool->dp_spa, tx, cr, "%lld dataset = %llu", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2781 (longlong_t)new_reservation, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2782 ds->ds_dir->dd_phys->dd_head_dataset_obj); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2783 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2784 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2785 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2786 dsl_dataset_set_reservation(const char *dsname, uint64_t reservation) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2787 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2788 dsl_dataset_t *ds; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2789 int err; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2790 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2791 err = dsl_dataset_open(dsname, DS_MODE_STANDARD, FTAG, &ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2792 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2793 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2794 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2795 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2796 dsl_dataset_set_reservation_check, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2797 dsl_dataset_set_reservation_sync, ds, &reservation, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2798 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2799 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2800 } |