Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dsl_dataset.c @ 6689:47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
6695465 divide by zero in txg_sync_thread() under heavy load
| author | maybee |
|---|---|
| date | Thu, 22 May 2008 11:13:47 -0700 |
| parents | 3a34b0dbb107 |
| children | c511f317869e |
| 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 |
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44 static char *dsl_reaper = "the grim reaper"; |
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45 |
| 2199 | 46 static dsl_checkfunc_t dsl_dataset_destroy_begin_check; |
| 47 static dsl_syncfunc_t dsl_dataset_destroy_begin_sync; | |
| 48 static dsl_checkfunc_t dsl_dataset_rollback_check; | |
| 49 static dsl_syncfunc_t dsl_dataset_rollback_sync; | |
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50 static dsl_syncfunc_t dsl_dataset_set_reservation_sync; |
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51 |
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52 #define DS_REF_MAX (1ULL << 62) |
| 789 | 53 |
| 54 #define DSL_DEADLIST_BLOCKSIZE SPA_MAXBLOCKSIZE | |
| 55 | |
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56 #define DSL_DATASET_IS_DESTROYED(ds) ((ds)->ds_owner == dsl_reaper) |
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57 |
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58 static void dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag); |
| 789 | 59 |
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60 /* |
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61 * Figure out how much of this delta should be propogated to the dsl_dir |
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62 * layer. If there's a refreservation, that space has already been |
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63 * partially accounted for in our ancestors. |
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64 */ |
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65 static int64_t |
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66 parent_delta(dsl_dataset_t *ds, int64_t delta) |
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67 { |
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68 uint64_t old_bytes, new_bytes; |
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69 |
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70 if (ds->ds_reserved == 0) |
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71 return (delta); |
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72 |
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73 old_bytes = MAX(ds->ds_phys->ds_unique_bytes, ds->ds_reserved); |
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74 new_bytes = MAX(ds->ds_phys->ds_unique_bytes + delta, ds->ds_reserved); |
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75 |
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76 ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); |
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77 return (new_bytes - old_bytes); |
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78 } |
| 789 | 79 |
| 80 void | |
| 81 dsl_dataset_block_born(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 82 { | |
| 2082 | 83 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
| 789 | 84 int compressed = BP_GET_PSIZE(bp); |
| 85 int uncompressed = BP_GET_UCSIZE(bp); | |
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86 int64_t delta; |
| 789 | 87 |
| 88 dprintf_bp(bp, "born, ds=%p\n", ds); | |
| 89 | |
| 90 ASSERT(dmu_tx_is_syncing(tx)); | |
| 91 /* It could have been compressed away to nothing */ | |
| 92 if (BP_IS_HOLE(bp)) | |
| 93 return; | |
| 94 ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
| 95 ASSERT3U(BP_GET_TYPE(bp), <, DMU_OT_NUMTYPES); | |
| 96 if (ds == NULL) { | |
| 97 /* | |
| 98 * Account for the meta-objset space in its placeholder | |
| 99 * dsl_dir. | |
| 100 */ | |
| 101 ASSERT3U(compressed, ==, uncompressed); /* it's all metadata */ | |
| 102 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
| 103 used, compressed, uncompressed, tx); | |
| 104 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
| 105 return; | |
| 106 } | |
| 107 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 108 mutex_enter(&ds->ds_lock); | |
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109 delta = parent_delta(ds, used); |
| 789 | 110 ds->ds_phys->ds_used_bytes += used; |
| 111 ds->ds_phys->ds_compressed_bytes += compressed; | |
| 112 ds->ds_phys->ds_uncompressed_bytes += uncompressed; | |
| 113 ds->ds_phys->ds_unique_bytes += used; | |
| 114 mutex_exit(&ds->ds_lock); | |
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115 dsl_dir_diduse_space(ds->ds_dir, delta, compressed, uncompressed, tx); |
| 789 | 116 } |
| 117 | |
| 118 void | |
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119 dsl_dataset_block_kill(dsl_dataset_t *ds, blkptr_t *bp, zio_t *pio, |
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120 dmu_tx_t *tx) |
| 789 | 121 { |
| 2082 | 122 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
| 789 | 123 int compressed = BP_GET_PSIZE(bp); |
| 124 int uncompressed = BP_GET_UCSIZE(bp); | |
| 125 | |
| 126 ASSERT(dmu_tx_is_syncing(tx)); | |
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127 /* No block pointer => nothing to free */ |
| 789 | 128 if (BP_IS_HOLE(bp)) |
| 129 return; | |
| 130 | |
| 131 ASSERT(used > 0); | |
| 132 if (ds == NULL) { | |
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133 int err; |
| 789 | 134 /* |
| 135 * Account for the meta-objset space in its placeholder | |
| 136 * dataset. | |
| 137 */ | |
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138 err = arc_free(pio, tx->tx_pool->dp_spa, |
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139 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
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140 ASSERT(err == 0); |
| 789 | 141 |
| 142 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
| 143 -used, -compressed, -uncompressed, tx); | |
| 144 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
| 145 return; | |
| 146 } | |
| 147 ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
| 148 | |
| 149 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 150 | |
| 151 if (bp->blk_birth > ds->ds_phys->ds_prev_snap_txg) { | |
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152 int err; |
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153 int64_t delta; |
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154 |
| 789 | 155 dprintf_bp(bp, "freeing: %s", ""); |
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156 err = arc_free(pio, tx->tx_pool->dp_spa, |
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157 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
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158 ASSERT(err == 0); |
| 789 | 159 |
| 160 mutex_enter(&ds->ds_lock); | |
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161 ASSERT(ds->ds_phys->ds_unique_bytes >= used || |
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162 !DS_UNIQUE_IS_ACCURATE(ds)); |
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163 delta = parent_delta(ds, -used); |
| 789 | 164 ds->ds_phys->ds_unique_bytes -= used; |
| 165 mutex_exit(&ds->ds_lock); | |
| 166 dsl_dir_diduse_space(ds->ds_dir, | |
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167 delta, -compressed, -uncompressed, tx); |
| 789 | 168 } else { |
| 169 dprintf_bp(bp, "putting on dead list: %s", ""); | |
| 1544 | 170 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, bp, tx)); |
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171 ASSERT3U(ds->ds_prev->ds_object, ==, |
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172 ds->ds_phys->ds_prev_snap_obj); |
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173 ASSERT(ds->ds_prev->ds_phys->ds_num_children > 0); |
| 789 | 174 /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
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175 if (ds->ds_prev->ds_phys->ds_next_snap_obj == |
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176 ds->ds_object && bp->blk_birth > |
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177 ds->ds_prev->ds_phys->ds_prev_snap_txg) { |
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178 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
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179 mutex_enter(&ds->ds_prev->ds_lock); |
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180 ds->ds_prev->ds_phys->ds_unique_bytes += used; |
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181 mutex_exit(&ds->ds_prev->ds_lock); |
| 789 | 182 } |
| 183 } | |
| 184 mutex_enter(&ds->ds_lock); | |
| 185 ASSERT3U(ds->ds_phys->ds_used_bytes, >=, used); | |
| 186 ds->ds_phys->ds_used_bytes -= used; | |
| 187 ASSERT3U(ds->ds_phys->ds_compressed_bytes, >=, compressed); | |
| 188 ds->ds_phys->ds_compressed_bytes -= compressed; | |
| 189 ASSERT3U(ds->ds_phys->ds_uncompressed_bytes, >=, uncompressed); | |
| 190 ds->ds_phys->ds_uncompressed_bytes -= uncompressed; | |
| 191 mutex_exit(&ds->ds_lock); | |
| 192 } | |
| 193 | |
| 1544 | 194 uint64_t |
| 195 dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) | |
| 789 | 196 { |
| 2885 | 197 uint64_t trysnap = 0; |
| 198 | |
| 789 | 199 if (ds == NULL) |
| 1544 | 200 return (0); |
| 789 | 201 /* |
| 202 * The snapshot creation could fail, but that would cause an | |
| 203 * incorrect FALSE return, which would only result in an | |
| 204 * overestimation of the amount of space that an operation would | |
| 205 * consume, which is OK. | |
| 206 * | |
| 207 * There's also a small window where we could miss a pending | |
| 208 * snapshot, because we could set the sync task in the quiescing | |
| 209 * phase. So this should only be used as a guess. | |
| 210 */ | |
| 2885 | 211 if (ds->ds_trysnap_txg > |
| 212 spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) | |
| 213 trysnap = ds->ds_trysnap_txg; | |
| 214 return (MAX(ds->ds_phys->ds_prev_snap_txg, trysnap)); | |
| 1544 | 215 } |
| 216 | |
| 217 int | |
| 218 dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth) | |
| 219 { | |
| 220 return (blk_birth > dsl_dataset_prev_snap_txg(ds)); | |
| 789 | 221 } |
| 222 | |
| 223 /* ARGSUSED */ | |
| 224 static void | |
| 225 dsl_dataset_evict(dmu_buf_t *db, void *dsv) | |
| 226 { | |
| 227 dsl_dataset_t *ds = dsv; | |
| 228 | |
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229 ASSERT(ds->ds_owner == NULL || DSL_DATASET_IS_DESTROYED(ds)); |
| 789 | 230 |
| 231 dprintf_ds(ds, "evicting %s\n", ""); | |
| 232 | |
| 4787 | 233 unique_remove(ds->ds_fsid_guid); |
| 789 | 234 |
| 235 if (ds->ds_user_ptr != NULL) | |
| 236 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 237 | |
| 238 if (ds->ds_prev) { | |
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239 dsl_dataset_drop_ref(ds->ds_prev, ds); |
| 789 | 240 ds->ds_prev = NULL; |
| 241 } | |
| 242 | |
| 243 bplist_close(&ds->ds_deadlist); | |
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244 if (ds->ds_dir) |
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245 dsl_dir_close(ds->ds_dir, ds); |
| 789 | 246 |
| 4787 | 247 ASSERT(!list_link_active(&ds->ds_synced_link)); |
| 789 | 248 |
| 2856 | 249 mutex_destroy(&ds->ds_lock); |
| 4787 | 250 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 251 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
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252 rw_destroy(&ds->ds_rwlock); |
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253 cv_destroy(&ds->ds_exclusive_cv); |
| 2856 | 254 |
| 789 | 255 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 256 } | |
| 257 | |
| 1544 | 258 static int |
| 789 | 259 dsl_dataset_get_snapname(dsl_dataset_t *ds) |
| 260 { | |
| 261 dsl_dataset_phys_t *headphys; | |
| 262 int err; | |
| 263 dmu_buf_t *headdbuf; | |
| 264 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 265 objset_t *mos = dp->dp_meta_objset; | |
| 266 | |
| 267 if (ds->ds_snapname[0]) | |
| 1544 | 268 return (0); |
| 789 | 269 if (ds->ds_phys->ds_next_snap_obj == 0) |
| 1544 | 270 return (0); |
| 789 | 271 |
| 1544 | 272 err = dmu_bonus_hold(mos, ds->ds_dir->dd_phys->dd_head_dataset_obj, |
| 273 FTAG, &headdbuf); | |
| 274 if (err) | |
| 275 return (err); | |
| 789 | 276 headphys = headdbuf->db_data; |
| 277 err = zap_value_search(dp->dp_meta_objset, | |
| 4577 | 278 headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); |
| 1544 | 279 dmu_buf_rele(headdbuf, FTAG); |
| 280 return (err); | |
| 789 | 281 } |
| 282 | |
|
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283 static int |
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284 dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) |
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285 { |
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286 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
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287 uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj; |
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288 matchtype_t mt; |
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289 int err; |
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290 |
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291 if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET) |
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292 mt = MT_FIRST; |
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293 else |
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294 mt = MT_EXACT; |
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295 |
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296 err = zap_lookup_norm(mos, snapobj, name, 8, 1, |
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297 value, mt, NULL, 0, NULL); |
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298 if (err == ENOTSUP && mt == MT_FIRST) |
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299 err = zap_lookup(mos, snapobj, name, 8, 1, value); |
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300 return (err); |
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301 } |
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302 |
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303 static int |
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304 dsl_dataset_snap_remove(dsl_dataset_t *ds, char *name, dmu_tx_t *tx) |
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305 { |
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306 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
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307 uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj; |
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308 matchtype_t mt; |
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309 int err; |
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310 |
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311 if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET) |
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312 mt = MT_FIRST; |
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313 else |
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314 mt = MT_EXACT; |
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315 |
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316 err = zap_remove_norm(mos, snapobj, name, mt, tx); |
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317 if (err == ENOTSUP && mt == MT_FIRST) |
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318 err = zap_remove(mos, snapobj, name, tx); |
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319 return (err); |
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320 } |
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321 |
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322 static int |
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323 dsl_dataset_get_ref(dsl_pool_t *dp, uint64_t dsobj, void *tag, |
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324 dsl_dataset_t **dsp) |
| 789 | 325 { |
| 326 objset_t *mos = dp->dp_meta_objset; | |
| 327 dmu_buf_t *dbuf; | |
| 328 dsl_dataset_t *ds; | |
| 1544 | 329 int err; |
| 789 | 330 |
| 331 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || | |
| 332 dsl_pool_sync_context(dp)); | |
| 333 | |
| 1544 | 334 err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); |
| 335 if (err) | |
| 336 return (err); | |
| 789 | 337 ds = dmu_buf_get_user(dbuf); |
| 338 if (ds == NULL) { | |
| 339 dsl_dataset_t *winner; | |
| 340 | |
| 341 ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); | |
| 342 ds->ds_dbuf = dbuf; | |
| 343 ds->ds_object = dsobj; | |
| 344 ds->ds_phys = dbuf->db_data; | |
| 345 | |
| 2856 | 346 mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); |
| 4787 | 347 mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); |
| 2856 | 348 mutex_init(&ds->ds_deadlist.bpl_lock, NULL, MUTEX_DEFAULT, |
| 349 NULL); | |
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350 rw_init(&ds->ds_rwlock, 0, 0, 0); |
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351 cv_init(&ds->ds_exclusive_cv, NULL, CV_DEFAULT, NULL); |
| 2856 | 352 |
| 1544 | 353 err = bplist_open(&ds->ds_deadlist, |
| 789 | 354 mos, ds->ds_phys->ds_deadlist_obj); |
| 1544 | 355 if (err == 0) { |
| 356 err = dsl_dir_open_obj(dp, | |
| 357 ds->ds_phys->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
| 358 } | |
| 359 if (err) { | |
| 360 /* | |
| 361 * we don't really need to close the blist if we | |
| 362 * just opened it. | |
| 363 */ | |
| 2856 | 364 mutex_destroy(&ds->ds_lock); |
| 4787 | 365 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 366 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
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367 rw_destroy(&ds->ds_rwlock); |
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368 cv_destroy(&ds->ds_exclusive_cv); |
| 1544 | 369 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 370 dmu_buf_rele(dbuf, tag); | |
| 371 return (err); | |
| 372 } | |
| 789 | 373 |
| 374 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == dsobj) { | |
| 375 ds->ds_snapname[0] = '\0'; | |
| 376 if (ds->ds_phys->ds_prev_snap_obj) { | |
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377 err = dsl_dataset_get_ref(dp, |
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378 ds->ds_phys->ds_prev_snap_obj, |
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379 ds, &ds->ds_prev); |
| 789 | 380 } |
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381 } else if (zfs_flags & ZFS_DEBUG_SNAPNAMES) { |
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382 err = dsl_dataset_get_snapname(ds); |
| 789 | 383 } |
| 384 | |
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385 if (!dsl_dataset_is_snapshot(ds)) { |
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386 /* |
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387 * In sync context, we're called with either no lock |
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388 * or with the write lock. If we're not syncing, |
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389 * we're always called with the read lock held. |
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390 */ |
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391 boolean_t need_lock = |
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392 !RW_WRITE_HELD(&dp->dp_config_rwlock) && |
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393 dsl_pool_sync_context(dp); |
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394 |
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395 if (need_lock) |
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396 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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397 |
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398 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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399 "refreservation", sizeof (uint64_t), 1, |
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400 &ds->ds_reserved, NULL); |
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401 if (err == 0) { |
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402 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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403 "refquota", sizeof (uint64_t), 1, |
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404 &ds->ds_quota, NULL); |
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405 } |
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406 |
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407 if (need_lock) |
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408 rw_exit(&dp->dp_config_rwlock); |
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409 } else { |
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410 ds->ds_reserved = ds->ds_quota = 0; |
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411 } |
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412 |
| 1544 | 413 if (err == 0) { |
| 414 winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys, | |
| 415 dsl_dataset_evict); | |
| 416 } | |
| 417 if (err || winner) { | |
| 789 | 418 bplist_close(&ds->ds_deadlist); |
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419 if (ds->ds_prev) |
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420 dsl_dataset_drop_ref(ds->ds_prev, ds); |
| 789 | 421 dsl_dir_close(ds->ds_dir, ds); |
| 2856 | 422 mutex_destroy(&ds->ds_lock); |
| 4787 | 423 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 424 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
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425 rw_destroy(&ds->ds_rwlock); |
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426 cv_destroy(&ds->ds_exclusive_cv); |
| 789 | 427 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 1544 | 428 if (err) { |
| 429 dmu_buf_rele(dbuf, tag); | |
| 430 return (err); | |
| 431 } | |
| 789 | 432 ds = winner; |
| 433 } else { | |
| 4787 | 434 ds->ds_fsid_guid = |
| 789 | 435 unique_insert(ds->ds_phys->ds_fsid_guid); |
| 436 } | |
| 437 } | |
| 438 ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
| 439 ASSERT3P(ds->ds_phys, ==, dbuf->db_data); | |
| 440 mutex_enter(&ds->ds_lock); | |
|
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441 if (!dsl_pool_sync_context(dp) && DSL_DATASET_IS_DESTROYED(ds)) { |
| 789 | 442 mutex_exit(&ds->ds_lock); |
|
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443 dmu_buf_rele(ds->ds_dbuf, tag); |
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444 return (ENOENT); |
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445 } |
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446 mutex_exit(&ds->ds_lock); |
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447 *dsp = ds; |
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448 return (0); |
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449 } |
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450 |
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451 static int |
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452 dsl_dataset_hold_ref(dsl_dataset_t *ds, void *tag) |
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453 { |
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454 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
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455 |
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456 /* |
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457 * In syncing context we don't want the rwlock lock: there |
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458 * may be an existing writer waiting for sync phase to |
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459 * finish. We don't need to worry about such writers, since |
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460 * sync phase is single-threaded, so the writer can't be |
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461 * doing anything while we are active. |
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462 */ |
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463 if (dsl_pool_sync_context(dp)) { |
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464 ASSERT(!DSL_DATASET_IS_DESTROYED(ds)); |
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465 return (0); |
| 789 | 466 } |
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467 |
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468 /* |
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469 * Normal users will hold the ds_rwlock as a READER until they |
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470 * are finished (i.e., call dsl_dataset_rele()). "Owners" will |
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471 * drop their READER lock after they set the ds_owner field. |
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472 * |
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473 * If the dataset is being destroyed, the destroy thread will |
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474 * obtain a WRITER lock for exclusive access after it's done its |
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475 * open-context work and then change the ds_owner to |
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476 * dsl_reaper once destruction is assured. So threads |
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477 * may block here temporarily, until the "destructability" of |
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478 * the dataset is determined. |
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479 */ |
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480 ASSERT(!RW_WRITE_HELD(&dp->dp_config_rwlock)); |
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481 mutex_enter(&ds->ds_lock); |
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482 while (!rw_tryenter(&ds->ds_rwlock, RW_READER)) { |
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483 rw_exit(&dp->dp_config_rwlock); |
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484 cv_wait(&ds->ds_exclusive_cv, &ds->ds_lock); |
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485 if (DSL_DATASET_IS_DESTROYED(ds)) { |
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486 mutex_exit(&ds->ds_lock); |
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487 dsl_dataset_drop_ref(ds, tag); |
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488 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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489 return (ENOENT); |
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490 } |
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491 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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492 } |
| 789 | 493 mutex_exit(&ds->ds_lock); |
| 1544 | 494 return (0); |
| 789 | 495 } |
| 496 | |
| 497 int | |
|
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498 dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, |
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499 dsl_dataset_t **dsp) |
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500 { |
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501 int err = dsl_dataset_get_ref(dp, dsobj, tag, dsp); |
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502 |
|
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503 if (err) |
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504 return (err); |
|
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505 return (dsl_dataset_hold_ref(*dsp, tag)); |
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506 } |
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|
507 |
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508 int |
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509 dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, int flags, void *owner, |
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510 dsl_dataset_t **dsp) |
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511 { |
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512 int err = dsl_dataset_hold_obj(dp, dsobj, owner, dsp); |
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513 |
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514 ASSERT(DS_MODE_TYPE(flags) != DS_MODE_USER); |
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515 |
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516 if (err) |
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517 return (err); |
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518 if (!dsl_dataset_tryown(*dsp, DS_MODE_IS_INCONSISTENT(flags), owner)) { |
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519 dsl_dataset_rele(*dsp, owner); |
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520 return (EBUSY); |
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|
521 } |
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522 return (0); |
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|
523 } |
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|
524 |
|
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525 int |
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|
526 dsl_dataset_hold(const char *name, void *tag, dsl_dataset_t **dsp) |
| 789 | 527 { |
| 528 dsl_dir_t *dd; | |
| 529 dsl_pool_t *dp; | |
|
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530 const char *snapname; |
| 789 | 531 uint64_t obj; |
| 532 int err = 0; | |
| 533 | |
|
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534 err = dsl_dir_open_spa(NULL, name, FTAG, &dd, &snapname); |
| 1544 | 535 if (err) |
| 536 return (err); | |
| 789 | 537 |
| 538 dp = dd->dd_pool; | |
| 539 obj = dd->dd_phys->dd_head_dataset_obj; | |
| 540 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
|
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|
541 if (obj) |
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542 err = dsl_dataset_get_ref(dp, obj, tag, dsp); |
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543 else |
| 789 | 544 err = ENOENT; |
|
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|
545 if (err) |
| 789 | 546 goto out; |
|
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|
547 |
|
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548 err = dsl_dataset_hold_ref(*dsp, tag); |
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|
549 |
|
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|
550 /* we may be looking for a snapshot */ |
|
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551 if (err == 0 && snapname != NULL) { |
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|
552 dsl_dataset_t *ds = NULL; |
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|
553 |
|
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|
554 if (*snapname++ != '@') { |
|
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|
555 dsl_dataset_rele(*dsp, tag); |
| 789 | 556 err = ENOENT; |
| 557 goto out; | |
| 558 } | |
|
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|
559 |
|
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|
560 dprintf("looking for snapshot '%s'\n", snapname); |
|
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|
561 err = dsl_dataset_snap_lookup(*dsp, snapname, &obj); |
|
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|
562 if (err == 0) |
|
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|
563 err = dsl_dataset_get_ref(dp, obj, tag, &ds); |
|
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|
564 dsl_dataset_rele(*dsp, tag); |
|
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|
565 |
|
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|
566 ASSERT3U((err == 0), ==, (ds != NULL)); |
|
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|
567 |
|
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|
568 if (ds) { |
|
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|
569 mutex_enter(&ds->ds_lock); |
|
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|
570 if (ds->ds_snapname[0] == 0) |
|
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|
571 (void) strlcpy(ds->ds_snapname, snapname, |
|
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|
572 sizeof (ds->ds_snapname)); |
|
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|
573 mutex_exit(&ds->ds_lock); |
|
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|
574 err = dsl_dataset_hold_ref(ds, tag); |
|
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|
575 *dsp = err ? NULL : ds; |
| 789 | 576 } |
| 577 } | |
| 578 out: | |
| 579 rw_exit(&dp->dp_config_rwlock); | |
| 580 dsl_dir_close(dd, FTAG); | |
| 581 return (err); | |
| 582 } | |
| 583 | |
| 584 int | |
|
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585 dsl_dataset_own(const char *name, int flags, void *owner, dsl_dataset_t **dsp) |
| 789 | 586 { |
|
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587 int err = dsl_dataset_hold(name, owner, dsp); |
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588 if (err) |
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589 return (err); |
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590 if ((*dsp)->ds_phys->ds_num_children > 0 && |
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591 !DS_MODE_IS_READONLY(flags)) { |
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592 dsl_dataset_rele(*dsp, owner); |
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593 return (EROFS); |
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594 } |
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595 if (!dsl_dataset_tryown(*dsp, DS_MODE_IS_INCONSISTENT(flags), owner)) { |
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596 dsl_dataset_rele(*dsp, owner); |
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597 return (EBUSY); |
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598 } |
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599 return (0); |
| 789 | 600 } |
| 601 | |
| 602 void | |
| 603 dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
| 604 { | |
| 605 if (ds == NULL) { | |
| 606 (void) strcpy(name, "mos"); | |
| 607 } else { | |
| 608 dsl_dir_name(ds->ds_dir, name); | |
| 1544 | 609 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 610 if (ds->ds_snapname[0]) { |
| 611 (void) strcat(name, "@"); | |
|
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612 /* |
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613 * We use a "recursive" mutex so that we |
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614 * can call dprintf_ds() with ds_lock held. |
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615 */ |
| 789 | 616 if (!MUTEX_HELD(&ds->ds_lock)) { |
| 617 mutex_enter(&ds->ds_lock); | |
| 618 (void) strcat(name, ds->ds_snapname); | |
| 619 mutex_exit(&ds->ds_lock); | |
| 620 } else { | |
| 621 (void) strcat(name, ds->ds_snapname); | |
| 622 } | |
| 623 } | |
| 624 } | |
| 625 } | |
| 626 | |
|
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627 static int |
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628 dsl_dataset_namelen(dsl_dataset_t *ds) |
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629 { |
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630 int result; |
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631 |
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632 if (ds == NULL) { |
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633 result = 3; /* "mos" */ |
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634 } else { |
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635 result = dsl_dir_namelen(ds->ds_dir); |
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636 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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637 if (ds->ds_snapname[0]) { |
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638 ++result; /* adding one for the @-sign */ |
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639 if (!MUTEX_HELD(&ds->ds_lock)) { |
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640 mutex_enter(&ds->ds_lock); |
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641 result += strlen(ds->ds_snapname); |
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642 mutex_exit(&ds->ds_lock); |
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|
643 } else { |
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644 result += strlen(ds->ds_snapname); |
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|
645 } |
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|
646 } |
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647 } |
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|
648 |
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649 return (result); |
|
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650 } |
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651 |
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652 static void |
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653 dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag) |
| 789 | 654 { |
| 1544 | 655 dmu_buf_rele(ds->ds_dbuf, tag); |
| 789 | 656 } |
| 657 | |
| 658 void | |
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659 dsl_dataset_rele(dsl_dataset_t *ds, void *tag) |
| 5367 | 660 { |
|
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661 ASSERT(ds->ds_owner != tag); |
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662 if (!dsl_pool_sync_context(ds->ds_dir->dd_pool)) { |
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663 rw_exit(&ds->ds_rwlock); |
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664 } |
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665 dsl_dataset_drop_ref(ds, tag); |
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666 } |
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667 |
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668 void |
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669 dsl_dataset_disown(dsl_dataset_t *ds, void *owner) |
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670 { |
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671 ASSERT((ds->ds_owner == owner && ds->ds_dbuf) || |
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672 (DSL_DATASET_IS_DESTROYED(ds) && ds->ds_dbuf == NULL)); |
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673 |
| 5367 | 674 mutex_enter(&ds->ds_lock); |
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675 ds->ds_owner = NULL; |
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676 if (RW_WRITE_HELD(&ds->ds_rwlock)) { |
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677 rw_exit(&ds->ds_rwlock); |
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678 cv_broadcast(&ds->ds_exclusive_cv); |
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679 } |
| 5367 | 680 mutex_exit(&ds->ds_lock); |
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681 if (ds->ds_dbuf) |
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682 dsl_dataset_drop_ref(ds, owner); |
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683 else |
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684 dsl_dataset_evict(ds->ds_dbuf, ds); |
| 5367 | 685 } |
| 686 | |
| 687 boolean_t | |
|
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688 dsl_dataset_tryown(dsl_dataset_t *ds, boolean_t inconsistentok, void *owner) |
| 5367 | 689 { |
|
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690 boolean_t gotit = FALSE; |
|
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|
691 |
| 5367 | 692 mutex_enter(&ds->ds_lock); |
|
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693 if (ds->ds_owner == NULL && |
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694 (!DS_IS_INCONSISTENT(ds) || inconsistentok)) { |
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695 ds->ds_owner = owner; |
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696 if (!dsl_pool_sync_context(ds->ds_dir->dd_pool)) |
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697 rw_exit(&ds->ds_rwlock); |
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698 gotit = TRUE; |
| 5367 | 699 } |
| 700 mutex_exit(&ds->ds_lock); | |
|
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701 return (gotit); |
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702 } |
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703 |
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704 void |
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705 dsl_dataset_make_exclusive(dsl_dataset_t *ds, void *owner) |
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706 { |
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707 ASSERT3P(owner, ==, ds->ds_owner); |
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708 if (!RW_WRITE_HELD(&ds->ds_rwlock)) |
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|
709 rw_enter(&ds->ds_rwlock, RW_WRITER); |
| 5367 | 710 } |
| 711 | |
| 712 void | |
| 789 | 713 dsl_dataset_create_root(dsl_pool_t *dp, uint64_t *ddobjp, dmu_tx_t *tx) |
| 714 { | |
| 715 objset_t *mos = dp->dp_meta_objset; | |
| 716 dmu_buf_t *dbuf; | |
| 717 dsl_dataset_phys_t *dsphys; | |
| 718 dsl_dataset_t *ds; | |
| 719 uint64_t dsobj; | |
| 720 dsl_dir_t *dd; | |
| 721 | |
| 722 dsl_dir_create_root(mos, ddobjp, tx); | |
| 1544 | 723 VERIFY(0 == dsl_dir_open_obj(dp, *ddobjp, NULL, FTAG, &dd)); |
| 789 | 724 |
|
928
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725 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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726 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 727 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 728 dmu_buf_will_dirty(dbuf, tx); |
| 729 dsphys = dbuf->db_data; | |
| 730 dsphys->ds_dir_obj = dd->dd_object; | |
| 731 dsphys->ds_fsid_guid = unique_create(); | |
| 732 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 733 sizeof (dsphys->ds_guid)); | |
| 734 dsphys->ds_snapnames_zapobj = | |
|
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735 zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, |
|
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|
736 DMU_OT_NONE, 0, tx); |
| 789 | 737 dsphys->ds_creation_time = gethrestime_sec(); |
| 738 dsphys->ds_creation_txg = tx->tx_txg; | |
| 739 dsphys->ds_deadlist_obj = | |
| 740 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
|
5378
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741 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
|
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|
742 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 1544 | 743 dmu_buf_rele(dbuf, FTAG); |
| 789 | 744 |
| 745 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 746 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 747 dsl_dir_close(dd, FTAG); | |
| 748 | |
|
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749 VERIFY(0 == dsl_dataset_get_ref(dp, dsobj, FTAG, &ds)); |
|
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750 (void) dmu_objset_create_impl(dp->dp_spa, ds, |
|
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751 &ds->ds_phys->ds_bp, DMU_OST_ZFS, tx); |
|
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752 dsl_dataset_drop_ref(ds, FTAG); |
| 789 | 753 } |
| 754 | |
| 2199 | 755 uint64_t |
|
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756 dsl_dataset_create_sync_impl(dsl_dir_t *dd, dsl_dataset_t *origin, |
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757 uint64_t flags, dmu_tx_t *tx) |
| 789 | 758 { |
| 5367 | 759 dsl_pool_t *dp = dd->dd_pool; |
| 789 | 760 dmu_buf_t *dbuf; |
| 761 dsl_dataset_phys_t *dsphys; | |
| 5367 | 762 uint64_t dsobj; |
| 789 | 763 objset_t *mos = dp->dp_meta_objset; |
| 764 | |
| 5367 | 765 ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
| 766 ASSERT(origin == NULL || origin->ds_phys->ds_num_children > 0); | |
| 789 | 767 ASSERT(dmu_tx_is_syncing(tx)); |
| 5367 | 768 ASSERT(dd->dd_phys->dd_head_dataset_obj == 0); |
| 789 | 769 |
|
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770 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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|
771 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 772 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 773 dmu_buf_will_dirty(dbuf, tx); |
| 774 dsphys = dbuf->db_data; | |
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775 bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
| 789 | 776 dsphys->ds_dir_obj = dd->dd_object; |
|
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777 dsphys->ds_flags = flags; |
| 789 | 778 dsphys->ds_fsid_guid = unique_create(); |
| 779 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 780 sizeof (dsphys->ds_guid)); | |
| 781 dsphys->ds_snapnames_zapobj = | |
|
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782 zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, |
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783 DMU_OT_NONE, 0, tx); |
| 789 | 784 dsphys->ds_creation_time = gethrestime_sec(); |
| 785 dsphys->ds_creation_txg = tx->tx_txg; | |
| 786 dsphys->ds_deadlist_obj = | |
| 787 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
|
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788 |
| 5367 | 789 if (origin) { |
| 790 dsphys->ds_prev_snap_obj = origin->ds_object; | |
| 789 | 791 dsphys->ds_prev_snap_txg = |
| 5367 | 792 origin->ds_phys->ds_creation_txg; |
| 789 | 793 dsphys->ds_used_bytes = |
| 5367 | 794 origin->ds_phys->ds_used_bytes; |
| 789 | 795 dsphys->ds_compressed_bytes = |
| 5367 | 796 origin->ds_phys->ds_compressed_bytes; |
| 789 | 797 dsphys->ds_uncompressed_bytes = |
| 5367 | 798 origin->ds_phys->ds_uncompressed_bytes; |
| 799 dsphys->ds_bp = origin->ds_phys->ds_bp; | |
|
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800 dsphys->ds_flags |= origin->ds_phys->ds_flags; |
| 789 | 801 |
| 5367 | 802 dmu_buf_will_dirty(origin->ds_dbuf, tx); |
| 803 origin->ds_phys->ds_num_children++; | |
| 789 | 804 |
| 805 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 5367 | 806 dd->dd_phys->dd_origin_obj = origin->ds_object; |
| 789 | 807 } |
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808 |
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809 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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810 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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|
811 |
| 1544 | 812 dmu_buf_rele(dbuf, FTAG); |
| 789 | 813 |
| 814 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 815 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 5367 | 816 |
| 817 return (dsobj); | |
| 818 } | |
| 819 | |
| 820 uint64_t | |
|
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821 dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, |
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822 dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) |
| 5367 | 823 { |
| 824 dsl_pool_t *dp = pdd->dd_pool; | |
| 825 uint64_t dsobj, ddobj; | |
| 826 dsl_dir_t *dd; | |
| 827 | |
| 828 ASSERT(lastname[0] != '@'); | |
| 829 | |
| 830 ddobj = dsl_dir_create_sync(pdd, lastname, tx); | |
| 831 VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd)); | |
| 832 | |
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|
833 dsobj = dsl_dataset_create_sync_impl(dd, origin, flags, tx); |
| 5367 | 834 |
| 835 dsl_deleg_set_create_perms(dd, tx, cr); | |
| 836 | |
| 789 | 837 dsl_dir_close(dd, FTAG); |
| 838 | |
| 2199 | 839 return (dsobj); |
| 840 } | |
| 841 | |
| 842 struct destroyarg { | |
| 843 dsl_sync_task_group_t *dstg; | |
| 844 char *snapname; | |
| 845 char *failed; | |
| 846 }; | |
| 847 | |
| 848 static int | |
| 849 dsl_snapshot_destroy_one(char *name, void *arg) | |
| 850 { | |
| 851 struct destroyarg *da = arg; | |
| 852 dsl_dataset_t *ds; | |
| 853 char *cp; | |
| 854 int err; | |
| 855 | |
| 856 (void) strcat(name, "@"); | |
| 857 (void) strcat(name, da->snapname); | |
|
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858 err = dsl_dataset_own(name, DS_MODE_READONLY | DS_MODE_INCONSISTENT, |
| 4007 | 859 da->dstg, &ds); |
| 2199 | 860 cp = strchr(name, '@'); |
| 861 *cp = '\0'; | |
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862 if (err == 0) { |
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863 dsl_dataset_make_exclusive(ds, da->dstg); |
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864 dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check, |
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865 dsl_dataset_destroy_sync, ds, da->dstg, 0); |
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866 } else if (err == ENOENT) { |
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867 err = 0; |
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|
868 } else { |
| 2199 | 869 (void) strcpy(da->failed, name); |
| 870 } | |
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871 return (err); |
| 789 | 872 } |
| 873 | |
| 2199 | 874 /* |
| 875 * Destroy 'snapname' in all descendants of 'fsname'. | |
| 876 */ | |
| 877 #pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy | |
| 878 int | |
| 879 dsl_snapshots_destroy(char *fsname, char *snapname) | |
| 880 { | |
| 881 int err; | |
| 882 struct destroyarg da; | |
| 883 dsl_sync_task_t *dst; | |
| 884 spa_t *spa; | |
| 885 | |
|
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|
886 err = spa_open(fsname, &spa, FTAG); |
| 2199 | 887 if (err) |
| 888 return (err); | |
| 889 da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); | |
| 890 da.snapname = snapname; | |
| 891 da.failed = fsname; | |
| 892 | |
| 893 err = dmu_objset_find(fsname, | |
| 2417 | 894 dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN); |
| 2199 | 895 |
| 896 if (err == 0) | |
| 897 err = dsl_sync_task_group_wait(da.dstg); | |
| 898 | |
| 899 for (dst = list_head(&da.dstg->dstg_tasks); dst; | |
| 900 dst = list_next(&da.dstg->dstg_tasks, dst)) { | |
| 901 dsl_dataset_t *ds = dst->dst_arg1; | |
|
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902 /* |
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903 * Return the file system name that triggered the error |
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|
904 */ |
| 2199 | 905 if (dst->dst_err) { |
| 906 dsl_dataset_name(ds, fsname); | |
|
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907 *strchr(fsname, '@') = '\0'; |
| 2199 | 908 } |
|
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|
909 dsl_dataset_disown(ds, da.dstg); |
| 2199 | 910 } |
| 911 | |
| 912 dsl_sync_task_group_destroy(da.dstg); | |
| 913 spa_close(spa, FTAG); | |
| 914 return (err); | |
| 915 } | |
| 916 | |
| 5367 | 917 /* |
|
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918 * ds must be opened as OWNER. On return (whether successful or not), |
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919 * ds will be closed and caller can no longer dereference it. |
| 5367 | 920 */ |
| 789 | 921 int |
| 5367 | 922 dsl_dataset_destroy(dsl_dataset_t *ds, void *tag) |
| 789 | 923 { |
| 924 int err; | |
| 2199 | 925 dsl_sync_task_group_t *dstg; |
| 926 objset_t *os; | |
| 789 | 927 dsl_dir_t *dd; |
| 2199 | 928 uint64_t obj; |
| 929 | |
| 5367 | 930 if (dsl_dataset_is_snapshot(ds)) { |
| 2199 | 931 /* Destroying a snapshot is simpler */ |
|
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|
932 dsl_dataset_make_exclusive(ds, tag); |
| 2199 | 933 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 934 dsl_dataset_destroy_check, dsl_dataset_destroy_sync, | |
| 5367 | 935 ds, tag, 0); |
| 936 goto out; | |
| 2199 | 937 } |
| 938 | |
| 939 dd = ds->ds_dir; | |
| 789 | 940 |
| 2199 | 941 /* |
| 942 * Check for errors and mark this ds as inconsistent, in | |
| 943 * case we crash while freeing the objects. | |
| 944 */ | |
| 945 err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check, | |
| 946 dsl_dataset_destroy_begin_sync, ds, NULL, 0); | |
| 5367 | 947 if (err) |
| 948 goto out; | |
| 949 | |
| 950 err = dmu_objset_open_ds(ds, DMU_OST_ANY, &os); | |
| 951 if (err) | |
| 952 goto out; | |
| 2199 | 953 |
| 954 /* | |
| 955 * remove the objects in open context, so that we won't | |
| 956 * have too much to do in syncing context. | |
| 957 */ | |
|
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|
958 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, |
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|
959 ds->ds_phys->ds_prev_snap_txg)) { |
| 2199 | 960 dmu_tx_t *tx = dmu_tx_create(os); |
| 961 dmu_tx_hold_free(tx, obj, 0, DMU_OBJECT_END); | |
| 962 dmu_tx_hold_bonus(tx, obj); | |
| 963 err = dmu_tx_assign(tx, TXG_WAIT); | |
| 964 if (err) { | |
| 965 /* | |
| 966 * Perhaps there is not enough disk | |
| 967 * space. Just deal with it from | |
| 968 * dsl_dataset_destroy_sync(). | |
| 969 */ | |
| 970 dmu_tx_abort(tx); | |
| 971 continue; | |
| 972 } | |
| 973 VERIFY(0 == dmu_object_free(os, obj, tx)); | |
| 974 dmu_tx_commit(tx); | |
| 975 } | |
| 976 | |
| 977 dmu_objset_close(os); | |
| 978 if (err != ESRCH) | |
| 5367 | 979 goto out; |
| 2199 | 980 |
| 5367 | 981 if (ds->ds_user_ptr) { |
|
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982 /* |
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983 * We need to sync out all in-flight IO before we try |
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984 * to evict (the dataset evict func is trying to clear |
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985 * the cached entries for this dataset in the ARC). |
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|
986 */ |
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|
987 txg_wait_synced(dd->dd_pool, 0); |
| 5367 | 988 ds->ds_user_evict_func(ds, ds->ds_user_ptr); |
| 989 ds->ds_user_ptr = NULL; | |
| 990 } | |
| 991 | |
| 992 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); | |
| 993 err = dsl_dir_open_obj(dd->dd_pool, dd->dd_object, NULL, FTAG, &dd); | |
| 994 rw_exit(&dd->dd_pool->dp_config_rwlock); | |
| 995 | |
| 1544 | 996 if (err) |
| 5367 | 997 goto out; |
| 789 | 998 |
| 2199 | 999 /* |
| 1000 * Blow away the dsl_dir + head dataset. | |
| 1001 */ | |
|
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|
1002 dsl_dataset_make_exclusive(ds, tag); |
| 2199 | 1003 dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool); |
| 1004 dsl_sync_task_create(dstg, dsl_dataset_destroy_check, | |
| 5367 | 1005 dsl_dataset_destroy_sync, ds, tag, 0); |
| 2199 | 1006 dsl_sync_task_create(dstg, dsl_dir_destroy_check, |
| 1007 dsl_dir_destroy_sync, dd, FTAG, 0); | |
| 1008 err = dsl_sync_task_group_wait(dstg); | |
| 1009 dsl_sync_task_group_destroy(dstg); | |
|
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|
1010 /* if it is successful, dsl_dir_destroy_sync will close the dd */ |
| 5367 | 1011 if (err) |
| 2199 | 1012 dsl_dir_close(dd, FTAG); |
| 5367 | 1013 out: |
|
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|
1014 dsl_dataset_disown(ds, tag); |
| 789 | 1015 return (err); |
| 1016 } | |
| 1017 | |
| 1018 int | |
| 5367 | 1019 dsl_dataset_rollback(dsl_dataset_t *ds, dmu_objset_type_t ost) |
| 789 | 1020 { |
|
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1021 ASSERT(ds->ds_owner); |
| 5367 | 1022 |
| 2199 | 1023 return (dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 1024 dsl_dataset_rollback_check, dsl_dataset_rollback_sync, | |
| 5367 | 1025 ds, &ost, 0)); |
| 789 | 1026 } |
| 1027 | |
| 1028 void * | |
| 1029 dsl_dataset_set_user_ptr(dsl_dataset_t *ds, | |
| 1030 void *p, dsl_dataset_evict_func_t func) | |
| 1031 { | |
| 1032 void *old; | |
| 1033 | |
| 1034 mutex_enter(&ds->ds_lock); | |
| 1035 old = ds->ds_user_ptr; | |
| 1036 if (old == NULL) { | |
| 1037 ds->ds_user_ptr = p; | |
| 1038 ds->ds_user_evict_func = func; | |
| 1039 } | |
| 1040 mutex_exit(&ds->ds_lock); | |
| 1041 return (old); | |
| 1042 } | |
| 1043 | |
| 1044 void * | |
| 1045 dsl_dataset_get_user_ptr(dsl_dataset_t *ds) | |
| 1046 { | |
| 1047 return (ds->ds_user_ptr); | |
| 1048 } | |
| 1049 | |
| 1050 | |
|
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1051 blkptr_t * |
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1052 dsl_dataset_get_blkptr(dsl_dataset_t *ds) |
| 789 | 1053 { |
|
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1054 return (&ds->ds_phys->ds_bp); |
| 789 | 1055 } |
| 1056 | |
| 1057 void | |
| 1058 dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 1059 { | |
| 1060 ASSERT(dmu_tx_is_syncing(tx)); | |
| 1061 /* If it's the meta-objset, set dp_meta_rootbp */ | |
| 1062 if (ds == NULL) { | |
| 1063 tx->tx_pool->dp_meta_rootbp = *bp; | |
| 1064 } else { | |
| 1065 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1066 ds->ds_phys->ds_bp = *bp; | |
| 1067 } | |
| 1068 } | |
| 1069 | |
| 1070 spa_t * | |
| 1071 dsl_dataset_get_spa(dsl_dataset_t *ds) | |
| 1072 { | |
| 1073 return (ds->ds_dir->dd_pool->dp_spa); | |
| 1074 } | |
| 1075 | |
| 1076 void | |
| 1077 dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
| 1078 { | |
| 1079 dsl_pool_t *dp; | |
| 1080 | |
| 1081 if (ds == NULL) /* this is the meta-objset */ | |
| 1082 return; | |
| 1083 | |
| 1084 ASSERT(ds->ds_user_ptr != NULL); | |
| 2885 | 1085 |
| 1086 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 1087 panic("dirtying snapshot!"); | |
| 789 | 1088 |
| 1089 dp = ds->ds_dir->dd_pool; | |
| 1090 | |
| 1091 if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) { | |
| 1092 /* up the hold count until we can be written out */ | |
| 1093 dmu_buf_add_ref(ds->ds_dbuf, ds); | |
| 1094 } | |
| 1095 } | |
| 1096 | |
|
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1097 /* |
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1098 * The unique space in the head dataset can be calculated by subtracting |
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1099 * the space used in the most recent snapshot, that is still being used |
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1100 * in this file system, from the space currently in use. To figure out |
|
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1101 * the space in the most recent snapshot still in use, we need to take |
|
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1102 * the total space used in the snapshot and subtract out the space that |
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1103 * has been freed up since the snapshot was taken. |
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1104 */ |
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1105 static void |
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1106 dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) |
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1107 { |
|
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1108 uint64_t mrs_used; |
|
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1109 uint64_t dlused, dlcomp, dluncomp; |
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1110 |
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1111 ASSERT(ds->ds_object == ds->ds_dir->dd_phys->dd_head_dataset_obj); |
|
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1112 |
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1113 if (ds->ds_phys->ds_prev_snap_obj != 0) |
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1114 mrs_used = ds->ds_prev->ds_phys->ds_used_bytes; |
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1115 else |
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1116 mrs_used = 0; |
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1117 |
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1118 VERIFY(0 == bplist_space(&ds->ds_deadlist, &dlused, &dlcomp, |
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1119 &dluncomp)); |
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1120 |
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1121 ASSERT3U(dlused, <=, mrs_used); |
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1122 ds->ds_phys->ds_unique_bytes = |
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1123 ds->ds_phys->ds_used_bytes - (mrs_used - dlused); |
|
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1124 |
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1125 if (!DS_UNIQUE_IS_ACCURATE(ds) && |
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1126 spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
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1127 SPA_VERSION_UNIQUE_ACCURATE) |
|
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1128 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
|
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1129 } |
|
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1130 |
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1131 static uint64_t |
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1132 dsl_dataset_unique(dsl_dataset_t *ds) |
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1133 { |
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1134 if (!DS_UNIQUE_IS_ACCURATE(ds) && !dsl_dataset_is_snapshot(ds)) |
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1135 dsl_dataset_recalc_head_uniq(ds); |
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1136 |
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1137 return (ds->ds_phys->ds_unique_bytes); |
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1138 } |
|
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1139 |
| 789 | 1140 struct killarg { |
|
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1141 int64_t *usedp; |
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1142 int64_t *compressedp; |
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1143 int64_t *uncompressedp; |
| 789 | 1144 zio_t *zio; |
| 1145 dmu_tx_t *tx; | |
| 1146 }; | |
| 1147 | |
| 1148 static int | |
| 1149 kill_blkptr(traverse_blk_cache_t *bc, spa_t *spa, void *arg) | |
| 1150 { | |
| 1151 struct killarg *ka = arg; | |
| 1152 blkptr_t *bp = &bc->bc_blkptr; | |
| 1153 | |
| 1154 ASSERT3U(bc->bc_errno, ==, 0); | |
| 1155 | |
| 1156 /* | |
| 1157 * Since this callback is not called concurrently, no lock is | |
| 1158 * needed on the accounting values. | |
| 1159 */ | |
| 2082 | 1160 *ka->usedp += bp_get_dasize(spa, bp); |
| 789 | 1161 *ka->compressedp += BP_GET_PSIZE(bp); |
| 1162 *ka->uncompressedp += BP_GET_UCSIZE(bp); | |
| 1163 /* XXX check for EIO? */ | |
| 1164 (void) arc_free(ka->zio, spa, ka->tx->tx_txg, bp, NULL, NULL, | |
| 1165 ARC_NOWAIT); | |
| 1166 return (0); | |
| 1167 } | |
| 1168 | |
| 1169 /* ARGSUSED */ | |
| 2199 | 1170 static int |
| 1171 dsl_dataset_rollback_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 789 | 1172 { |
| 2199 | 1173 dsl_dataset_t *ds = arg1; |
| 5367 | 1174 dmu_objset_type_t *ost = arg2; |
| 789 | 1175 |
| 2199 | 1176 /* |
| 5367 | 1177 * We can only roll back to emptyness if it is a ZPL objset. |
| 2199 | 1178 */ |
| 5367 | 1179 if (*ost != DMU_OST_ZFS && ds->ds_phys->ds_prev_snap_txg == 0) |
| 789 | 1180 return (EINVAL); |
| 1181 | |
| 2199 | 1182 /* |
| 1183 * This must not be a snapshot. | |
| 1184 */ | |
| 1185 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 1186 return (EINVAL); | |
| 789 | 1187 |
| 1188 /* | |
| 1189 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1190 * them. Try again. | |
| 1191 */ | |
| 2199 | 1192 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1193 return (EAGAIN); |
| 2199 | 1194 |
| 1195 return (0); | |
| 1196 } | |
| 789 | 1197 |
| 2199 | 1198 /* ARGSUSED */ |
| 1199 static void | |
| 4543 | 1200 dsl_dataset_rollback_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1201 { |
| 1202 dsl_dataset_t *ds = arg1; | |
| 5367 | 1203 dmu_objset_type_t *ost = arg2; |
| 2199 | 1204 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 789 | 1205 |
| 1206 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1207 | |
|
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1208 /* |
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1209 * Before the roll back destroy the zil. |
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1210 */ |
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1211 if (ds->ds_user_ptr != NULL) { |
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1212 zil_rollback_destroy( |
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1213 ((objset_impl_t *)ds->ds_user_ptr)->os_zil, tx); |
| 5367 | 1214 |
| 1215 /* | |
| 1216 * We need to make sure that the objset_impl_t is reopened after | |
| 1217 * we do the rollback, otherwise it will have the wrong | |
| 1218 * objset_phys_t. Normally this would happen when this | |
|
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1219 * dataset-open is closed, thus causing the |
| 5367 | 1220 * dataset to be immediately evicted. But when doing "zfs recv |
| 1221 * -F", we reopen the objset before that, so that there is no | |
| 1222 * window where the dataset is closed and inconsistent. | |
| 1223 */ | |
| 1224 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 1225 ds->ds_user_ptr = NULL; | |
|
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1226 } |
|
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1227 |
| 789 | 1228 /* Zero out the deadlist. */ |
| 1229 bplist_close(&ds->ds_deadlist); | |
| 1230 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1231 ds->ds_phys->ds_deadlist_obj = | |
| 1232 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1233 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1234 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1235 |
| 1236 { | |
| 1237 /* Free blkptrs that we gave birth to */ | |
| 1238 zio_t *zio; | |
|
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1239 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 789 | 1240 struct killarg ka; |
|
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1241 int64_t delta; |
| 789 | 1242 |
| 1243 zio = zio_root(tx->tx_pool->dp_spa, NULL, NULL, | |
| 1244 ZIO_FLAG_MUSTSUCCEED); | |
| 1245 ka.usedp = &used; | |
| 1246 ka.compressedp = &compressed; | |
| 1247 ka.uncompressedp = &uncompressed; | |
| 1248 ka.zio = zio; | |
| 1249 ka.tx = tx; | |
| 1250 (void) traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1251 ADVANCE_POST, kill_blkptr, &ka); | |
| 1252 (void) zio_wait(zio); | |
| 1253 | |
|
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1254 /* only deduct space beyond any refreservation */ |
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1255 delta = parent_delta(ds, -used); |
| 2199 | 1256 dsl_dir_diduse_space(ds->ds_dir, |
|
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1257 delta, -compressed, -uncompressed, tx); |
| 789 | 1258 } |
| 1259 | |
| 5367 | 1260 if (ds->ds_prev) { |
| 1261 /* Change our contents to that of the prev snapshot */ | |
| 1262 ASSERT3U(ds->ds_prev->ds_object, ==, | |
| 1263 ds->ds_phys->ds_prev_snap_obj); | |
| 1264 ds->ds_phys->ds_bp = ds->ds_prev->ds_phys->ds_bp; | |
| 1265 ds->ds_phys->ds_used_bytes = | |
| 1266 ds->ds_prev->ds_phys->ds_used_bytes; | |
| 1267 ds->ds_phys->ds_compressed_bytes = | |
| 1268 ds->ds_prev->ds_phys->ds_compressed_bytes; | |
| 1269 ds->ds_phys->ds_uncompressed_bytes = | |
| 1270 ds->ds_prev->ds_phys->ds_uncompressed_bytes; | |
| 1271 ds->ds_phys->ds_flags = ds->ds_prev->ds_phys->ds_flags; | |
| 1272 ds->ds_phys->ds_unique_bytes = 0; | |
| 789 | 1273 |
| 5367 | 1274 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { |
| 1275 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 1276 ds->ds_prev->ds_phys->ds_unique_bytes = 0; | |
| 1277 } | |
| 1278 } else { | |
| 1279 /* Zero out our contents, recreate objset */ | |
| 1280 bzero(&ds->ds_phys->ds_bp, sizeof (blkptr_t)); | |
| 1281 ds->ds_phys->ds_used_bytes = 0; | |
| 1282 ds->ds_phys->ds_compressed_bytes = 0; | |
| 1283 ds->ds_phys->ds_uncompressed_bytes = 0; | |
| 1284 ds->ds_phys->ds_flags = 0; | |
| 1285 ds->ds_phys->ds_unique_bytes = 0; | |
| 1286 (void) dmu_objset_create_impl(ds->ds_dir->dd_pool->dp_spa, ds, | |
| 1287 &ds->ds_phys->ds_bp, *ost, tx); | |
|
2532
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1288 } |
| 4543 | 1289 |
| 1290 spa_history_internal_log(LOG_DS_ROLLBACK, ds->ds_dir->dd_pool->dp_spa, | |
| 1291 tx, cr, "dataset = %llu", ds->ds_object); | |
| 789 | 1292 } |
| 1293 | |
|
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1294 /* ARGSUSED */ |
|
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1295 static int |
| 2199 | 1296 dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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1297 { |
| 2199 | 1298 dsl_dataset_t *ds = arg1; |
| 5367 | 1299 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 1300 uint64_t count; | |
| 1301 int err; | |
|
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1302 |
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1303 /* |
|
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1304 * Can't delete a head dataset if there are snapshots of it. |
|
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1305 * (Except if the only snapshots are from the branch we cloned |
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1306 * from.) |
|
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1307 */ |
|
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1308 if (ds->ds_prev != NULL && |
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1309 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
|
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1310 return (EINVAL); |
|
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1311 |
| 5367 | 1312 /* |
| 1313 * This is really a dsl_dir thing, but check it here so that | |
| 1314 * we'll be less likely to leave this dataset inconsistent & | |
| 1315 * nearly destroyed. | |
| 1316 */ | |
| 1317 err = zap_count(mos, ds->ds_dir->dd_phys->dd_child_dir_zapobj, &count); | |
| 1318 if (err) | |
| 1319 return (err); | |
| 1320 if (count != 0) | |
| 1321 return (EEXIST); | |
| 1322 | |
|
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1323 return (0); |
|
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1324 } |
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1325 |
| 2199 | 1326 /* ARGSUSED */ |
| 1327 static void | |
| 4543 | 1328 dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1329 { |
| 2199 | 1330 dsl_dataset_t *ds = arg1; |
| 4543 | 1331 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
| 789 | 1332 |
| 2199 | 1333 /* Mark it as inconsistent on-disk, in case we crash */ |
| 1334 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1335 ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
| 4543 | 1336 |
| 1337 spa_history_internal_log(LOG_DS_DESTROY_BEGIN, dp->dp_spa, tx, | |
| 1338 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1339 } |
| 789 | 1340 |
| 2199 | 1341 /* ARGSUSED */ |
| 5367 | 1342 int |
| 2199 | 1343 dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 1344 { | |
| 1345 dsl_dataset_t *ds = arg1; | |
| 789 | 1346 |
|
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1347 /* we have an owner hold, so noone else can destroy us */ |
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1348 ASSERT(!DSL_DATASET_IS_DESTROYED(ds)); |
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1349 |
| 789 | 1350 /* Can't delete a branch point. */ |
| 2199 | 1351 if (ds->ds_phys->ds_num_children > 1) |
| 1352 return (EEXIST); | |
| 789 | 1353 |
| 1354 /* | |
| 1355 * Can't delete a head dataset if there are snapshots of it. | |
| 1356 * (Except if the only snapshots are from the branch we cloned | |
| 1357 * from.) | |
| 1358 */ | |
| 1359 if (ds->ds_prev != NULL && | |
| 2199 | 1360 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
| 789 | 1361 return (EINVAL); |
| 1362 | |
| 1363 /* | |
| 1364 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1365 * them. Try again. | |
| 1366 */ | |
| 2199 | 1367 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1368 return (EAGAIN); |
| 2199 | 1369 |
| 1370 /* XXX we should do some i/o error checking... */ | |
| 1371 return (0); | |
| 1372 } | |
| 1373 | |
|
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1374 struct refsarg { |
|
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1375 kmutex_t lock; |
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1376 boolean_t gone; |
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1377 kcondvar_t cv; |
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1378 }; |
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1379 |
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1380 /* ARGSUSED */ |
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1381 static void |
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1382 dsl_dataset_refs_gone(dmu_buf_t *db, void *argv) |
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1383 { |
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1384 struct refsarg *arg = argv; |
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1385 |
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1386 mutex_enter(&arg->lock); |
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1387 arg->gone = TRUE; |
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1388 cv_signal(&arg->cv); |
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1389 mutex_exit(&arg->lock); |
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1390 } |
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1391 |
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1392 static void |
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1393 dsl_dataset_drain_refs(dsl_dataset_t *ds, void *tag) |
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1394 { |
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1395 struct refsarg arg; |
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1396 |
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1397 mutex_init(&arg.lock, NULL, MUTEX_DEFAULT, NULL); |
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1398 cv_init(&arg.cv, NULL, CV_DEFAULT, NULL); |
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1399 arg.gone = FALSE; |
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1400 (void) dmu_buf_update_user(ds->ds_dbuf, ds, &arg, &ds->ds_phys, |
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1401 dsl_dataset_refs_gone); |
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1402 dmu_buf_rele(ds->ds_dbuf, tag); |
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1403 mutex_enter(&arg.lock); |
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1404 while (!arg.gone) |
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1405 cv_wait(&arg.cv, &arg.lock); |
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1406 ASSERT(arg.gone); |
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1407 mutex_exit(&arg.lock); |
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1408 ds->ds_dbuf = NULL; |
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1409 ds->ds_phys = NULL; |
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1410 mutex_destroy(&arg.lock); |
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1411 cv_destroy(&arg.cv); |
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1412 } |
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1413 |
| 5367 | 1414 void |
| 4543 | 1415 dsl_dataset_destroy_sync(void *arg1, void *tag, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1416 { |
| 1417 dsl_dataset_t *ds = arg1; | |
|
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1418 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 2199 | 1419 zio_t *zio; |
| 1420 int err; | |
| 1421 int after_branch_point = FALSE; | |
| 1422 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 1423 objset_t *mos = dp->dp_meta_objset; | |
| 1424 dsl_dataset_t *ds_prev = NULL; | |
| 1425 uint64_t obj; | |
| 1426 | |
|
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1427 ASSERT(ds->ds_owner); |
| 2199 | 1428 ASSERT3U(ds->ds_phys->ds_num_children, <=, 1); |
| 1429 ASSERT(ds->ds_prev == NULL || | |
| 1430 ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object); | |
| 1431 ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg); | |
| 1432 | |
|
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1433 /* signal any waiters that this dataset is going away */ |
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1434 mutex_enter(&ds->ds_lock); |
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1435 ds->ds_owner = dsl_reaper; |
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1436 cv_broadcast(&ds->ds_exclusive_cv); |
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1437 mutex_exit(&ds->ds_lock); |
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1438 |
|
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1439 /* Remove our reservation */ |
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1440 if (ds->ds_reserved != 0) { |
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1441 uint64_t val = 0; |
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1442 dsl_dataset_set_reservation_sync(ds, &val, cr, tx); |
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1443 ASSERT3U(ds->ds_reserved, ==, 0); |
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1444 } |
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1445 |
| 2199 | 1446 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 1447 | |
| 1448 obj = ds->ds_object; | |
| 789 | 1449 |
| 1450 if (ds->ds_phys->ds_prev_snap_obj != 0) { | |
| 1451 if (ds->ds_prev) { | |
| 1452 ds_prev = ds->ds_prev; | |
| 1453 } else { | |
|
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1454 VERIFY(0 == dsl_dataset_hold_obj(dp, |
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1455 ds->ds_phys->ds_prev_snap_obj, FTAG, &ds_prev)); |
| 789 | 1456 } |
| 1457 after_branch_point = | |
| 1458 (ds_prev->ds_phys->ds_next_snap_obj != obj); | |
| 1459 | |
| 1460 dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); | |
| 1461 if (after_branch_point && | |
| 1462 ds->ds_phys->ds_next_snap_obj == 0) { | |
| 1463 /* This clone is toast. */ | |
| 1464 ASSERT(ds_prev->ds_phys->ds_num_children > 1); | |
| 1465 ds_prev->ds_phys->ds_num_children--; | |
| 1466 } else if (!after_branch_point) { | |
| 1467 ds_prev->ds_phys->ds_next_snap_obj = | |
| 1468 ds->ds_phys->ds_next_snap_obj; | |
| 1469 } | |
| 1470 } | |
| 1471 | |
| 1472 zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
| 1473 | |
| 1474 if (ds->ds_phys->ds_next_snap_obj != 0) { | |
| 2199 | 1475 blkptr_t bp; |
| 789 | 1476 dsl_dataset_t *ds_next; |
| 1477 uint64_t itor = 0; | |
|
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1478 uint64_t old_unique; |
| 789 | 1479 |
| 1480 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 1481 | |
|
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1482 VERIFY(0 == dsl_dataset_hold_obj(dp, |
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1483 ds->ds_phys->ds_next_snap_obj, FTAG, &ds_next)); |
| 789 | 1484 ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj); |
| 1485 | |
|
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1486 old_unique = dsl_dataset_unique(ds_next); |
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1487 |
| 789 | 1488 dmu_buf_will_dirty(ds_next->ds_dbuf, tx); |
| 1489 ds_next->ds_phys->ds_prev_snap_obj = | |
| 1490 ds->ds_phys->ds_prev_snap_obj; | |
| 1491 ds_next->ds_phys->ds_prev_snap_txg = | |
| 1492 ds->ds_phys->ds_prev_snap_txg; | |
| 1493 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, | |
| 1494 ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0); | |
| 1495 | |
| 1496 /* | |
| 1497 * Transfer to our deadlist (which will become next's | |
| 1498 * new deadlist) any entries from next's current | |
| 1499 * deadlist which were born before prev, and free the | |
| 1500 * other entries. | |
| 1501 * | |
| 1502 * XXX we're doing this long task with the config lock held | |
| 1503 */ | |
|
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1504 while (bplist_iterate(&ds_next->ds_deadlist, &itor, &bp) == 0) { |
| 789 | 1505 if (bp.blk_birth <= ds->ds_phys->ds_prev_snap_txg) { |
| 1544 | 1506 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, |
| 1507 &bp, tx)); | |
| 789 | 1508 if (ds_prev && !after_branch_point && |
| 1509 bp.blk_birth > | |
| 1510 ds_prev->ds_phys->ds_prev_snap_txg) { | |
| 1511 ds_prev->ds_phys->ds_unique_bytes += | |
| 2082 | 1512 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1513 } |
| 1514 } else { | |
| 2082 | 1515 used += bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1516 compressed += BP_GET_PSIZE(&bp); |
| 1517 uncompressed += BP_GET_UCSIZE(&bp); | |
| 1518 /* XXX check return value? */ | |
| 1519 (void) arc_free(zio, dp->dp_spa, tx->tx_txg, | |
| 1520 &bp, NULL, NULL, ARC_NOWAIT); | |
| 1521 } | |
| 1522 } | |
| 1523 | |
| 1524 /* free next's deadlist */ | |
| 1525 bplist_close(&ds_next->ds_deadlist); | |
| 1526 bplist_destroy(mos, ds_next->ds_phys->ds_deadlist_obj, tx); | |
| 1527 | |
| 1528 /* set next's deadlist to our deadlist */ | |
|
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1529 bplist_close(&ds->ds_deadlist); |
| 789 | 1530 ds_next->ds_phys->ds_deadlist_obj = |
| 1531 ds->ds_phys->ds_deadlist_obj; | |
| 1544 | 1532 VERIFY(0 == bplist_open(&ds_next->ds_deadlist, mos, |
| 1533 ds_next->ds_phys->ds_deadlist_obj)); | |
| 789 | 1534 ds->ds_phys->ds_deadlist_obj = 0; |
| 1535 | |
| 1536 if (ds_next->ds_phys->ds_next_snap_obj != 0) { | |
| 1537 /* | |
| 1538 * Update next's unique to include blocks which | |
| 1539 * were previously shared by only this snapshot | |
| 1540 * and it. Those blocks will be born after the | |
| 1541 * prev snap and before this snap, and will have | |
| 1542 * died after the next snap and before the one | |
| 1543 * after that (ie. be on the snap after next's | |
| 1544 * deadlist). | |
| 1545 * | |
| 1546 * XXX we're doing this long task with the | |
| 1547 * config lock held | |
| 1548 */ | |
| 1549 dsl_dataset_t *ds_after_next; | |
| 1550 | |
|
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|
1551 VERIFY(0 == dsl_dataset_hold_obj(dp, |
|
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|
1552 ds_next->ds_phys->ds_next_snap_obj, |
|
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|
1553 FTAG, &ds_after_next)); |
| 789 | 1554 itor = 0; |
| 1555 while (bplist_iterate(&ds_after_next->ds_deadlist, | |
| 1556 &itor, &bp) == 0) { | |
| 1557 if (bp.blk_birth > | |
| 1558 ds->ds_phys->ds_prev_snap_txg && | |
| 1559 bp.blk_birth <= | |
| 1560 ds->ds_phys->ds_creation_txg) { | |
| 1561 ds_next->ds_phys->ds_unique_bytes += | |
| 2082 | 1562 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1563 } |
| 1564 } | |
| 1565 | |
|
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|
1566 dsl_dataset_rele(ds_after_next, FTAG); |
| 789 | 1567 ASSERT3P(ds_next->ds_prev, ==, NULL); |
| 1568 } else { | |
| 1569 ASSERT3P(ds_next->ds_prev, ==, ds); | |
|
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|
1570 dsl_dataset_drop_ref(ds_next->ds_prev, ds_next); |
|
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|
1571 ds_next->ds_prev = NULL; |
| 789 | 1572 if (ds_prev) { |
|
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|
1573 VERIFY(0 == dsl_dataset_get_ref(dp, |
|
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|
1574 ds->ds_phys->ds_prev_snap_obj, |
|
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|
1575 ds_next, &ds_next->ds_prev)); |
| 789 | 1576 } |
|
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|
1577 |
|
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|
1578 dsl_dataset_recalc_head_uniq(ds_next); |
|
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|
1579 |
|
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|
1580 /* |
|
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|
1581 * Reduce the amount of our unconsmed refreservation |
|
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|
1582 * being charged to our parent by the amount of |
|
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|
1583 * new unique data we have gained. |
|
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|
1584 */ |
|
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|
1585 if (old_unique < ds_next->ds_reserved) { |
|
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|
1586 int64_t mrsdelta; |
|
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|
1587 uint64_t new_unique = |
|
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|
1588 ds_next->ds_phys->ds_unique_bytes; |
|
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|
1589 |
|
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|
1590 ASSERT(old_unique <= new_unique); |
|
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|
1591 mrsdelta = MIN(new_unique - old_unique, |
|
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|
1592 ds_next->ds_reserved - old_unique); |
|
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|
1593 dsl_dir_diduse_space(ds->ds_dir, -mrsdelta, |
|
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|
1594 0, 0, tx); |
|
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|
1595 } |
| 789 | 1596 } |
|
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|
1597 dsl_dataset_rele(ds_next, FTAG); |
| 789 | 1598 |
| 1599 /* | |
|
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|
1600 * NB: unique_bytes might not be accurate for the head objset. |
|
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|
1601 * Before SPA_VERSION 9, we didn't update its value when we |
|
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|
1602 * deleted the most recent snapshot. |
| 789 | 1603 */ |
| 1604 ASSERT3U(used, ==, ds->ds_phys->ds_unique_bytes); | |
| 1605 } else { | |
| 1606 /* | |
| 1607 * There's no next snapshot, so this is a head dataset. | |
| 1608 * Destroy the deadlist. Unless it's a clone, the | |
| 1609 * deadlist should be empty. (If it's a clone, it's | |
| 1610 * safe to ignore the deadlist contents.) | |
| 1611 */ | |
| 1612 struct killarg ka; | |
| 1613 | |
| 1614 ASSERT(after_branch_point || bplist_empty(&ds->ds_deadlist)); | |
| 1615 bplist_close(&ds->ds_deadlist); | |
| 1616 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1617 ds->ds_phys->ds_deadlist_obj = 0; | |
| 1618 | |
| 1619 /* | |
| 1620 * Free everything that we point to (that's born after | |
| 1621 * the previous snapshot, if we are a clone) | |
| 1622 * | |
| 1623 * XXX we're doing this long task with the config lock held | |
| 1624 */ | |
| 1625 ka.usedp = &used; | |
| 1626 ka.compressedp = &compressed; | |
| 1627 ka.uncompressedp = &uncompressed; | |
| 1628 ka.zio = zio; | |
| 1629 ka.tx = tx; | |
| 1630 err = traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1631 ADVANCE_POST, kill_blkptr, &ka); | |
| 1632 ASSERT3U(err, ==, 0); | |
|
5378
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|
1633 ASSERT(spa_version(dp->dp_spa) < |
|
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|
1634 SPA_VERSION_UNIQUE_ACCURATE || |
|
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|
1635 used == ds->ds_phys->ds_unique_bytes); |
| 789 | 1636 } |
| 1637 | |
| 1638 err = zio_wait(zio); | |
| 1639 ASSERT3U(err, ==, 0); | |
| 1640 | |
| 2199 | 1641 dsl_dir_diduse_space(ds->ds_dir, -used, -compressed, -uncompressed, tx); |
| 789 | 1642 |
|
6689
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|
1643 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) { |
|
47572a2f5e73
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|
1644 /* Erase the link in the dir */ |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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diff
changeset
|
1645 dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); |
|
47572a2f5e73
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|
1646 ds->ds_dir->dd_phys->dd_head_dataset_obj = 0; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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diff
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|
1647 ASSERT(ds->ds_phys->ds_snapnames_zapobj != 0); |
| 789 | 1648 err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx); |
| 1649 ASSERT(err == 0); | |
| 1650 } else { | |
| 1651 /* remove from snapshot namespace */ | |
| 1652 dsl_dataset_t *ds_head; | |
|
6689
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|
1653 ASSERT(ds->ds_phys->ds_snapnames_zapobj == 0); |
|
47572a2f5e73
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diff
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|
1654 VERIFY(0 == dsl_dataset_hold_obj(dp, |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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6643
diff
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|
1655 ds->ds_dir->dd_phys->dd_head_dataset_obj, FTAG, &ds_head)); |
|
2207
47efcb3433a7
6439370 assertion failures possible in dsl_dataset_destroy_sync()
ahrens
parents:
2199
diff
changeset
|
1656 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 1657 #ifdef ZFS_DEBUG |
| 1658 { | |
| 1659 uint64_t val; | |
|
6492
903545192033
6654808 FIGNORECASE lookups in a zfs xattr dir don't provide 'realname' data
timh
parents:
6047
diff
changeset
|
1660 |
|
6689
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diff
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|
1661 err = dsl_dataset_snap_lookup(ds_head, |
|
6492
903545192033
6654808 FIGNORECASE lookups in a zfs xattr dir don't provide 'realname' data
timh
parents:
6047
diff
changeset
|
1662 ds->ds_snapname, &val); |
| 789 | 1663 ASSERT3U(err, ==, 0); |
| 1664 ASSERT3U(val, ==, obj); | |
| 1665 } | |
| 1666 #endif | |
|
6689
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6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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6643
diff
changeset
|
1667 err = dsl_dataset_snap_remove(ds_head, ds->ds_snapname, tx); |
| 789 | 1668 ASSERT(err == 0); |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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6643
diff
changeset
|
1669 dsl_dataset_rele(ds_head, FTAG); |
| 789 | 1670 } |
| 1671 | |
| 1672 if (ds_prev && ds->ds_prev != ds_prev) | |
|
6689
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parents:
6643
diff
changeset
|
1673 dsl_dataset_rele(ds_prev, FTAG); |
| 789 | 1674 |
| 5094 | 1675 spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx); |
| 4543 | 1676 spa_history_internal_log(LOG_DS_DESTROY, dp->dp_spa, tx, |
| 1677 cr, "dataset = %llu", ds->ds_object); | |
| 1678 | |
|
6689
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6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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diff
changeset
|
1679 dsl_dir_close(ds->ds_dir, ds); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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6643
diff
changeset
|
1680 ds->ds_dir = NULL; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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6643
diff
changeset
|
1681 dsl_dataset_drain_refs(ds, tag); |
| 2199 | 1682 VERIFY(0 == dmu_object_free(mos, obj, tx)); |
| 1683 } | |
| 1684 | |
|
5378
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PSARC 2007/555 zfs fs-only quotas and reservations
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|
1685 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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diff
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|
1686 dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
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|
1687 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
1688 uint64_t asize; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
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|
1689 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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diff
changeset
|
1690 if (!dmu_tx_is_syncing(tx)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
1691 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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diff
changeset
|
1692 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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changeset
|
1693 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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diff
changeset
|
1694 * If there's an fs-only reservation, any blocks that might become |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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|
1695 * owned by the snapshot dataset must be accommodated by space |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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|
1696 * outside of the reservation. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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diff
changeset
|
1697 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
1698 asize = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
1699 if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, FALSE)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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|
1700 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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diff
changeset
|
1701 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
1702 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
1703 * Propogate any reserved space for this snapshot to other |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
1704 * snapshot checks in this sync group. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
1705 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
1706 if (asize > 0) |
|
111aa1baa84a
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changeset
|
1707 dsl_dir_willuse_space(ds->ds_dir, asize, tx); |
|
111aa1baa84a
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|
1708 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
1709 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
1710 } |
|
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|
1711 |
| 2199 | 1712 /* ARGSUSED */ |
| 1713 int | |
| 1714 dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 1715 { | |
| 5367 | 1716 dsl_dataset_t *ds = arg1; |
| 2199 | 1717 const char *snapname = arg2; |
| 1718 int err; | |
| 1719 uint64_t value; | |
| 789 | 1720 |
| 1721 /* | |
| 2199 | 1722 * We don't allow multiple snapshots of the same txg. If there |
| 1723 * is already one, try again. | |
| 1724 */ | |
| 1725 if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg) | |
| 1726 return (EAGAIN); | |
| 1727 | |
| 1728 /* | |
| 1729 * Check for conflicting name snapshot name. | |
| 789 | 1730 */ |
|
6689
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6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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|
1731 err = dsl_dataset_snap_lookup(ds, snapname, &value); |
| 2199 | 1732 if (err == 0) |
| 1733 return (EEXIST); | |
| 1734 if (err != ENOENT) | |
| 1735 return (err); | |
| 789 | 1736 |
|
3978
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
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|
1737 /* |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
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diff
changeset
|
1738 * 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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diff
changeset
|
1739 * 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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diff
changeset
|
1740 */ |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
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diff
changeset
|
1741 if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN) |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
parents:
3912
diff
changeset
|
1742 return (ENAMETOOLONG); |
|
2dd668007b7a
6533813 recursive snapshotting resulted in a bad stack overflow
mmusante
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diff
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|
1743 |
|
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|
1744 err = dsl_dataset_snapshot_reserve_space(ds, tx); |
|
111aa1baa84a
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diff
changeset
|
1745 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
1746 return (err); |
|
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changeset
|
1747 |
| 2199 | 1748 ds->ds_trysnap_txg = tx->tx_txg; |
| 789 | 1749 return (0); |
| 1750 } | |
| 1751 | |
| 2199 | 1752 void |
| 4543 | 1753 dsl_dataset_snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1754 { |
| 5367 | 1755 dsl_dataset_t *ds = arg1; |
| 2199 | 1756 const char *snapname = arg2; |
| 1757 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 789 | 1758 dmu_buf_t *dbuf; |
| 1759 dsl_dataset_phys_t *dsphys; | |
| 2199 | 1760 uint64_t dsobj; |
| 789 | 1761 objset_t *mos = dp->dp_meta_objset; |
| 1762 int err; | |
| 1763 | |
| 1764 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 2199 | 1765 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 789 | 1766 |
|
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1767 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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1768 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 1769 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 1770 dmu_buf_will_dirty(dbuf, tx); |
| 1771 dsphys = dbuf->db_data; | |
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1772 bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
| 2199 | 1773 dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
| 789 | 1774 dsphys->ds_fsid_guid = unique_create(); |
| 1775 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 1776 sizeof (dsphys->ds_guid)); | |
| 1777 dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj; | |
| 1778 dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg; | |
| 1779 dsphys->ds_next_snap_obj = ds->ds_object; | |
| 1780 dsphys->ds_num_children = 1; | |
| 1781 dsphys->ds_creation_time = gethrestime_sec(); | |
| 1782 dsphys->ds_creation_txg = tx->tx_txg; | |
| 1783 dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj; | |
| 1784 dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes; | |
| 1785 dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes; | |
| 1786 dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 1787 dsphys->ds_flags = ds->ds_phys->ds_flags; |
| 789 | 1788 dsphys->ds_bp = ds->ds_phys->ds_bp; |
| 1544 | 1789 dmu_buf_rele(dbuf, FTAG); |
| 789 | 1790 |
| 2199 | 1791 ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0); |
| 1792 if (ds->ds_prev) { | |
| 1793 ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj == | |
| 789 | 1794 ds->ds_object || |
| 2199 | 1795 ds->ds_prev->ds_phys->ds_num_children > 1); |
| 1796 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { | |
| 1797 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 789 | 1798 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, |
| 2199 | 1799 ds->ds_prev->ds_phys->ds_creation_txg); |
| 1800 ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj; | |
| 789 | 1801 } |
| 1802 } | |
| 1803 | |
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1804 /* |
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1805 * If we have a reference-reservation on this dataset, we will |
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1806 * need to increase the amount of refreservation being charged |
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1807 * since our unique space is going to zero. |
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1808 */ |
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1809 if (ds->ds_reserved) { |
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1810 int64_t add = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
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1811 dsl_dir_diduse_space(ds->ds_dir, add, 0, 0, tx); |
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1812 } |
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1813 |
| 789 | 1814 bplist_close(&ds->ds_deadlist); |
| 1815 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
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1816 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, tx->tx_txg); |
| 789 | 1817 ds->ds_phys->ds_prev_snap_obj = dsobj; |
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1818 ds->ds_phys->ds_prev_snap_txg = tx->tx_txg; |
| 789 | 1819 ds->ds_phys->ds_unique_bytes = 0; |
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1820 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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1821 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 789 | 1822 ds->ds_phys->ds_deadlist_obj = |
| 1823 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1824 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1825 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1826 |
| 1827 dprintf("snap '%s' -> obj %llu\n", snapname, dsobj); | |
| 1828 err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj, | |
| 1829 snapname, 8, 1, &dsobj, tx); | |
| 1830 ASSERT(err == 0); | |
| 1831 | |
| 1832 if (ds->ds_prev) | |
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1833 dsl_dataset_drop_ref(ds->ds_prev, ds); |
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1834 VERIFY(0 == dsl_dataset_get_ref(dp, |
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1835 ds->ds_phys->ds_prev_snap_obj, ds, &ds->ds_prev)); |
| 4543 | 1836 |
| 1837 spa_history_internal_log(LOG_DS_SNAPSHOT, dp->dp_spa, tx, cr, | |
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1838 "dataset = %llu", dsobj); |
| 789 | 1839 } |
| 1840 | |
| 1841 void | |
|
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1842 dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) |
| 789 | 1843 { |
| 1844 ASSERT(dmu_tx_is_syncing(tx)); | |
| 1845 ASSERT(ds->ds_user_ptr != NULL); | |
| 1846 ASSERT(ds->ds_phys->ds_next_snap_obj == 0); | |
| 1847 | |
| 4787 | 1848 /* |
| 1849 * in case we had to change ds_fsid_guid when we opened it, | |
| 1850 * sync it out now. | |
| 1851 */ | |
| 1852 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1853 ds->ds_phys->ds_fsid_guid = ds->ds_fsid_guid; | |
| 1854 | |
| 789 | 1855 dsl_dir_dirty(ds->ds_dir, tx); |
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1856 dmu_objset_sync(ds->ds_user_ptr, zio, tx); |
| 789 | 1857 } |
| 1858 | |
| 1859 void | |
| 2885 | 1860 dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) |
| 789 | 1861 { |
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1862 uint64_t refd, avail, uobjs, aobjs; |
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1863 |
| 2885 | 1864 dsl_dir_stats(ds->ds_dir, nv); |
| 789 | 1865 |
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1866 dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); |
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1867 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); |
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1868 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); |
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1869 |
| 2885 | 1870 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, |
| 1871 ds->ds_phys->ds_creation_time); | |
| 1872 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, | |
| 1873 ds->ds_phys->ds_creation_txg); | |
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1874 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
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1875 ds->ds_quota); |
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1876 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, |
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1877 ds->ds_reserved); |
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1878 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, |
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1879 ds->ds_phys->ds_guid); |
| 789 | 1880 |
| 1881 if (ds->ds_phys->ds_next_snap_obj) { | |
| 1882 /* | |
| 1883 * This is a snapshot; override the dd's space used with | |
| 2885 | 1884 * our unique space and compression ratio. |
| 789 | 1885 */ |
| 2885 | 1886 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, |
| 1887 ds->ds_phys->ds_unique_bytes); | |
| 1888 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, | |
| 1889 ds->ds_phys->ds_compressed_bytes == 0 ? 100 : | |
| 1890 (ds->ds_phys->ds_uncompressed_bytes * 100 / | |
| 1891 ds->ds_phys->ds_compressed_bytes)); | |
| 789 | 1892 } |
| 1893 } | |
| 1894 | |
| 2885 | 1895 void |
| 1896 dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
| 789 | 1897 { |
| 2885 | 1898 stat->dds_creation_txg = ds->ds_phys->ds_creation_txg; |
| 1899 stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT; | |
| 5367 | 1900 stat->dds_guid = ds->ds_phys->ds_guid; |
| 2885 | 1901 if (ds->ds_phys->ds_next_snap_obj) { |
| 1902 stat->dds_is_snapshot = B_TRUE; | |
| 1903 stat->dds_num_clones = ds->ds_phys->ds_num_children - 1; | |
| 1904 } | |
| 1905 | |
| 1906 /* clone origin is really a dsl_dir thing... */ | |
| 5446 | 1907 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); |
| 5367 | 1908 if (ds->ds_dir->dd_phys->dd_origin_obj) { |
| 2885 | 1909 dsl_dataset_t *ods; |
| 1910 | |
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1911 VERIFY(0 == dsl_dataset_get_ref(ds->ds_dir->dd_pool, |
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1912 ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &ods)); |
| 5367 | 1913 dsl_dataset_name(ods, stat->dds_origin); |
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1914 dsl_dataset_drop_ref(ods, FTAG); |
| 2885 | 1915 } |
| 5446 | 1916 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); |
| 2885 | 1917 } |
| 1918 | |
| 1919 uint64_t | |
| 1920 dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
| 1921 { | |
| 4787 | 1922 return (ds->ds_fsid_guid); |
| 2885 | 1923 } |
| 1924 | |
| 1925 void | |
| 1926 dsl_dataset_space(dsl_dataset_t *ds, | |
| 1927 uint64_t *refdbytesp, uint64_t *availbytesp, | |
| 1928 uint64_t *usedobjsp, uint64_t *availobjsp) | |
| 1929 { | |
| 1930 *refdbytesp = ds->ds_phys->ds_used_bytes; | |
| 1931 *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); | |
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1932 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) |
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1933 *availbytesp += ds->ds_reserved - ds->ds_phys->ds_unique_bytes; |
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1934 if (ds->ds_quota != 0) { |
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1935 /* |
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1936 * Adjust available bytes according to refquota |
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1937 */ |
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1938 if (*refdbytesp < ds->ds_quota) |
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1939 *availbytesp = MIN(*availbytesp, |
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1940 ds->ds_quota - *refdbytesp); |
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1941 else |
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1942 *availbytesp = 0; |
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1943 } |
| 2885 | 1944 *usedobjsp = ds->ds_phys->ds_bp.blk_fill; |
| 1945 *availobjsp = DN_MAX_OBJECT - *usedobjsp; | |
| 789 | 1946 } |
| 1947 | |
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1948 boolean_t |
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1949 dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds) |
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1950 { |
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1951 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
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1952 |
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1953 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || |
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1954 dsl_pool_sync_context(dp)); |
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1955 if (ds->ds_prev == NULL) |
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1956 return (B_FALSE); |
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1957 if (ds->ds_phys->ds_bp.blk_birth > |
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1958 ds->ds_prev->ds_phys->ds_creation_txg) |
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1959 return (B_TRUE); |
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1960 return (B_FALSE); |
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1961 } |
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1962 |
| 2199 | 1963 /* ARGSUSED */ |
| 789 | 1964 static int |
| 2199 | 1965 dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 789 | 1966 { |
| 2199 | 1967 dsl_dataset_t *ds = arg1; |
| 1968 char *newsnapname = arg2; | |
| 1969 dsl_dir_t *dd = ds->ds_dir; | |
| 1970 dsl_dataset_t *hds; | |
| 1971 uint64_t val; | |
| 789 | 1972 int err; |
| 1973 | |
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1974 err = dsl_dataset_hold_obj(dd->dd_pool, |
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1975 dd->dd_phys->dd_head_dataset_obj, FTAG, &hds); |
| 789 | 1976 if (err) |
| 1977 return (err); | |
| 1978 | |
| 2199 | 1979 /* new name better not be in use */ |
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1980 err = dsl_dataset_snap_lookup(hds, newsnapname, &val); |
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1981 dsl_dataset_rele(hds, FTAG); |
| 789 | 1982 |
| 2199 | 1983 if (err == 0) |
| 1984 err = EEXIST; | |
| 1985 else if (err == ENOENT) | |
| 1986 err = 0; | |
| 4007 | 1987 |
| 1988 /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
| 1989 if (dsl_dir_namelen(ds->ds_dir) + 1 + strlen(newsnapname) >= MAXNAMELEN) | |
| 1990 err = ENAMETOOLONG; | |
| 1991 | |
| 2199 | 1992 return (err); |
| 1993 } | |
| 789 | 1994 |
| 2199 | 1995 static void |
| 4543 | 1996 dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, |
| 1997 cred_t *cr, dmu_tx_t *tx) | |
| 2199 | 1998 { |
| 1999 dsl_dataset_t *ds = arg1; | |
| 4543 | 2000 const char *newsnapname = arg2; |
| 2199 | 2001 dsl_dir_t *dd = ds->ds_dir; |
| 2002 objset_t *mos = dd->dd_pool->dp_meta_objset; | |
| 2003 dsl_dataset_t *hds; | |
| 2004 int err; | |
| 789 | 2005 |
| 2199 | 2006 ASSERT(ds->ds_phys->ds_next_snap_obj != 0); |
| 789 | 2007 |
|
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2008 VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool, |
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2009 dd->dd_phys->dd_head_dataset_obj, FTAG, &hds)); |
| 789 | 2010 |
| 2199 | 2011 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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2012 err = dsl_dataset_snap_remove(hds, ds->ds_snapname, tx); |
| 789 | 2013 ASSERT3U(err, ==, 0); |
| 2199 | 2014 mutex_enter(&ds->ds_lock); |
| 2015 (void) strcpy(ds->ds_snapname, newsnapname); | |
| 2016 mutex_exit(&ds->ds_lock); | |
| 2017 err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 2018 ds->ds_snapname, 8, 1, &ds->ds_object, tx); | |
| 789 | 2019 ASSERT3U(err, ==, 0); |
| 2020 | |
| 4543 | 2021 spa_history_internal_log(LOG_DS_RENAME, dd->dd_pool->dp_spa, tx, |
| 2022 cr, "dataset = %llu", ds->ds_object); | |
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2023 dsl_dataset_rele(hds, FTAG); |
| 789 | 2024 } |
| 2025 | |
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2026 struct renamesnaparg { |
| 4007 | 2027 dsl_sync_task_group_t *dstg; |
| 2028 char failed[MAXPATHLEN]; | |
| 2029 char *oldsnap; | |
| 2030 char *newsnap; | |
| 2031 }; | |
| 2032 | |
| 2033 static int | |
| 2034 dsl_snapshot_rename_one(char *name, void *arg) | |
| 2035 { | |
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2036 struct renamesnaparg *ra = arg; |
| 4007 | 2037 dsl_dataset_t *ds = NULL; |
| 2038 char *cp; | |
| 2039 int err; | |
| 2040 | |
| 2041 cp = name + strlen(name); | |
| 2042 *cp = '@'; | |
| 2043 (void) strcpy(cp + 1, ra->oldsnap); | |
| 4543 | 2044 |
| 2045 /* | |
| 2046 * For recursive snapshot renames the parent won't be changing | |
| 2047 * so we just pass name for both the to/from argument. | |
| 2048 */ | |
| 2049 if (err = zfs_secpolicy_rename_perms(name, name, CRED())) { | |
| 2050 (void) strcpy(ra->failed, name); | |
| 2051 return (err); | |
| 2052 } | |
| 2053 | |
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2054 #ifdef _KERNEL |
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2055 /* |
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2056 * For all filesystems undergoing rename, we'll need to unmount it. |
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2057 */ |
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2058 (void) zfs_unmount_snap(name, NULL); |
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2059 #endif |
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2060 err = dsl_dataset_hold(name, ra->dstg, &ds); |
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2061 *cp = '\0'; |
| 4007 | 2062 if (err == ENOENT) { |
| 2063 return (0); | |
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2064 } else if (err) { |
| 4007 | 2065 (void) strcpy(ra->failed, name); |
| 2066 return (err); | |
| 2067 } | |
| 2068 | |
| 2069 dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check, | |
| 2070 dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0); | |
| 2071 | |
| 2072 return (0); | |
| 2073 } | |
| 2074 | |
| 2075 static int | |
| 2076 dsl_recursive_rename(char *oldname, const char *newname) | |
| 2077 { | |
| 2078 int err; | |
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2079 struct renamesnaparg *ra; |
| 4007 | 2080 dsl_sync_task_t *dst; |
| 2081 spa_t *spa; | |
| 2082 char *cp, *fsname = spa_strdup(oldname); | |
| 2083 int len = strlen(oldname); | |
| 2084 | |
| 2085 /* truncate the snapshot name to get the fsname */ | |
| 2086 cp = strchr(fsname, '@'); | |
| 2087 *cp = '\0'; | |
| 2088 | |
|
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2089 err = spa_open(fsname, &spa, FTAG); |
| 4007 | 2090 if (err) { |
| 2091 kmem_free(fsname, len + 1); | |
| 2092 return (err); | |
| 2093 } | |
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2094 ra = kmem_alloc(sizeof (struct renamesnaparg), KM_SLEEP); |
| 4007 | 2095 ra->dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); |
| 2096 | |
| 2097 ra->oldsnap = strchr(oldname, '@') + 1; | |
| 2098 ra->newsnap = strchr(newname, '@') + 1; | |
| 2099 *ra->failed = '\0'; | |
| 2100 | |
| 2101 err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra, | |
| 2102 DS_FIND_CHILDREN); | |
| 2103 kmem_free(fsname, len + 1); | |
| 2104 | |
| 2105 if (err == 0) { | |
| 2106 err = dsl_sync_task_group_wait(ra->dstg); | |
| 2107 } | |
| 2108 | |
| 2109 for (dst = list_head(&ra->dstg->dstg_tasks); dst; | |
| 2110 dst = list_next(&ra->dstg->dstg_tasks, dst)) { | |
| 2111 dsl_dataset_t *ds = dst->dst_arg1; | |
| 2112 if (dst->dst_err) { | |
| 2113 dsl_dir_name(ds->ds_dir, ra->failed); | |
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2114 (void) strcat(ra->failed, "@"); |
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2115 (void) strcat(ra->failed, ra->newsnap); |
| 4007 | 2116 } |
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2117 dsl_dataset_rele(ds, ra->dstg); |
| 4007 | 2118 } |
| 2119 | |
| 4543 | 2120 if (err) |
| 2121 (void) strcpy(oldname, ra->failed); | |
| 4007 | 2122 |
| 2123 dsl_sync_task_group_destroy(ra->dstg); | |
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2124 kmem_free(ra, sizeof (struct renamesnaparg)); |
| 4007 | 2125 spa_close(spa, FTAG); |
| 2126 return (err); | |
| 2127 } | |
| 2128 | |
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2129 static int |
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2130 dsl_valid_rename(char *oldname, void *arg) |
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2131 { |
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2132 int delta = *(int *)arg; |
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2133 |
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2134 if (strlen(oldname) + delta >= MAXNAMELEN) |
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2135 return (ENAMETOOLONG); |
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2136 |
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2137 return (0); |
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2138 } |
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2139 |
| 789 | 2140 #pragma weak dmu_objset_rename = dsl_dataset_rename |
| 2141 int | |
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2142 dsl_dataset_rename(char *oldname, const char *newname, boolean_t recursive) |
| 789 | 2143 { |
| 2144 dsl_dir_t *dd; | |
| 2199 | 2145 dsl_dataset_t *ds; |
| 789 | 2146 const char *tail; |
| 2147 int err; | |
| 2148 | |
| 2199 | 2149 err = dsl_dir_open(oldname, FTAG, &dd, &tail); |
| 1544 | 2150 if (err) |
| 2151 return (err); | |
| 789 | 2152 if (tail == NULL) { |
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2153 int delta = strlen(newname) - strlen(oldname); |
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2154 |
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2155 /* if we're growing, validate child size lengths */ |
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2156 if (delta > 0) |
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2157 err = dmu_objset_find(oldname, dsl_valid_rename, |
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2158 &delta, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS); |
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2159 |
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2160 if (!err) |
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2161 err = dsl_dir_rename(dd, newname); |
| 789 | 2162 dsl_dir_close(dd, FTAG); |
| 2163 return (err); | |
| 2164 } | |
| 2165 if (tail[0] != '@') { | |
| 2166 /* the name ended in a nonexistant component */ | |
| 2167 dsl_dir_close(dd, FTAG); | |
| 2168 return (ENOENT); | |
| 2169 } | |
| 2170 | |
| 2199 | 2171 dsl_dir_close(dd, FTAG); |
| 2172 | |
| 2173 /* new name must be snapshot in same filesystem */ | |
| 2174 tail = strchr(newname, '@'); | |
| 2175 if (tail == NULL) | |
| 2176 return (EINVAL); | |
| 2177 tail++; | |
| 2178 if (strncmp(oldname, newname, tail - newname) != 0) | |
| 2179 return (EXDEV); | |
| 789 | 2180 |
| 4007 | 2181 if (recursive) { |
| 2182 err = dsl_recursive_rename(oldname, newname); | |
| 2183 } else { | |
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2184 err = dsl_dataset_hold(oldname, FTAG, &ds); |
| 4007 | 2185 if (err) |
| 2186 return (err); | |
| 2199 | 2187 |
| 4007 | 2188 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2189 dsl_dataset_snapshot_rename_check, | |
| 2190 dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1); | |
| 2199 | 2191 |
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2192 dsl_dataset_rele(ds, FTAG); |
| 4007 | 2193 } |
| 2199 | 2194 |
| 789 | 2195 return (err); |
| 2196 } | |
| 2082 | 2197 |
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2198 struct promotedsarg { |
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2199 list_node_t link; |
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2200 dsl_dataset_t *ds; |
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2201 }; |
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2202 |
| 2199 | 2203 struct promotearg { |
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2204 list_t snap_list; |
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2205 dsl_dataset_t *clone_origin, *old_head; |
| 2199 | 2206 uint64_t used, comp, uncomp, unique; |
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2207 uint64_t newnext_obj; |
| 2199 | 2208 }; |
| 2209 | |
| 4543 | 2210 /* ARGSUSED */ |
| 2082 | 2211 static int |
| 2199 | 2212 dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 2082 | 2213 { |
| 2199 | 2214 dsl_dataset_t *hds = arg1; |
| 2215 struct promotearg *pa = arg2; | |
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2216 struct promotedsarg *snap = list_head(&pa->snap_list); |
| 2199 | 2217 dsl_pool_t *dp = hds->ds_dir->dd_pool; |
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2218 dsl_dataset_t *origin_ds = snap->ds; |
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2219 dsl_dataset_t *newnext_ds; |
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2220 char *name; |
| 2199 | 2221 uint64_t itor = 0; |
| 2082 | 2222 blkptr_t bp; |
|
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2223 int err; |
| 2199 | 2224 |
| 2082 | 2225 /* Check that it is a clone */ |
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2226 if (hds->ds_dir->dd_phys->dd_origin_obj == 0) |
| 2082 | 2227 return (EINVAL); |
| 2228 | |
| 2199 | 2229 /* Since this is so expensive, don't do the preliminary check */ |
| 2230 if (!dmu_tx_is_syncing(tx)) | |
| 2231 return (0); | |
| 2232 | |
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2233 if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE) |
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2234 return (EXDEV); |
| 2082 | 2235 |
| 5367 | 2236 /* find origin's new next ds */ |
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2237 newnext_ds = hds; |
| 5367 | 2238 while (newnext_ds->ds_phys->ds_prev_snap_obj != origin_ds->ds_object) { |
| 2082 | 2239 dsl_dataset_t *prev; |
| 2240 | |
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2241 err = dsl_dataset_hold_obj(dp, |
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2242 newnext_ds->ds_phys->ds_prev_snap_obj, FTAG, &prev); |
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2243 if (newnext_ds != hds) |
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2244 dsl_dataset_rele(newnext_ds, FTAG); |
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2245 if (err) |
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|
2246 return (err); |
| 2082 | 2247 newnext_ds = prev; |
| 2248 } | |
| 2199 | 2249 pa->newnext_obj = newnext_ds->ds_object; |
| 2082 | 2250 |
| 5367 | 2251 /* compute origin's new unique space */ |
|
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2252 pa->unique = 0; |
| 2082 | 2253 while ((err = bplist_iterate(&newnext_ds->ds_deadlist, |
| 2254 &itor, &bp)) == 0) { | |
| 5367 | 2255 if (bp.blk_birth > origin_ds->ds_phys->ds_prev_snap_txg) |
|
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2256 pa->unique += bp_get_dasize(dp->dp_spa, &bp); |
| 2082 | 2257 } |
|
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2258 if (newnext_ds != hds) |
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2259 dsl_dataset_rele(newnext_ds, FTAG); |
| 2082 | 2260 if (err != ENOENT) |
|
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2261 return (err); |
|
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2262 |
| 2082 | 2263 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
|
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2264 |
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2265 /* |
|
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2266 * Walk the snapshots that we are moving |
|
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2267 * |
|
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2268 * Compute space to transfer. Each snapshot gave birth to: |
|
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2269 * (my used) - (prev's used) + (deadlist's used) |
|
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2270 * So a sequence would look like: |
|
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2271 * uN - u(N-1) + dN + ... + u1 - u0 + d1 + u0 - 0 + d0 |
|
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2272 * Which simplifies to: |
|
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2273 * uN + dN + ... + d1 + d0 |
|
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2274 * Note however, if we stop before we reach the ORIGIN we get: |
|
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2275 * uN + dN + ... + dM - uM-1 |
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2276 */ |
|
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2277 pa->used = origin_ds->ds_phys->ds_used_bytes; |
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2278 pa->comp = origin_ds->ds_phys->ds_compressed_bytes; |
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2279 pa->uncomp = origin_ds->ds_phys->ds_uncompressed_bytes; |
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2280 do { |
| 2082 | 2281 uint64_t val, dlused, dlcomp, dluncomp; |
|
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2282 dsl_dataset_t *ds = snap->ds; |
| 2082 | 2283 |
| 2284 /* Check that the snapshot name does not conflict */ | |
| 2285 dsl_dataset_name(ds, name); | |
|
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2286 err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); |
|
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2287 if (err == 0) |
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2288 err = EEXIST; |
|
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2289 if (err != ENOENT) |
| 2082 | 2290 break; |
|
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2291 err = 0; |
|
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2292 |
|
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2293 /* The very first snapshot does not have a deadlist */ |
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2294 if (ds->ds_phys->ds_prev_snap_obj != 0) { |
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2295 if (err = bplist_space(&ds->ds_deadlist, |
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2296 &dlused, &dlcomp, &dluncomp)) |
|
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2297 break; |
|
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2298 pa->used += dlused; |
|
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2299 pa->comp += dlcomp; |
|
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2300 pa->uncomp += dluncomp; |
| 2082 | 2301 } |
|
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2302 } while (snap = list_next(&pa->snap_list, snap)); |
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2303 |
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2304 /* |
|
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2305 * If we are a clone of a clone then we never reached ORIGIN, |
|
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2306 * so we need to subtract out the clone origin's used space. |
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2307 */ |
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2308 if (pa->clone_origin) { |
|
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2309 pa->used -= pa->clone_origin->ds_phys->ds_used_bytes; |
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2310 pa->comp -= pa->clone_origin->ds_phys->ds_compressed_bytes; |
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2311 pa->uncomp -= pa->clone_origin->ds_phys->ds_uncompressed_bytes; |
| 2082 | 2312 } |
| 2313 | |
|
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2314 kmem_free(name, MAXPATHLEN); |
|
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2315 |
| 2082 | 2316 /* Check that there is enough space here */ |
|
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2317 if (err == 0) { |
|
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2318 dsl_dir_t *odd = origin_ds->ds_dir; |
|
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2319 err = dsl_dir_transfer_possible(odd, hds->ds_dir, pa->used); |
|
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2320 } |
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2321 |
| 2199 | 2322 return (err); |
| 2323 } | |
| 2082 | 2324 |
| 2199 | 2325 static void |
| 4543 | 2326 dsl_dataset_promote_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 2327 { |
| 2328 dsl_dataset_t *hds = arg1; | |
| 2329 struct promotearg *pa = arg2; | |
|
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2330 struct promotedsarg *snap = list_head(&pa->snap_list); |
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2331 dsl_dataset_t *origin_ds = snap->ds; |
| 2199 | 2332 dsl_dir_t *dd = hds->ds_dir; |
| 2333 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2334 dsl_dir_t *odd = NULL; |
| 2199 | 2335 char *name; |
| 2336 | |
| 2337 ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)); | |
| 2338 | |
| 2417 | 2339 /* |
| 5367 | 2340 * We need to explicitly open odd, since origin_ds's dd will be |
| 2417 | 2341 * changing. |
| 2342 */ | |
| 5367 | 2343 VERIFY(0 == dsl_dir_open_obj(dp, origin_ds->ds_dir->dd_object, |
| 2344 NULL, FTAG, &odd)); | |
| 2082 | 2345 |
|
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2346 /* change origin's next snap */ |
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2347 dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); |
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2348 origin_ds->ds_phys->ds_next_snap_obj = pa->newnext_obj; |
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2349 |
|
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2350 /* change origin */ |
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2351 dmu_buf_will_dirty(dd->dd_dbuf, tx); |
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2352 ASSERT3U(dd->dd_phys->dd_origin_obj, ==, origin_ds->ds_object); |
|
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2353 dd->dd_phys->dd_origin_obj = odd->dd_phys->dd_origin_obj; |
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2354 dmu_buf_will_dirty(odd->dd_dbuf, tx); |
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2355 odd->dd_phys->dd_origin_obj = origin_ds->ds_object; |
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2356 |
| 2082 | 2357 /* move snapshots to this dir */ |
| 2199 | 2358 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
|
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2359 do { |
|
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2360 dsl_dataset_t *ds = snap->ds; |
| 2082 | 2361 |
| 2362 /* move snap name entry */ | |
| 2363 dsl_dataset_name(ds, name); | |
|
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2364 VERIFY(0 == dsl_dataset_snap_remove(pa->old_head, |
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2365 ds->ds_snapname, tx)); |
| 2199 | 2366 VERIFY(0 == zap_add(dp->dp_meta_objset, |
| 2082 | 2367 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, |
| 2368 8, 1, &ds->ds_object, tx)); | |
| 2369 | |
| 2370 /* change containing dsl_dir */ | |
| 2371 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 5367 | 2372 ASSERT3U(ds->ds_phys->ds_dir_obj, ==, odd->dd_object); |
| 2082 | 2373 ds->ds_phys->ds_dir_obj = dd->dd_object; |
| 5367 | 2374 ASSERT3P(ds->ds_dir, ==, odd); |
| 2082 | 2375 dsl_dir_close(ds->ds_dir, ds); |
| 2199 | 2376 VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, |
| 2082 | 2377 NULL, ds, &ds->ds_dir)); |
| 2378 | |
| 2379 ASSERT3U(dsl_prop_numcb(ds), ==, 0); | |
|
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2380 } while (snap = list_next(&pa->snap_list, snap)); |
| 2082 | 2381 |
| 2382 /* change space accounting */ | |
| 5367 | 2383 dsl_dir_diduse_space(odd, -pa->used, -pa->comp, -pa->uncomp, tx); |
| 2199 | 2384 dsl_dir_diduse_space(dd, pa->used, pa->comp, pa->uncomp, tx); |
| 5367 | 2385 origin_ds->ds_phys->ds_unique_bytes = pa->unique; |
| 2082 | 2386 |
| 4543 | 2387 /* log history record */ |
| 2388 spa_history_internal_log(LOG_DS_PROMOTE, dd->dd_pool->dp_spa, tx, | |
|
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2389 cr, "dataset = %llu", hds->ds_object); |
| 4543 | 2390 |
| 5367 | 2391 dsl_dir_close(odd, FTAG); |
| 2199 | 2392 kmem_free(name, MAXPATHLEN); |
| 2082 | 2393 } |
| 2394 | |
| 2395 int | |
| 2396 dsl_dataset_promote(const char *name) | |
| 2397 { | |
| 2398 dsl_dataset_t *ds; | |
|
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2399 dsl_dir_t *dd; |
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2400 dsl_pool_t *dp; |
| 2082 | 2401 dmu_object_info_t doi; |
| 2199 | 2402 struct promotearg pa; |
|
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2403 struct promotedsarg *snap; |
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2404 uint64_t snap_obj; |
|
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2405 uint64_t last_snap = 0; |
|
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2406 int err; |
|
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2407 |
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2408 err = dsl_dataset_hold(name, FTAG, &ds); |
| 2082 | 2409 if (err) |
| 2410 return (err); | |
|
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2411 dd = ds->ds_dir; |
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2412 dp = dd->dd_pool; |
|
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2413 |
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|
2414 err = dmu_object_info(dp->dp_meta_objset, |
| 2082 | 2415 ds->ds_phys->ds_snapnames_zapobj, &doi); |
| 2416 if (err) { | |
|
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|
2417 dsl_dataset_rele(ds, FTAG); |
| 2082 | 2418 return (err); |
| 2419 } | |
| 2420 | |
| 2421 /* | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2422 * We are going to inherit all the snapshots taken before our |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2423 * origin (i.e., our new origin will be our parent's origin). |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2424 * Take ownership of them so that we can rename them into our |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2425 * namespace. |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2426 */ |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2427 pa.clone_origin = NULL; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2428 list_create(&pa.snap_list, |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2429 sizeof (struct promotedsarg), offsetof(struct promotedsarg, link)); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2430 rw_enter(&dp->dp_config_rwlock, RW_READER); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2431 ASSERT(dd->dd_phys->dd_origin_obj != 0); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2432 snap_obj = dd->dd_phys->dd_origin_obj; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2433 while (snap_obj) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2434 snap = kmem_alloc(sizeof (struct promotedsarg), KM_SLEEP); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2435 err = dsl_dataset_own_obj(dp, snap_obj, 0, FTAG, &snap->ds); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2436 if (err == ENOENT) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2437 /* lost race with snapshot destroy */ |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2438 struct promotedsarg *last = list_tail(&pa.snap_list); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2439 ASSERT(snap_obj != last->ds->ds_phys->ds_prev_snap_obj); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2440 snap_obj = last->ds->ds_phys->ds_prev_snap_obj; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2441 kmem_free(snap, sizeof (struct promotedsarg)); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2442 continue; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2443 } else if (err) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2444 kmem_free(snap, sizeof (struct promotedsarg)); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2445 rw_exit(&dp->dp_config_rwlock); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2446 goto out; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2447 } |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2448 /* |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2449 * We could be a clone of a clone. If we reach our |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2450 * parent's branch point, we're done. |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2451 */ |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2452 if (last_snap && |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2453 snap->ds->ds_phys->ds_next_snap_obj != last_snap) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2454 pa.clone_origin = snap->ds; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2455 kmem_free(snap, sizeof (struct promotedsarg)); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2456 snap_obj = 0; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2457 } else { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2458 list_insert_tail(&pa.snap_list, snap); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2459 last_snap = snap_obj; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2460 snap_obj = snap->ds->ds_phys->ds_prev_snap_obj; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2461 } |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2462 } |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2463 snap = list_head(&pa.snap_list); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2464 ASSERT(snap != NULL); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2465 err = dsl_dataset_hold_obj(dp, |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2466 snap->ds->ds_dir->dd_phys->dd_head_dataset_obj, FTAG, &pa.old_head); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2467 rw_exit(&dp->dp_config_rwlock); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2468 |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2469 if (err) |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2470 goto out; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2471 |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2472 /* |
| 2082 | 2473 * Add in 128x the snapnames zapobj size, since we will be moving |
| 2474 * a bunch of snapnames to the promoted ds, and dirtying their | |
| 2475 * bonus buffers. | |
| 2476 */ | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2477 err = dsl_sync_task_do(dp, dsl_dataset_promote_check, |
| 2199 | 2478 dsl_dataset_promote_sync, ds, &pa, 2 + 2 * doi.doi_physical_blks); |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2479 |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2480 dsl_dataset_rele(pa.old_head, FTAG); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2481 out: |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2482 while ((snap = list_tail(&pa.snap_list)) != NULL) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2483 list_remove(&pa.snap_list, snap); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2484 dsl_dataset_disown(snap->ds, FTAG); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2485 kmem_free(snap, sizeof (struct promotedsarg)); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2486 } |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2487 list_destroy(&pa.snap_list); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2488 if (pa.clone_origin) |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2489 dsl_dataset_disown(pa.clone_origin, FTAG); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2490 dsl_dataset_rele(ds, FTAG); |
| 2082 | 2491 return (err); |
| 2492 } | |
| 3912 | 2493 |
| 5367 | 2494 struct cloneswaparg { |
| 2495 dsl_dataset_t *cds; /* clone dataset */ | |
| 2496 dsl_dataset_t *ohds; /* origin's head dataset */ | |
| 2497 boolean_t force; | |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2498 int64_t unused_refres_delta; /* change in unconsumed refreservation */ |
| 5367 | 2499 }; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2500 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2501 /* ARGSUSED */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2502 static int |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2503 dsl_dataset_clone_swap_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2504 { |
| 5367 | 2505 struct cloneswaparg *csa = arg1; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2506 |
| 5367 | 2507 /* they should both be heads */ |
| 2508 if (dsl_dataset_is_snapshot(csa->cds) || | |
| 2509 dsl_dataset_is_snapshot(csa->ohds)) | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2510 return (EINVAL); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2511 |
| 5367 | 2512 /* the branch point should be just before them */ |
| 2513 if (csa->cds->ds_prev != csa->ohds->ds_prev) | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2514 return (EINVAL); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2515 |
| 5367 | 2516 /* cds should be the clone */ |
| 2517 if (csa->cds->ds_prev->ds_phys->ds_next_snap_obj != | |
| 2518 csa->ohds->ds_object) | |
| 2519 return (EINVAL); | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2520 |
| 5367 | 2521 /* the clone should be a child of the origin */ |
| 2522 if (csa->cds->ds_dir->dd_parent != csa->ohds->ds_dir) | |
| 2523 return (EINVAL); | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2524 |
| 5367 | 2525 /* ohds shouldn't be modified unless 'force' */ |
| 2526 if (!csa->force && dsl_dataset_modified_since_lastsnap(csa->ohds)) | |
| 2527 return (ETXTBSY); | |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2528 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2529 /* adjust amount of any unconsumed refreservation */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2530 csa->unused_refres_delta = |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2531 (int64_t)MIN(csa->ohds->ds_reserved, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2532 csa->ohds->ds_phys->ds_unique_bytes) - |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2533 (int64_t)MIN(csa->ohds->ds_reserved, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2534 csa->cds->ds_phys->ds_unique_bytes); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2535 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2536 if (csa->unused_refres_delta > 0 && |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2537 csa->unused_refres_delta > |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2538 dsl_dir_space_available(csa->ohds->ds_dir, NULL, 0, TRUE)) |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2539 return (ENOSPC); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2540 |
| 5367 | 2541 return (0); |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2542 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2543 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2544 /* ARGSUSED */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2545 static void |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2546 dsl_dataset_clone_swap_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2547 { |
| 5367 | 2548 struct cloneswaparg *csa = arg1; |
| 2549 dsl_pool_t *dp = csa->cds->ds_dir->dd_pool; | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2550 uint64_t itor = 0; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2551 blkptr_t bp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2552 uint64_t unique = 0; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2553 int err; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2554 |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2555 ASSERT(csa->cds->ds_reserved == 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2556 ASSERT(csa->cds->ds_quota == csa->ohds->ds_quota); |
|
1364fb7de75d
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diff
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|
2557 |
| 5367 | 2558 dmu_buf_will_dirty(csa->cds->ds_dbuf, tx); |
| 2559 dmu_buf_will_dirty(csa->ohds->ds_dbuf, tx); | |
| 2560 dmu_buf_will_dirty(csa->cds->ds_prev->ds_dbuf, tx); | |
|
5326
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5094
diff
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|
2561 |
| 5367 | 2562 if (csa->cds->ds_user_ptr != NULL) { |
| 2563 csa->cds->ds_user_evict_func(csa->cds, csa->cds->ds_user_ptr); | |
| 2564 csa->cds->ds_user_ptr = NULL; | |
| 2565 } | |
|
5326
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diff
changeset
|
2566 |
| 5367 | 2567 if (csa->ohds->ds_user_ptr != NULL) { |
| 2568 csa->ohds->ds_user_evict_func(csa->ohds, | |
| 2569 csa->ohds->ds_user_ptr); | |
| 2570 csa->ohds->ds_user_ptr = NULL; | |
| 2571 } | |
|
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|
2572 |
|
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6425096 want online 'zfs recv' (read only and read/write)
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diff
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|
2573 /* compute unique space */ |
| 5367 | 2574 while ((err = bplist_iterate(&csa->cds->ds_deadlist, |
| 2575 &itor, &bp)) == 0) { | |
| 2576 if (bp.blk_birth > csa->cds->ds_prev->ds_phys->ds_prev_snap_txg) | |
| 2577 unique += bp_get_dasize(dp->dp_spa, &bp); | |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
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|
2578 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2579 VERIFY(err == ENOENT); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2580 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2581 /* reset origin's unique bytes */ |
| 5367 | 2582 csa->cds->ds_prev->ds_phys->ds_unique_bytes = unique; |
|
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|
2583 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2584 /* swap blkptrs */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2585 { |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
2586 blkptr_t tmp; |
| 5367 | 2587 tmp = csa->ohds->ds_phys->ds_bp; |
| 2588 csa->ohds->ds_phys->ds_bp = csa->cds->ds_phys->ds_bp; | |
| 2589 csa->cds->ds_phys->ds_bp = tmp; | |
|
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|
2590 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
2591 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2592 /* set dd_*_bytes */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
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diff
changeset
|
2593 { |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2594 int64_t dused, dcomp, duncomp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2595 uint64_t cdl_used, cdl_comp, cdl_uncomp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2596 uint64_t odl_used, odl_comp, odl_uncomp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
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|
2597 |
| 5367 | 2598 VERIFY(0 == bplist_space(&csa->cds->ds_deadlist, &cdl_used, |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2599 &cdl_comp, &cdl_uncomp)); |
| 5367 | 2600 VERIFY(0 == bplist_space(&csa->ohds->ds_deadlist, &odl_used, |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
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|
2601 &odl_comp, &odl_uncomp)); |
| 5367 | 2602 dused = csa->cds->ds_phys->ds_used_bytes + cdl_used - |
| 2603 (csa->ohds->ds_phys->ds_used_bytes + odl_used); | |
| 2604 dcomp = csa->cds->ds_phys->ds_compressed_bytes + cdl_comp - | |
| 2605 (csa->ohds->ds_phys->ds_compressed_bytes + odl_comp); | |
| 2606 duncomp = csa->cds->ds_phys->ds_uncompressed_bytes + | |
| 2607 cdl_uncomp - | |
| 2608 (csa->ohds->ds_phys->ds_uncompressed_bytes + odl_uncomp); | |
|
5326
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diff
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|
2609 |
| 5367 | 2610 dsl_dir_diduse_space(csa->ohds->ds_dir, |
| 2611 dused, dcomp, duncomp, tx); | |
| 2612 dsl_dir_diduse_space(csa->cds->ds_dir, | |
| 2613 -dused, -dcomp, -duncomp, tx); | |
| 2614 } | |
| 2615 | |
| 2616 #define SWITCH64(x, y) \ | |
| 2617 { \ | |
| 2618 uint64_t __tmp = (x); \ | |
| 2619 (x) = (y); \ | |
| 2620 (y) = __tmp; \ | |
|
5326
6752aa2bd5bc
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diff
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|
2621 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2622 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
changeset
|
2623 /* swap ds_*_bytes */ |
| 5367 | 2624 SWITCH64(csa->ohds->ds_phys->ds_used_bytes, |
| 2625 csa->cds->ds_phys->ds_used_bytes); | |
| 2626 SWITCH64(csa->ohds->ds_phys->ds_compressed_bytes, | |
| 2627 csa->cds->ds_phys->ds_compressed_bytes); | |
| 2628 SWITCH64(csa->ohds->ds_phys->ds_uncompressed_bytes, | |
| 2629 csa->cds->ds_phys->ds_uncompressed_bytes); | |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2630 SWITCH64(csa->ohds->ds_phys->ds_unique_bytes, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
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diff
changeset
|
2631 csa->cds->ds_phys->ds_unique_bytes); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2632 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
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5475
diff
changeset
|
2633 /* apply any parent delta for change in unconsumed refreservation */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
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5475
diff
changeset
|
2634 dsl_dir_diduse_space(csa->ohds->ds_dir, csa->unused_refres_delta, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
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5475
diff
changeset
|
2635 0, 0, tx); |
|
5326
6752aa2bd5bc
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diff
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|
2636 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2637 /* swap deadlists */ |
| 5367 | 2638 bplist_close(&csa->cds->ds_deadlist); |
| 2639 bplist_close(&csa->ohds->ds_deadlist); | |
| 2640 SWITCH64(csa->ohds->ds_phys->ds_deadlist_obj, | |
| 2641 csa->cds->ds_phys->ds_deadlist_obj); | |
| 2642 VERIFY(0 == bplist_open(&csa->cds->ds_deadlist, dp->dp_meta_objset, | |
| 2643 csa->cds->ds_phys->ds_deadlist_obj)); | |
| 2644 VERIFY(0 == bplist_open(&csa->ohds->ds_deadlist, dp->dp_meta_objset, | |
| 2645 csa->ohds->ds_phys->ds_deadlist_obj)); | |
|
5326
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|
2646 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2647 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
2648 /* |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2649 * Swap 'clone' with its origin head file system. Used at the end |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2650 * of "online recv" to swizzle the file system to the new version. |
|
5326
6752aa2bd5bc
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diff
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|
2651 */ |
|
6752aa2bd5bc
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diff
changeset
|
2652 int |
| 5367 | 2653 dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, |
| 2654 boolean_t force) | |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
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diff
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|
2655 { |
| 5367 | 2656 struct cloneswaparg csa; |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2657 int error; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2658 |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2659 ASSERT(clone->ds_owner); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2660 ASSERT(origin_head->ds_owner); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2661 retry: |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2662 /* Need exclusive access for the swap */ |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2663 rw_enter(&clone->ds_rwlock, RW_WRITER); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2664 if (!rw_tryenter(&origin_head->ds_rwlock, RW_WRITER)) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2665 rw_exit(&clone->ds_rwlock); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2666 rw_enter(&origin_head->ds_rwlock, RW_WRITER); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2667 if (!rw_tryenter(&clone->ds_rwlock, RW_WRITER)) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2668 rw_exit(&origin_head->ds_rwlock); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2669 goto retry; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2670 } |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2671 } |
| 5367 | 2672 csa.cds = clone; |
| 2673 csa.ohds = origin_head; | |
| 2674 csa.force = force; | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2675 error = dsl_sync_task_do(clone->ds_dir->dd_pool, |
|
5326
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ek110237
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diff
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|
2676 dsl_dataset_clone_swap_check, |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2677 dsl_dataset_clone_swap_sync, &csa, NULL, 9); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2678 return (error); |
|
5326
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changeset
|
2679 } |
|
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|
2680 |
| 3912 | 2681 /* |
| 2682 * Given a pool name and a dataset object number in that pool, | |
| 2683 * return the name of that dataset. | |
| 2684 */ | |
| 2685 int | |
| 2686 dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) | |
| 2687 { | |
| 2688 spa_t *spa; | |
| 2689 dsl_pool_t *dp; | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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parents:
6643
diff
changeset
|
2690 dsl_dataset_t *ds; |
| 3912 | 2691 int error; |
| 2692 | |
| 2693 if ((error = spa_open(pname, &spa, FTAG)) != 0) | |
| 2694 return (error); | |
| 2695 dp = spa_get_dsl(spa); | |
| 2696 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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6643
diff
changeset
|
2697 if ((error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds)) == 0) { |
|
47572a2f5e73
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6643
diff
changeset
|
2698 dsl_dataset_name(ds, buf); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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6643
diff
changeset
|
2699 dsl_dataset_rele(ds, FTAG); |
| 3912 | 2700 } |
| 2701 rw_exit(&dp->dp_config_rwlock); | |
| 2702 spa_close(spa, FTAG); | |
| 2703 | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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diff
changeset
|
2704 return (error); |
| 3912 | 2705 } |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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diff
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|
2706 |
|
111aa1baa84a
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|
2707 int |
|
111aa1baa84a
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diff
changeset
|
2708 dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
|
6689
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6643
diff
changeset
|
2709 uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) |
|
5378
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|
2710 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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diff
changeset
|
2711 int error = 0; |
|
111aa1baa84a
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changeset
|
2712 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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changeset
|
2713 ASSERT3S(asize, >, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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|
2714 |
|
5831
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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diff
changeset
|
2715 /* |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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5712
diff
changeset
|
2716 * *ref_rsrv is the portion of asize that will come from any |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
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diff
changeset
|
2717 * unconsumed refreservation space. |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
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diff
changeset
|
2718 */ |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
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diff
changeset
|
2719 *ref_rsrv = 0; |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
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diff
changeset
|
2720 |
|
5378
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PSARC 2007/555 zfs fs-only quotas and reservations
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changeset
|
2721 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2722 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2723 * Make a space adjustment for reserved bytes. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2724 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2725 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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changeset
|
2726 ASSERT3U(*used, >=, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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changeset
|
2727 ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2728 *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
|
2729 *ref_rsrv = |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2730 asize - MIN(asize, parent_delta(ds, asize + inflight)); |
|
5378
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 (!check_quota || ds->ds_quota == 0) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2734 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2735 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2736 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2737 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2738 * 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
|
2739 * 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
|
2740 * 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
|
2741 * may free up space for us). |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2742 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2743 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
|
2744 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
|
2745 error = ERESTART; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2746 else |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2747 error = EDQUOT; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2748 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2749 mutex_exit(&ds->ds_lock); |
|
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 (error); |
|
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 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2756 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
|
2757 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2758 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2759 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2760 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2761 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2762 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
|
2763 return (ENOTSUP); |
|
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 if (new_quota == 0) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2766 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2767 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2768 if (new_quota < ds->ds_phys->ds_used_bytes || |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2769 new_quota < ds->ds_reserved) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2770 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2771 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2772 return (0); |
|
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 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2775 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2776 void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2777 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
|
2778 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2779 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2780 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2781 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2782 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2783 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
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 ds->ds_quota = new_quota; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2786 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2787 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
|
2788 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2789 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
|
2790 tx, cr, "%lld dataset = %llu ", |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2791 (longlong_t)new_quota, ds->ds_object); |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2792 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2793 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2794 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2795 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
|
2796 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2797 dsl_dataset_t *ds; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2798 int err; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2799 |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2800 err = dsl_dataset_hold(dsname, FTAG, &ds); |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2801 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2802 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2803 |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2804 if (quota != ds->ds_quota) { |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2805 /* |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2806 * 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
|
2807 * want to make sure the file freeing takes effect. |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2808 */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2809 txg_wait_open(ds->ds_dir->dd_pool, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2810 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2811 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2812 dsl_dataset_set_quota_check, dsl_dataset_set_quota_sync, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2813 ds, "a, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2814 } |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2815 dsl_dataset_rele(ds, FTAG); |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2816 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2817 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2818 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2819 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2820 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
|
2821 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2822 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2823 uint64_t *reservationp = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2824 uint64_t new_reservation = *reservationp; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2825 int64_t delta; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2826 uint64_t unique; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2827 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2828 if (new_reservation > INT64_MAX) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2829 return (EOVERFLOW); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2830 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2831 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
|
2832 SPA_VERSION_REFRESERVATION) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2833 return (ENOTSUP); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2834 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2835 if (dsl_dataset_is_snapshot(ds)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2836 return (EINVAL); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2837 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2838 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2839 * 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
|
2840 * space estimates may be inaccurate. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2841 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2842 if (!dmu_tx_is_syncing(tx)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2843 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2844 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2845 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2846 unique = dsl_dataset_unique(ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2847 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
|
2848 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2849 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2850 if (delta > 0 && |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2851 delta > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
|
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PSARC 2007/555 zfs fs-only quotas and reservations
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changeset
|
2852 return (ENOSPC); |
|
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PSARC 2007/555 zfs fs-only quotas and reservations
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|
2853 if (delta > 0 && ds->ds_quota > 0 && |
|
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PSARC 2007/555 zfs fs-only quotas and reservations
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diff
changeset
|
2854 new_reservation > ds->ds_quota) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
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diff
changeset
|
2855 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2856 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2857 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2858 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2859 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
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diff
changeset
|
2860 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2861 static void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2862 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
|
2863 dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2864 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
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diff
changeset
|
2865 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2866 uint64_t *reservationp = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2867 uint64_t new_reservation = *reservationp; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2868 uint64_t unique; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2869 int64_t delta; |
|
111aa1baa84a
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ck153898
parents:
5367
diff
changeset
|
2870 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2871 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
111aa1baa84a
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ck153898
parents:
5367
diff
changeset
|
2872 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
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diff
changeset
|
2873 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2874 unique = dsl_dataset_unique(ds); |
|
111aa1baa84a
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ck153898
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diff
changeset
|
2875 delta = MAX(0, (int64_t)(new_reservation - unique)) - |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2876 MAX(0, (int64_t)(ds->ds_reserved - unique)); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2877 ds->ds_reserved = new_reservation; |
|
111aa1baa84a
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ck153898
parents:
5367
diff
changeset
|
2878 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2879 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2880 dsl_prop_set_uint64_sync(ds->ds_dir, "refreservation", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2881 new_reservation, cr, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2882 |
|
111aa1baa84a
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ck153898
parents:
5367
diff
changeset
|
2883 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
|
2884 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2885 spa_history_internal_log(LOG_DS_REFRESERV, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2886 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
|
2887 (longlong_t)new_reservation, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2888 ds->ds_dir->dd_phys->dd_head_dataset_obj); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2889 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2890 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2891 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2892 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
|
2893 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2894 dsl_dataset_t *ds; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2895 int err; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2896 |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2897 err = dsl_dataset_hold(dsname, FTAG, &ds); |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2898 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2899 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2900 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2901 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
|
2902 dsl_dataset_set_reservation_check, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2903 dsl_dataset_set_reservation_sync, ds, &reservation, 0); |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2904 dsl_dataset_rele(ds, FTAG); |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2905 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2906 } |