Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dsl_dataset.c @ 5831:48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
| author | ck153898 |
|---|---|
| date | Mon, 14 Jan 2008 13:37:53 -0800 |
| parents | 81f1af42bafc |
| children | 235fee4665e7 |
| rev | line source |
|---|---|
| 789 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
| 1544 | 5 * Common Development and Distribution License (the "License"). |
| 6 * You may not use this file except in compliance with the License. | |
| 789 | 7 * |
| 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 9 * or http://www.opensolaris.org/os/licensing. | |
| 10 * See the License for the specific language governing permissions | |
| 11 * and limitations under the License. | |
| 12 * | |
| 13 * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 * If applicable, add the following below this CDDL HEADER, with the | |
| 16 * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 * | |
| 19 * CDDL HEADER END | |
| 20 */ | |
| 21 /* | |
|
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22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
| 789 | 23 * Use is subject to license terms. |
| 24 */ | |
| 25 | |
| 26 #pragma ident "%Z%%M% %I% %E% SMI" | |
| 27 | |
| 28 #include <sys/dmu_objset.h> | |
| 29 #include <sys/dsl_dataset.h> | |
| 30 #include <sys/dsl_dir.h> | |
| 2082 | 31 #include <sys/dsl_prop.h> |
| 2199 | 32 #include <sys/dsl_synctask.h> |
| 789 | 33 #include <sys/dmu_traverse.h> |
| 34 #include <sys/dmu_tx.h> | |
| 35 #include <sys/arc.h> | |
| 36 #include <sys/zio.h> | |
| 37 #include <sys/zap.h> | |
| 38 #include <sys/unique.h> | |
| 39 #include <sys/zfs_context.h> | |
| 4007 | 40 #include <sys/zfs_ioctl.h> |
| 4543 | 41 #include <sys/spa.h> |
| 42 #include <sys/sunddi.h> | |
| 789 | 43 |
| 2199 | 44 static dsl_checkfunc_t dsl_dataset_destroy_begin_check; |
| 45 static dsl_syncfunc_t dsl_dataset_destroy_begin_sync; | |
| 46 static dsl_checkfunc_t dsl_dataset_rollback_check; | |
| 47 static dsl_syncfunc_t dsl_dataset_rollback_sync; | |
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48 static dsl_syncfunc_t dsl_dataset_set_reservation_sync; |
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49 |
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50 #define DS_REF_MAX (1ULL << 62) |
| 789 | 51 |
| 52 #define DSL_DEADLIST_BLOCKSIZE SPA_MAXBLOCKSIZE | |
| 53 | |
| 54 /* | |
| 55 * We use weighted reference counts to express the various forms of exclusion | |
| 56 * between different open modes. A STANDARD open is 1 point, an EXCLUSIVE open | |
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57 * is DS_REF_MAX, and a PRIMARY open is little more than half of an EXCLUSIVE. |
| 789 | 58 * This makes the exclusion logic simple: the total refcnt for all opens cannot |
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59 * exceed DS_REF_MAX. For example, EXCLUSIVE opens are exclusive because their |
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60 * weight (DS_REF_MAX) consumes the entire refcnt space. PRIMARY opens consume |
| 789 | 61 * just over half of the refcnt space, so there can't be more than one, but it |
| 62 * can peacefully coexist with any number of STANDARD opens. | |
| 63 */ | |
| 64 static uint64_t ds_refcnt_weight[DS_MODE_LEVELS] = { | |
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65 0, /* DS_MODE_NONE - invalid */ |
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66 1, /* DS_MODE_STANDARD - unlimited number */ |
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67 (DS_REF_MAX >> 1) + 1, /* DS_MODE_PRIMARY - only one of these */ |
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68 DS_REF_MAX /* DS_MODE_EXCLUSIVE - no other opens */ |
| 789 | 69 }; |
| 70 | |
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71 /* |
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72 * Figure out how much of this delta should be propogated to the dsl_dir |
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73 * layer. If there's a refreservation, that space has already been |
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74 * partially accounted for in our ancestors. |
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75 */ |
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76 static int64_t |
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77 parent_delta(dsl_dataset_t *ds, int64_t delta) |
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78 { |
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79 uint64_t old_bytes, new_bytes; |
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80 |
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81 if (ds->ds_reserved == 0) |
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82 return (delta); |
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83 |
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84 old_bytes = MAX(ds->ds_phys->ds_unique_bytes, ds->ds_reserved); |
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85 new_bytes = MAX(ds->ds_phys->ds_unique_bytes + delta, ds->ds_reserved); |
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86 |
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87 ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); |
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88 return (new_bytes - old_bytes); |
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89 } |
| 789 | 90 |
| 91 void | |
| 92 dsl_dataset_block_born(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 93 { | |
| 2082 | 94 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
| 789 | 95 int compressed = BP_GET_PSIZE(bp); |
| 96 int uncompressed = BP_GET_UCSIZE(bp); | |
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97 int64_t delta; |
| 789 | 98 |
| 99 dprintf_bp(bp, "born, ds=%p\n", ds); | |
| 100 | |
| 101 ASSERT(dmu_tx_is_syncing(tx)); | |
| 102 /* It could have been compressed away to nothing */ | |
| 103 if (BP_IS_HOLE(bp)) | |
| 104 return; | |
| 105 ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
| 106 ASSERT3U(BP_GET_TYPE(bp), <, DMU_OT_NUMTYPES); | |
| 107 if (ds == NULL) { | |
| 108 /* | |
| 109 * Account for the meta-objset space in its placeholder | |
| 110 * dsl_dir. | |
| 111 */ | |
| 112 ASSERT3U(compressed, ==, uncompressed); /* it's all metadata */ | |
| 113 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
| 114 used, compressed, uncompressed, tx); | |
| 115 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
| 116 return; | |
| 117 } | |
| 118 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 119 mutex_enter(&ds->ds_lock); | |
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120 delta = parent_delta(ds, used); |
| 789 | 121 ds->ds_phys->ds_used_bytes += used; |
| 122 ds->ds_phys->ds_compressed_bytes += compressed; | |
| 123 ds->ds_phys->ds_uncompressed_bytes += uncompressed; | |
| 124 ds->ds_phys->ds_unique_bytes += used; | |
| 125 mutex_exit(&ds->ds_lock); | |
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126 dsl_dir_diduse_space(ds->ds_dir, delta, compressed, uncompressed, tx); |
| 789 | 127 } |
| 128 | |
| 129 void | |
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130 dsl_dataset_block_kill(dsl_dataset_t *ds, blkptr_t *bp, zio_t *pio, |
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131 dmu_tx_t *tx) |
| 789 | 132 { |
| 2082 | 133 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
| 789 | 134 int compressed = BP_GET_PSIZE(bp); |
| 135 int uncompressed = BP_GET_UCSIZE(bp); | |
| 136 | |
| 137 ASSERT(dmu_tx_is_syncing(tx)); | |
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138 /* No block pointer => nothing to free */ |
| 789 | 139 if (BP_IS_HOLE(bp)) |
| 140 return; | |
| 141 | |
| 142 ASSERT(used > 0); | |
| 143 if (ds == NULL) { | |
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144 int err; |
| 789 | 145 /* |
| 146 * Account for the meta-objset space in its placeholder | |
| 147 * dataset. | |
| 148 */ | |
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149 err = arc_free(pio, tx->tx_pool->dp_spa, |
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150 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
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151 ASSERT(err == 0); |
| 789 | 152 |
| 153 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
| 154 -used, -compressed, -uncompressed, tx); | |
| 155 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
| 156 return; | |
| 157 } | |
| 158 ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
| 159 | |
| 160 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 161 | |
| 162 if (bp->blk_birth > ds->ds_phys->ds_prev_snap_txg) { | |
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163 int err; |
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164 int64_t delta; |
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165 |
| 789 | 166 dprintf_bp(bp, "freeing: %s", ""); |
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167 err = arc_free(pio, tx->tx_pool->dp_spa, |
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168 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
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169 ASSERT(err == 0); |
| 789 | 170 |
| 171 mutex_enter(&ds->ds_lock); | |
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172 ASSERT(ds->ds_phys->ds_unique_bytes >= used || |
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173 !DS_UNIQUE_IS_ACCURATE(ds)); |
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174 delta = parent_delta(ds, -used); |
| 789 | 175 ds->ds_phys->ds_unique_bytes -= used; |
| 176 mutex_exit(&ds->ds_lock); | |
| 177 dsl_dir_diduse_space(ds->ds_dir, | |
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178 delta, -compressed, -uncompressed, tx); |
| 789 | 179 } else { |
| 180 dprintf_bp(bp, "putting on dead list: %s", ""); | |
| 1544 | 181 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, bp, tx)); |
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182 ASSERT3U(ds->ds_prev->ds_object, ==, |
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183 ds->ds_phys->ds_prev_snap_obj); |
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184 ASSERT(ds->ds_prev->ds_phys->ds_num_children > 0); |
| 789 | 185 /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
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186 if (ds->ds_prev->ds_phys->ds_next_snap_obj == |
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187 ds->ds_object && bp->blk_birth > |
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188 ds->ds_prev->ds_phys->ds_prev_snap_txg) { |
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189 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
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190 mutex_enter(&ds->ds_prev->ds_lock); |
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191 ds->ds_prev->ds_phys->ds_unique_bytes += used; |
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192 mutex_exit(&ds->ds_prev->ds_lock); |
| 789 | 193 } |
| 194 } | |
| 195 mutex_enter(&ds->ds_lock); | |
| 196 ASSERT3U(ds->ds_phys->ds_used_bytes, >=, used); | |
| 197 ds->ds_phys->ds_used_bytes -= used; | |
| 198 ASSERT3U(ds->ds_phys->ds_compressed_bytes, >=, compressed); | |
| 199 ds->ds_phys->ds_compressed_bytes -= compressed; | |
| 200 ASSERT3U(ds->ds_phys->ds_uncompressed_bytes, >=, uncompressed); | |
| 201 ds->ds_phys->ds_uncompressed_bytes -= uncompressed; | |
| 202 mutex_exit(&ds->ds_lock); | |
| 203 } | |
| 204 | |
| 1544 | 205 uint64_t |
| 206 dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) | |
| 789 | 207 { |
| 2885 | 208 uint64_t trysnap = 0; |
| 209 | |
| 789 | 210 if (ds == NULL) |
| 1544 | 211 return (0); |
| 789 | 212 /* |
| 213 * The snapshot creation could fail, but that would cause an | |
| 214 * incorrect FALSE return, which would only result in an | |
| 215 * overestimation of the amount of space that an operation would | |
| 216 * consume, which is OK. | |
| 217 * | |
| 218 * There's also a small window where we could miss a pending | |
| 219 * snapshot, because we could set the sync task in the quiescing | |
| 220 * phase. So this should only be used as a guess. | |
| 221 */ | |
| 2885 | 222 if (ds->ds_trysnap_txg > |
| 223 spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) | |
| 224 trysnap = ds->ds_trysnap_txg; | |
| 225 return (MAX(ds->ds_phys->ds_prev_snap_txg, trysnap)); | |
| 1544 | 226 } |
| 227 | |
| 228 int | |
| 229 dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth) | |
| 230 { | |
| 231 return (blk_birth > dsl_dataset_prev_snap_txg(ds)); | |
| 789 | 232 } |
| 233 | |
| 234 /* ARGSUSED */ | |
| 235 static void | |
| 236 dsl_dataset_evict(dmu_buf_t *db, void *dsv) | |
| 237 { | |
| 238 dsl_dataset_t *ds = dsv; | |
| 239 | |
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240 /* open_refcount == DS_REF_MAX when deleting */ |
| 789 | 241 ASSERT(ds->ds_open_refcount == 0 || |
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242 ds->ds_open_refcount == DS_REF_MAX); |
| 789 | 243 |
| 244 dprintf_ds(ds, "evicting %s\n", ""); | |
| 245 | |
| 4787 | 246 unique_remove(ds->ds_fsid_guid); |
| 789 | 247 |
| 248 if (ds->ds_user_ptr != NULL) | |
| 249 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 250 | |
| 251 if (ds->ds_prev) { | |
| 252 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
| 253 ds->ds_prev = NULL; | |
| 254 } | |
| 255 | |
| 256 bplist_close(&ds->ds_deadlist); | |
| 257 dsl_dir_close(ds->ds_dir, ds); | |
| 258 | |
| 4787 | 259 ASSERT(!list_link_active(&ds->ds_synced_link)); |
| 789 | 260 |
| 2856 | 261 mutex_destroy(&ds->ds_lock); |
| 4787 | 262 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 263 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
| 264 | |
| 789 | 265 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 266 } | |
| 267 | |
| 1544 | 268 static int |
| 789 | 269 dsl_dataset_get_snapname(dsl_dataset_t *ds) |
| 270 { | |
| 271 dsl_dataset_phys_t *headphys; | |
| 272 int err; | |
| 273 dmu_buf_t *headdbuf; | |
| 274 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 275 objset_t *mos = dp->dp_meta_objset; | |
| 276 | |
| 277 if (ds->ds_snapname[0]) | |
| 1544 | 278 return (0); |
| 789 | 279 if (ds->ds_phys->ds_next_snap_obj == 0) |
| 1544 | 280 return (0); |
| 789 | 281 |
| 1544 | 282 err = dmu_bonus_hold(mos, ds->ds_dir->dd_phys->dd_head_dataset_obj, |
| 283 FTAG, &headdbuf); | |
| 284 if (err) | |
| 285 return (err); | |
| 789 | 286 headphys = headdbuf->db_data; |
| 287 err = zap_value_search(dp->dp_meta_objset, | |
| 4577 | 288 headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); |
| 1544 | 289 dmu_buf_rele(headdbuf, FTAG); |
| 290 return (err); | |
| 789 | 291 } |
| 292 | |
| 1544 | 293 int |
| 789 | 294 dsl_dataset_open_obj(dsl_pool_t *dp, uint64_t dsobj, const char *snapname, |
| 1544 | 295 int mode, void *tag, dsl_dataset_t **dsp) |
| 789 | 296 { |
| 297 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
| 298 objset_t *mos = dp->dp_meta_objset; | |
| 299 dmu_buf_t *dbuf; | |
| 300 dsl_dataset_t *ds; | |
| 1544 | 301 int err; |
| 789 | 302 |
| 303 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || | |
| 304 dsl_pool_sync_context(dp)); | |
| 305 | |
| 1544 | 306 err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); |
| 307 if (err) | |
| 308 return (err); | |
| 789 | 309 ds = dmu_buf_get_user(dbuf); |
| 310 if (ds == NULL) { | |
| 311 dsl_dataset_t *winner; | |
| 312 | |
| 313 ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); | |
| 314 ds->ds_dbuf = dbuf; | |
| 315 ds->ds_object = dsobj; | |
| 316 ds->ds_phys = dbuf->db_data; | |
| 317 | |
| 2856 | 318 mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); |
| 4787 | 319 mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); |
| 2856 | 320 mutex_init(&ds->ds_deadlist.bpl_lock, NULL, MUTEX_DEFAULT, |
| 321 NULL); | |
| 322 | |
| 1544 | 323 err = bplist_open(&ds->ds_deadlist, |
| 789 | 324 mos, ds->ds_phys->ds_deadlist_obj); |
| 1544 | 325 if (err == 0) { |
| 326 err = dsl_dir_open_obj(dp, | |
| 327 ds->ds_phys->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
| 328 } | |
| 329 if (err) { | |
| 330 /* | |
| 331 * we don't really need to close the blist if we | |
| 332 * just opened it. | |
| 333 */ | |
| 2856 | 334 mutex_destroy(&ds->ds_lock); |
| 4787 | 335 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 336 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
| 1544 | 337 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 338 dmu_buf_rele(dbuf, tag); | |
| 339 return (err); | |
| 340 } | |
| 789 | 341 |
| 342 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == dsobj) { | |
| 343 ds->ds_snapname[0] = '\0'; | |
| 344 if (ds->ds_phys->ds_prev_snap_obj) { | |
| 1544 | 345 err = dsl_dataset_open_obj(dp, |
| 789 | 346 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 1544 | 347 DS_MODE_NONE, ds, &ds->ds_prev); |
| 789 | 348 } |
| 349 } else { | |
| 350 if (snapname) { | |
| 351 #ifdef ZFS_DEBUG | |
| 352 dsl_dataset_phys_t *headphys; | |
| 1544 | 353 dmu_buf_t *headdbuf; |
| 354 err = dmu_bonus_hold(mos, | |
| 355 ds->ds_dir->dd_phys->dd_head_dataset_obj, | |
| 356 FTAG, &headdbuf); | |
| 357 if (err == 0) { | |
| 358 headphys = headdbuf->db_data; | |
| 359 uint64_t foundobj; | |
| 360 err = zap_lookup(dp->dp_meta_objset, | |
| 361 headphys->ds_snapnames_zapobj, | |
| 362 snapname, sizeof (foundobj), 1, | |
| 363 &foundobj); | |
| 364 ASSERT3U(foundobj, ==, dsobj); | |
| 365 dmu_buf_rele(headdbuf, FTAG); | |
| 366 } | |
| 789 | 367 #endif |
| 368 (void) strcat(ds->ds_snapname, snapname); | |
| 369 } else if (zfs_flags & ZFS_DEBUG_SNAPNAMES) { | |
| 1544 | 370 err = dsl_dataset_get_snapname(ds); |
| 789 | 371 } |
| 372 } | |
| 373 | |
|
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374 if (!dsl_dataset_is_snapshot(ds)) { |
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375 /* |
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376 * In sync context, we're called with either no lock |
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377 * or with the write lock. If we're not syncing, |
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378 * we're always called with the read lock held. |
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379 */ |
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380 boolean_t need_lock = |
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381 !RW_WRITE_HELD(&dp->dp_config_rwlock) && |
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382 dsl_pool_sync_context(dp); |
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383 |
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384 if (need_lock) |
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385 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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386 |
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387 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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388 "refreservation", sizeof (uint64_t), 1, |
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389 &ds->ds_reserved, NULL); |
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390 if (err == 0) { |
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391 err = dsl_prop_get_ds_locked(ds->ds_dir, |
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392 "refquota", sizeof (uint64_t), 1, |
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393 &ds->ds_quota, NULL); |
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394 } |
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395 |
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396 if (need_lock) |
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397 rw_exit(&dp->dp_config_rwlock); |
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398 } else { |
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399 ds->ds_reserved = ds->ds_quota = 0; |
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400 } |
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401 |
| 1544 | 402 if (err == 0) { |
| 403 winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys, | |
| 404 dsl_dataset_evict); | |
| 405 } | |
| 406 if (err || winner) { | |
| 789 | 407 bplist_close(&ds->ds_deadlist); |
| 408 if (ds->ds_prev) { | |
| 409 dsl_dataset_close(ds->ds_prev, | |
| 410 DS_MODE_NONE, ds); | |
| 411 } | |
| 412 dsl_dir_close(ds->ds_dir, ds); | |
| 2856 | 413 mutex_destroy(&ds->ds_lock); |
| 4787 | 414 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 415 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
| 789 | 416 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 1544 | 417 if (err) { |
| 418 dmu_buf_rele(dbuf, tag); | |
| 419 return (err); | |
| 420 } | |
| 789 | 421 ds = winner; |
| 422 } else { | |
| 4787 | 423 ds->ds_fsid_guid = |
| 789 | 424 unique_insert(ds->ds_phys->ds_fsid_guid); |
| 425 } | |
| 426 } | |
| 427 ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
| 428 ASSERT3P(ds->ds_phys, ==, dbuf->db_data); | |
| 429 | |
| 430 mutex_enter(&ds->ds_lock); | |
| 431 if ((DS_MODE_LEVEL(mode) == DS_MODE_PRIMARY && | |
| 2082 | 432 (ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) && |
| 433 !DS_MODE_IS_INCONSISTENT(mode)) || | |
|
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434 (ds->ds_open_refcount + weight > DS_REF_MAX)) { |
| 789 | 435 mutex_exit(&ds->ds_lock); |
| 436 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 1544 | 437 return (EBUSY); |
| 789 | 438 } |
| 439 ds->ds_open_refcount += weight; | |
| 440 mutex_exit(&ds->ds_lock); | |
| 441 | |
| 1544 | 442 *dsp = ds; |
| 443 return (0); | |
| 789 | 444 } |
| 445 | |
| 446 int | |
| 447 dsl_dataset_open_spa(spa_t *spa, const char *name, int mode, | |
| 448 void *tag, dsl_dataset_t **dsp) | |
| 449 { | |
| 450 dsl_dir_t *dd; | |
| 451 dsl_pool_t *dp; | |
| 452 const char *tail; | |
| 453 uint64_t obj; | |
| 454 dsl_dataset_t *ds = NULL; | |
| 455 int err = 0; | |
| 456 | |
| 1544 | 457 err = dsl_dir_open_spa(spa, name, FTAG, &dd, &tail); |
| 458 if (err) | |
| 459 return (err); | |
| 789 | 460 |
| 461 dp = dd->dd_pool; | |
| 462 obj = dd->dd_phys->dd_head_dataset_obj; | |
| 463 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 464 if (obj == 0) { | |
| 465 /* A dataset with no associated objset */ | |
| 466 err = ENOENT; | |
| 467 goto out; | |
| 468 } | |
| 469 | |
| 470 if (tail != NULL) { | |
| 471 objset_t *mos = dp->dp_meta_objset; | |
| 472 | |
| 1544 | 473 err = dsl_dataset_open_obj(dp, obj, NULL, |
| 474 DS_MODE_NONE, tag, &ds); | |
| 475 if (err) | |
| 476 goto out; | |
| 789 | 477 obj = ds->ds_phys->ds_snapnames_zapobj; |
| 478 dsl_dataset_close(ds, DS_MODE_NONE, tag); | |
| 479 ds = NULL; | |
| 480 | |
| 481 if (tail[0] != '@') { | |
| 482 err = ENOENT; | |
| 483 goto out; | |
| 484 } | |
| 485 tail++; | |
| 486 | |
| 487 /* Look for a snapshot */ | |
| 488 if (!DS_MODE_IS_READONLY(mode)) { | |
| 489 err = EROFS; | |
| 490 goto out; | |
| 491 } | |
| 492 dprintf("looking for snapshot '%s'\n", tail); | |
| 493 err = zap_lookup(mos, obj, tail, 8, 1, &obj); | |
| 494 if (err) | |
| 495 goto out; | |
| 496 } | |
| 1544 | 497 err = dsl_dataset_open_obj(dp, obj, tail, mode, tag, &ds); |
| 789 | 498 |
| 499 out: | |
| 500 rw_exit(&dp->dp_config_rwlock); | |
| 501 dsl_dir_close(dd, FTAG); | |
| 502 | |
| 503 ASSERT3U((err == 0), ==, (ds != NULL)); | |
| 504 /* ASSERT(ds == NULL || strcmp(name, ds->ds_name) == 0); */ | |
| 505 | |
| 506 *dsp = ds; | |
| 507 return (err); | |
| 508 } | |
| 509 | |
| 510 int | |
| 511 dsl_dataset_open(const char *name, int mode, void *tag, dsl_dataset_t **dsp) | |
| 512 { | |
| 513 return (dsl_dataset_open_spa(NULL, name, mode, tag, dsp)); | |
| 514 } | |
| 515 | |
| 516 void | |
| 517 dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
| 518 { | |
| 519 if (ds == NULL) { | |
| 520 (void) strcpy(name, "mos"); | |
| 521 } else { | |
| 522 dsl_dir_name(ds->ds_dir, name); | |
| 1544 | 523 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 524 if (ds->ds_snapname[0]) { |
| 525 (void) strcat(name, "@"); | |
| 526 if (!MUTEX_HELD(&ds->ds_lock)) { | |
| 527 /* | |
| 528 * We use a "recursive" mutex so that we | |
| 529 * can call dprintf_ds() with ds_lock held. | |
| 530 */ | |
| 531 mutex_enter(&ds->ds_lock); | |
| 532 (void) strcat(name, ds->ds_snapname); | |
| 533 mutex_exit(&ds->ds_lock); | |
| 534 } else { | |
| 535 (void) strcat(name, ds->ds_snapname); | |
| 536 } | |
| 537 } | |
| 538 } | |
| 539 } | |
| 540 | |
|
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541 static int |
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542 dsl_dataset_namelen(dsl_dataset_t *ds) |
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543 { |
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544 int result; |
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545 |
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546 if (ds == NULL) { |
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547 result = 3; /* "mos" */ |
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548 } else { |
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549 result = dsl_dir_namelen(ds->ds_dir); |
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550 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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551 if (ds->ds_snapname[0]) { |
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552 ++result; /* adding one for the @-sign */ |
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553 if (!MUTEX_HELD(&ds->ds_lock)) { |
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554 /* see dsl_datset_name */ |
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555 mutex_enter(&ds->ds_lock); |
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556 result += strlen(ds->ds_snapname); |
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557 mutex_exit(&ds->ds_lock); |
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558 } else { |
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559 result += strlen(ds->ds_snapname); |
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560 } |
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561 } |
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562 } |
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563 |
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564 return (result); |
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565 } |
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566 |
| 789 | 567 void |
| 568 dsl_dataset_close(dsl_dataset_t *ds, int mode, void *tag) | |
| 569 { | |
| 570 uint64_t weight = ds_refcnt_weight[DS_MODE_LEVEL(mode)]; | |
| 571 mutex_enter(&ds->ds_lock); | |
| 572 ASSERT3U(ds->ds_open_refcount, >=, weight); | |
| 573 ds->ds_open_refcount -= weight; | |
| 574 dprintf_ds(ds, "closing mode %u refcount now 0x%llx\n", | |
| 575 mode, ds->ds_open_refcount); | |
| 576 mutex_exit(&ds->ds_lock); | |
| 577 | |
| 1544 | 578 dmu_buf_rele(ds->ds_dbuf, tag); |
| 789 | 579 } |
| 580 | |
| 581 void | |
| 5367 | 582 dsl_dataset_downgrade(dsl_dataset_t *ds, int oldmode, int newmode) |
| 583 { | |
| 584 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
| 585 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
| 586 mutex_enter(&ds->ds_lock); | |
| 587 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
| 588 ASSERT3U(oldweight, >=, newweight); | |
| 589 ds->ds_open_refcount -= oldweight; | |
| 590 ds->ds_open_refcount += newweight; | |
| 591 mutex_exit(&ds->ds_lock); | |
| 592 } | |
| 593 | |
| 594 boolean_t | |
| 595 dsl_dataset_tryupgrade(dsl_dataset_t *ds, int oldmode, int newmode) | |
| 596 { | |
| 597 boolean_t rv; | |
| 598 uint64_t oldweight = ds_refcnt_weight[DS_MODE_LEVEL(oldmode)]; | |
| 599 uint64_t newweight = ds_refcnt_weight[DS_MODE_LEVEL(newmode)]; | |
| 600 mutex_enter(&ds->ds_lock); | |
| 601 ASSERT3U(ds->ds_open_refcount, >=, oldweight); | |
| 602 ASSERT3U(newweight, >=, oldweight); | |
| 603 if (ds->ds_open_refcount - oldweight + newweight > DS_REF_MAX) { | |
| 604 rv = B_FALSE; | |
| 605 } else { | |
| 606 ds->ds_open_refcount -= oldweight; | |
| 607 ds->ds_open_refcount += newweight; | |
| 608 rv = B_TRUE; | |
| 609 } | |
| 610 mutex_exit(&ds->ds_lock); | |
| 611 return (rv); | |
| 612 } | |
| 613 | |
| 614 void | |
| 789 | 615 dsl_dataset_create_root(dsl_pool_t *dp, uint64_t *ddobjp, dmu_tx_t *tx) |
| 616 { | |
| 617 objset_t *mos = dp->dp_meta_objset; | |
| 618 dmu_buf_t *dbuf; | |
| 619 dsl_dataset_phys_t *dsphys; | |
| 620 dsl_dataset_t *ds; | |
| 621 uint64_t dsobj; | |
| 622 dsl_dir_t *dd; | |
| 623 | |
| 624 dsl_dir_create_root(mos, ddobjp, tx); | |
| 1544 | 625 VERIFY(0 == dsl_dir_open_obj(dp, *ddobjp, NULL, FTAG, &dd)); |
| 789 | 626 |
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627 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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628 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 629 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 630 dmu_buf_will_dirty(dbuf, tx); |
| 631 dsphys = dbuf->db_data; | |
| 632 dsphys->ds_dir_obj = dd->dd_object; | |
| 633 dsphys->ds_fsid_guid = unique_create(); | |
| 634 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 635 sizeof (dsphys->ds_guid)); | |
| 636 dsphys->ds_snapnames_zapobj = | |
|
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637 zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); |
| 789 | 638 dsphys->ds_creation_time = gethrestime_sec(); |
| 639 dsphys->ds_creation_txg = tx->tx_txg; | |
| 640 dsphys->ds_deadlist_obj = | |
| 641 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
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642 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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643 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 1544 | 644 dmu_buf_rele(dbuf, FTAG); |
| 789 | 645 |
| 646 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 647 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 648 dsl_dir_close(dd, FTAG); | |
| 649 | |
| 1544 | 650 VERIFY(0 == |
| 651 dsl_dataset_open_obj(dp, dsobj, NULL, DS_MODE_NONE, FTAG, &ds)); | |
|
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652 (void) dmu_objset_create_impl(dp->dp_spa, ds, |
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653 &ds->ds_phys->ds_bp, DMU_OST_ZFS, tx); |
| 789 | 654 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 655 } | |
| 656 | |
| 2199 | 657 uint64_t |
| 5367 | 658 dsl_dataset_create_sync_impl(dsl_dir_t *dd, dsl_dataset_t *origin, dmu_tx_t *tx) |
| 789 | 659 { |
| 5367 | 660 dsl_pool_t *dp = dd->dd_pool; |
| 789 | 661 dmu_buf_t *dbuf; |
| 662 dsl_dataset_phys_t *dsphys; | |
| 5367 | 663 uint64_t dsobj; |
| 789 | 664 objset_t *mos = dp->dp_meta_objset; |
| 665 | |
| 5367 | 666 ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
| 667 ASSERT(origin == NULL || origin->ds_phys->ds_num_children > 0); | |
| 789 | 668 ASSERT(dmu_tx_is_syncing(tx)); |
| 5367 | 669 ASSERT(dd->dd_phys->dd_head_dataset_obj == 0); |
| 789 | 670 |
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671 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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672 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 673 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 674 dmu_buf_will_dirty(dbuf, tx); |
| 675 dsphys = dbuf->db_data; | |
| 676 dsphys->ds_dir_obj = dd->dd_object; | |
| 677 dsphys->ds_fsid_guid = unique_create(); | |
| 678 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 679 sizeof (dsphys->ds_guid)); | |
| 680 dsphys->ds_snapnames_zapobj = | |
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681 zap_create(mos, DMU_OT_DSL_DS_SNAP_MAP, DMU_OT_NONE, 0, tx); |
| 789 | 682 dsphys->ds_creation_time = gethrestime_sec(); |
| 683 dsphys->ds_creation_txg = tx->tx_txg; | |
| 684 dsphys->ds_deadlist_obj = | |
| 685 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
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686 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
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687 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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688 |
| 5367 | 689 if (origin) { |
| 690 dsphys->ds_prev_snap_obj = origin->ds_object; | |
| 789 | 691 dsphys->ds_prev_snap_txg = |
| 5367 | 692 origin->ds_phys->ds_creation_txg; |
| 789 | 693 dsphys->ds_used_bytes = |
| 5367 | 694 origin->ds_phys->ds_used_bytes; |
| 789 | 695 dsphys->ds_compressed_bytes = |
| 5367 | 696 origin->ds_phys->ds_compressed_bytes; |
| 789 | 697 dsphys->ds_uncompressed_bytes = |
| 5367 | 698 origin->ds_phys->ds_uncompressed_bytes; |
| 699 dsphys->ds_bp = origin->ds_phys->ds_bp; | |
| 789 | 700 |
| 5367 | 701 dmu_buf_will_dirty(origin->ds_dbuf, tx); |
| 702 origin->ds_phys->ds_num_children++; | |
| 789 | 703 |
| 704 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 5367 | 705 dd->dd_phys->dd_origin_obj = origin->ds_object; |
| 789 | 706 } |
| 1544 | 707 dmu_buf_rele(dbuf, FTAG); |
| 789 | 708 |
| 709 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 710 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 5367 | 711 |
| 712 return (dsobj); | |
| 713 } | |
| 714 | |
| 715 uint64_t | |
| 716 dsl_dataset_create_sync(dsl_dir_t *pdd, | |
| 717 const char *lastname, dsl_dataset_t *origin, cred_t *cr, dmu_tx_t *tx) | |
| 718 { | |
| 719 dsl_pool_t *dp = pdd->dd_pool; | |
| 720 uint64_t dsobj, ddobj; | |
| 721 dsl_dir_t *dd; | |
| 722 | |
| 723 ASSERT(lastname[0] != '@'); | |
| 724 | |
| 725 ddobj = dsl_dir_create_sync(pdd, lastname, tx); | |
| 726 VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd)); | |
| 727 | |
| 728 dsobj = dsl_dataset_create_sync_impl(dd, origin, tx); | |
| 729 | |
| 730 dsl_deleg_set_create_perms(dd, tx, cr); | |
| 731 | |
| 789 | 732 dsl_dir_close(dd, FTAG); |
| 733 | |
| 2199 | 734 return (dsobj); |
| 735 } | |
| 736 | |
| 737 struct destroyarg { | |
| 738 dsl_sync_task_group_t *dstg; | |
| 739 char *snapname; | |
| 740 char *failed; | |
| 741 }; | |
| 742 | |
| 743 static int | |
| 744 dsl_snapshot_destroy_one(char *name, void *arg) | |
| 745 { | |
| 746 struct destroyarg *da = arg; | |
| 747 dsl_dataset_t *ds; | |
| 748 char *cp; | |
| 749 int err; | |
| 750 | |
| 751 (void) strcat(name, "@"); | |
| 752 (void) strcat(name, da->snapname); | |
| 753 err = dsl_dataset_open(name, | |
| 754 DS_MODE_EXCLUSIVE | DS_MODE_READONLY | DS_MODE_INCONSISTENT, | |
| 4007 | 755 da->dstg, &ds); |
| 2199 | 756 cp = strchr(name, '@'); |
| 757 *cp = '\0'; | |
| 758 if (err == ENOENT) | |
| 759 return (0); | |
| 760 if (err) { | |
| 761 (void) strcpy(da->failed, name); | |
| 762 return (err); | |
| 763 } | |
| 764 | |
| 765 dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check, | |
| 4007 | 766 dsl_dataset_destroy_sync, ds, da->dstg, 0); |
| 789 | 767 return (0); |
| 768 } | |
| 769 | |
| 2199 | 770 /* |
| 771 * Destroy 'snapname' in all descendants of 'fsname'. | |
| 772 */ | |
| 773 #pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy | |
| 774 int | |
| 775 dsl_snapshots_destroy(char *fsname, char *snapname) | |
| 776 { | |
| 777 int err; | |
| 778 struct destroyarg da; | |
| 779 dsl_sync_task_t *dst; | |
| 780 spa_t *spa; | |
| 781 | |
|
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782 err = spa_open(fsname, &spa, FTAG); |
| 2199 | 783 if (err) |
| 784 return (err); | |
| 785 da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); | |
| 786 da.snapname = snapname; | |
| 787 da.failed = fsname; | |
| 788 | |
| 789 err = dmu_objset_find(fsname, | |
| 2417 | 790 dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN); |
| 2199 | 791 |
| 792 if (err == 0) | |
| 793 err = dsl_sync_task_group_wait(da.dstg); | |
| 794 | |
| 795 for (dst = list_head(&da.dstg->dstg_tasks); dst; | |
| 796 dst = list_next(&da.dstg->dstg_tasks, dst)) { | |
| 797 dsl_dataset_t *ds = dst->dst_arg1; | |
| 798 if (dst->dst_err) { | |
| 799 dsl_dataset_name(ds, fsname); | |
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800 *strchr(fsname, '@') = '\0'; |
| 2199 | 801 } |
| 802 /* | |
| 803 * If it was successful, destroy_sync would have | |
| 804 * closed the ds | |
| 805 */ | |
| 806 if (err) | |
| 4007 | 807 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, da.dstg); |
| 2199 | 808 } |
| 809 | |
| 810 dsl_sync_task_group_destroy(da.dstg); | |
| 811 spa_close(spa, FTAG); | |
| 812 return (err); | |
| 813 } | |
| 814 | |
| 5367 | 815 /* |
| 816 * ds must be opened EXCLUSIVE or PRIMARY. on return (whether | |
| 817 * successful or not), ds will be closed and caller can no longer | |
| 818 * dereference it. | |
| 819 */ | |
| 789 | 820 int |
| 5367 | 821 dsl_dataset_destroy(dsl_dataset_t *ds, void *tag) |
| 789 | 822 { |
| 823 int err; | |
| 2199 | 824 dsl_sync_task_group_t *dstg; |
| 825 objset_t *os; | |
| 789 | 826 dsl_dir_t *dd; |
| 2199 | 827 uint64_t obj; |
| 828 | |
| 5367 | 829 if (ds->ds_open_refcount != DS_REF_MAX) { |
| 830 if (dsl_dataset_tryupgrade(ds, DS_MODE_PRIMARY, | |
| 831 DS_MODE_EXCLUSIVE) == 0) { | |
| 832 dsl_dataset_close(ds, DS_MODE_PRIMARY, tag); | |
| 833 return (EBUSY); | |
| 834 } | |
| 835 } | |
| 836 | |
| 837 if (dsl_dataset_is_snapshot(ds)) { | |
| 2199 | 838 /* Destroying a snapshot is simpler */ |
| 839 err = dsl_sync_task_do(ds->ds_dir->dd_pool, | |
| 840 dsl_dataset_destroy_check, dsl_dataset_destroy_sync, | |
| 5367 | 841 ds, tag, 0); |
| 842 goto out; | |
| 2199 | 843 } |
| 844 | |
| 845 dd = ds->ds_dir; | |
| 789 | 846 |
| 2199 | 847 /* |
| 848 * Check for errors and mark this ds as inconsistent, in | |
| 849 * case we crash while freeing the objects. | |
| 850 */ | |
| 851 err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check, | |
| 852 dsl_dataset_destroy_begin_sync, ds, NULL, 0); | |
| 5367 | 853 if (err) |
| 854 goto out; | |
| 855 | |
| 856 err = dmu_objset_open_ds(ds, DMU_OST_ANY, &os); | |
| 857 if (err) | |
| 858 goto out; | |
| 2199 | 859 |
| 860 /* | |
| 861 * remove the objects in open context, so that we won't | |
| 862 * have too much to do in syncing context. | |
| 863 */ | |
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864 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, |
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865 ds->ds_phys->ds_prev_snap_txg)) { |
| 2199 | 866 dmu_tx_t *tx = dmu_tx_create(os); |
| 867 dmu_tx_hold_free(tx, obj, 0, DMU_OBJECT_END); | |
| 868 dmu_tx_hold_bonus(tx, obj); | |
| 869 err = dmu_tx_assign(tx, TXG_WAIT); | |
| 870 if (err) { | |
| 871 /* | |
| 872 * Perhaps there is not enough disk | |
| 873 * space. Just deal with it from | |
| 874 * dsl_dataset_destroy_sync(). | |
| 875 */ | |
| 876 dmu_tx_abort(tx); | |
| 877 continue; | |
| 878 } | |
| 879 VERIFY(0 == dmu_object_free(os, obj, tx)); | |
| 880 dmu_tx_commit(tx); | |
| 881 } | |
| 882 /* Make sure it's not dirty before we finish destroying it. */ | |
| 883 txg_wait_synced(dd->dd_pool, 0); | |
| 884 | |
| 885 dmu_objset_close(os); | |
| 886 if (err != ESRCH) | |
| 5367 | 887 goto out; |
| 2199 | 888 |
| 5367 | 889 if (ds->ds_user_ptr) { |
| 890 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 891 ds->ds_user_ptr = NULL; | |
| 892 } | |
| 893 | |
| 894 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); | |
| 895 err = dsl_dir_open_obj(dd->dd_pool, dd->dd_object, NULL, FTAG, &dd); | |
| 896 rw_exit(&dd->dd_pool->dp_config_rwlock); | |
| 897 | |
| 1544 | 898 if (err) |
| 5367 | 899 goto out; |
| 789 | 900 |
| 2199 | 901 /* |
| 902 * Blow away the dsl_dir + head dataset. | |
| 903 */ | |
| 904 dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool); | |
| 905 dsl_sync_task_create(dstg, dsl_dataset_destroy_check, | |
| 5367 | 906 dsl_dataset_destroy_sync, ds, tag, 0); |
| 2199 | 907 dsl_sync_task_create(dstg, dsl_dir_destroy_check, |
| 908 dsl_dir_destroy_sync, dd, FTAG, 0); | |
| 909 err = dsl_sync_task_group_wait(dstg); | |
| 910 dsl_sync_task_group_destroy(dstg); | |
| 911 /* if it is successful, *destroy_sync will close the ds+dd */ | |
| 5367 | 912 if (err) |
| 2199 | 913 dsl_dir_close(dd, FTAG); |
| 5367 | 914 out: |
| 915 if (err) | |
| 916 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); | |
| 789 | 917 return (err); |
| 918 } | |
| 919 | |
| 920 int | |
| 5367 | 921 dsl_dataset_rollback(dsl_dataset_t *ds, dmu_objset_type_t ost) |
| 789 | 922 { |
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923 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 5367 | 924 |
| 2199 | 925 return (dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 926 dsl_dataset_rollback_check, dsl_dataset_rollback_sync, | |
| 5367 | 927 ds, &ost, 0)); |
| 789 | 928 } |
| 929 | |
| 930 void * | |
| 931 dsl_dataset_set_user_ptr(dsl_dataset_t *ds, | |
| 932 void *p, dsl_dataset_evict_func_t func) | |
| 933 { | |
| 934 void *old; | |
| 935 | |
| 936 mutex_enter(&ds->ds_lock); | |
| 937 old = ds->ds_user_ptr; | |
| 938 if (old == NULL) { | |
| 939 ds->ds_user_ptr = p; | |
| 940 ds->ds_user_evict_func = func; | |
| 941 } | |
| 942 mutex_exit(&ds->ds_lock); | |
| 943 return (old); | |
| 944 } | |
| 945 | |
| 946 void * | |
| 947 dsl_dataset_get_user_ptr(dsl_dataset_t *ds) | |
| 948 { | |
| 949 return (ds->ds_user_ptr); | |
| 950 } | |
| 951 | |
| 952 | |
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953 blkptr_t * |
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954 dsl_dataset_get_blkptr(dsl_dataset_t *ds) |
| 789 | 955 { |
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956 return (&ds->ds_phys->ds_bp); |
| 789 | 957 } |
| 958 | |
| 959 void | |
| 960 dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 961 { | |
| 962 ASSERT(dmu_tx_is_syncing(tx)); | |
| 963 /* If it's the meta-objset, set dp_meta_rootbp */ | |
| 964 if (ds == NULL) { | |
| 965 tx->tx_pool->dp_meta_rootbp = *bp; | |
| 966 } else { | |
| 967 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 968 ds->ds_phys->ds_bp = *bp; | |
| 969 } | |
| 970 } | |
| 971 | |
| 972 spa_t * | |
| 973 dsl_dataset_get_spa(dsl_dataset_t *ds) | |
| 974 { | |
| 975 return (ds->ds_dir->dd_pool->dp_spa); | |
| 976 } | |
| 977 | |
| 978 void | |
| 979 dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
| 980 { | |
| 981 dsl_pool_t *dp; | |
| 982 | |
| 983 if (ds == NULL) /* this is the meta-objset */ | |
| 984 return; | |
| 985 | |
| 986 ASSERT(ds->ds_user_ptr != NULL); | |
| 2885 | 987 |
| 988 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 989 panic("dirtying snapshot!"); | |
| 789 | 990 |
| 991 dp = ds->ds_dir->dd_pool; | |
| 992 | |
| 993 if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) { | |
| 994 /* up the hold count until we can be written out */ | |
| 995 dmu_buf_add_ref(ds->ds_dbuf, ds); | |
| 996 } | |
| 997 } | |
| 998 | |
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999 /* |
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1000 * The unique space in the head dataset can be calculated by subtracting |
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1001 * the space used in the most recent snapshot, that is still being used |
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1002 * in this file system, from the space currently in use. To figure out |
|
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1003 * the space in the most recent snapshot still in use, we need to take |
|
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1004 * the total space used in the snapshot and subtract out the space that |
|
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1005 * has been freed up since the snapshot was taken. |
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1006 */ |
|
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1007 static void |
|
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1008 dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) |
|
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1009 { |
|
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1010 uint64_t mrs_used; |
|
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1011 uint64_t dlused, dlcomp, dluncomp; |
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1012 |
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1013 ASSERT(ds->ds_object == ds->ds_dir->dd_phys->dd_head_dataset_obj); |
|
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1014 |
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1015 if (ds->ds_phys->ds_prev_snap_obj != 0) |
|
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1016 mrs_used = ds->ds_prev->ds_phys->ds_used_bytes; |
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1017 else |
|
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1018 mrs_used = 0; |
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1019 |
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1020 VERIFY(0 == bplist_space(&ds->ds_deadlist, &dlused, &dlcomp, |
|
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1021 &dluncomp)); |
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1022 |
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1023 ASSERT3U(dlused, <=, mrs_used); |
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1024 ds->ds_phys->ds_unique_bytes = |
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1025 ds->ds_phys->ds_used_bytes - (mrs_used - dlused); |
|
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1026 |
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1027 if (!DS_UNIQUE_IS_ACCURATE(ds) && |
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1028 spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
|
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1029 SPA_VERSION_UNIQUE_ACCURATE) |
|
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1030 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
|
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1031 } |
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1032 |
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1033 static uint64_t |
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1034 dsl_dataset_unique(dsl_dataset_t *ds) |
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1035 { |
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1036 if (!DS_UNIQUE_IS_ACCURATE(ds) && !dsl_dataset_is_snapshot(ds)) |
|
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1037 dsl_dataset_recalc_head_uniq(ds); |
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1038 |
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1039 return (ds->ds_phys->ds_unique_bytes); |
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1040 } |
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1041 |
| 789 | 1042 struct killarg { |
|
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1043 int64_t *usedp; |
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1044 int64_t *compressedp; |
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1045 int64_t *uncompressedp; |
| 789 | 1046 zio_t *zio; |
| 1047 dmu_tx_t *tx; | |
| 1048 }; | |
| 1049 | |
| 1050 static int | |
| 1051 kill_blkptr(traverse_blk_cache_t *bc, spa_t *spa, void *arg) | |
| 1052 { | |
| 1053 struct killarg *ka = arg; | |
| 1054 blkptr_t *bp = &bc->bc_blkptr; | |
| 1055 | |
| 1056 ASSERT3U(bc->bc_errno, ==, 0); | |
| 1057 | |
| 1058 /* | |
| 1059 * Since this callback is not called concurrently, no lock is | |
| 1060 * needed on the accounting values. | |
| 1061 */ | |
| 2082 | 1062 *ka->usedp += bp_get_dasize(spa, bp); |
| 789 | 1063 *ka->compressedp += BP_GET_PSIZE(bp); |
| 1064 *ka->uncompressedp += BP_GET_UCSIZE(bp); | |
| 1065 /* XXX check for EIO? */ | |
| 1066 (void) arc_free(ka->zio, spa, ka->tx->tx_txg, bp, NULL, NULL, | |
| 1067 ARC_NOWAIT); | |
| 1068 return (0); | |
| 1069 } | |
| 1070 | |
| 1071 /* ARGSUSED */ | |
| 2199 | 1072 static int |
| 1073 dsl_dataset_rollback_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 789 | 1074 { |
| 2199 | 1075 dsl_dataset_t *ds = arg1; |
| 5367 | 1076 dmu_objset_type_t *ost = arg2; |
| 789 | 1077 |
| 2199 | 1078 /* |
| 5367 | 1079 * We can only roll back to emptyness if it is a ZPL objset. |
| 2199 | 1080 */ |
| 5367 | 1081 if (*ost != DMU_OST_ZFS && ds->ds_phys->ds_prev_snap_txg == 0) |
| 789 | 1082 return (EINVAL); |
| 1083 | |
| 2199 | 1084 /* |
| 1085 * This must not be a snapshot. | |
| 1086 */ | |
| 1087 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 1088 return (EINVAL); | |
| 789 | 1089 |
| 1090 /* | |
| 1091 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1092 * them. Try again. | |
| 1093 */ | |
| 2199 | 1094 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1095 return (EAGAIN); |
| 2199 | 1096 |
| 1097 return (0); | |
| 1098 } | |
| 789 | 1099 |
| 2199 | 1100 /* ARGSUSED */ |
| 1101 static void | |
| 4543 | 1102 dsl_dataset_rollback_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1103 { |
| 1104 dsl_dataset_t *ds = arg1; | |
| 5367 | 1105 dmu_objset_type_t *ost = arg2; |
| 2199 | 1106 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 789 | 1107 |
| 1108 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1109 | |
|
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1110 /* |
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1111 * Before the roll back destroy the zil. |
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1112 */ |
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1113 if (ds->ds_user_ptr != NULL) { |
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1114 zil_rollback_destroy( |
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1115 ((objset_impl_t *)ds->ds_user_ptr)->os_zil, tx); |
| 5367 | 1116 |
| 1117 /* | |
| 1118 * We need to make sure that the objset_impl_t is reopened after | |
| 1119 * we do the rollback, otherwise it will have the wrong | |
| 1120 * objset_phys_t. Normally this would happen when this | |
| 1121 * DS_MODE_EXCLUSIVE dataset-open is closed, thus causing the | |
| 1122 * dataset to be immediately evicted. But when doing "zfs recv | |
| 1123 * -F", we reopen the objset before that, so that there is no | |
| 1124 * window where the dataset is closed and inconsistent. | |
| 1125 */ | |
| 1126 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 1127 ds->ds_user_ptr = NULL; | |
|
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1128 } |
|
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1129 |
| 789 | 1130 /* Zero out the deadlist. */ |
| 1131 bplist_close(&ds->ds_deadlist); | |
| 1132 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1133 ds->ds_phys->ds_deadlist_obj = | |
| 1134 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1135 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1136 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1137 |
| 1138 { | |
| 1139 /* Free blkptrs that we gave birth to */ | |
| 1140 zio_t *zio; | |
|
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1141 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 789 | 1142 struct killarg ka; |
|
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1143 int64_t delta; |
| 789 | 1144 |
| 1145 zio = zio_root(tx->tx_pool->dp_spa, NULL, NULL, | |
| 1146 ZIO_FLAG_MUSTSUCCEED); | |
| 1147 ka.usedp = &used; | |
| 1148 ka.compressedp = &compressed; | |
| 1149 ka.uncompressedp = &uncompressed; | |
| 1150 ka.zio = zio; | |
| 1151 ka.tx = tx; | |
| 1152 (void) traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1153 ADVANCE_POST, kill_blkptr, &ka); | |
| 1154 (void) zio_wait(zio); | |
| 1155 | |
|
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1156 /* only deduct space beyond any refreservation */ |
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1157 delta = parent_delta(ds, -used); |
| 2199 | 1158 dsl_dir_diduse_space(ds->ds_dir, |
|
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1159 delta, -compressed, -uncompressed, tx); |
| 789 | 1160 } |
| 1161 | |
| 5367 | 1162 if (ds->ds_prev) { |
| 1163 /* Change our contents to that of the prev snapshot */ | |
| 1164 ASSERT3U(ds->ds_prev->ds_object, ==, | |
| 1165 ds->ds_phys->ds_prev_snap_obj); | |
| 1166 ds->ds_phys->ds_bp = ds->ds_prev->ds_phys->ds_bp; | |
| 1167 ds->ds_phys->ds_used_bytes = | |
| 1168 ds->ds_prev->ds_phys->ds_used_bytes; | |
| 1169 ds->ds_phys->ds_compressed_bytes = | |
| 1170 ds->ds_prev->ds_phys->ds_compressed_bytes; | |
| 1171 ds->ds_phys->ds_uncompressed_bytes = | |
| 1172 ds->ds_prev->ds_phys->ds_uncompressed_bytes; | |
| 1173 ds->ds_phys->ds_flags = ds->ds_prev->ds_phys->ds_flags; | |
| 1174 ds->ds_phys->ds_unique_bytes = 0; | |
| 789 | 1175 |
| 5367 | 1176 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { |
| 1177 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 1178 ds->ds_prev->ds_phys->ds_unique_bytes = 0; | |
| 1179 } | |
| 1180 } else { | |
| 1181 /* Zero out our contents, recreate objset */ | |
| 1182 bzero(&ds->ds_phys->ds_bp, sizeof (blkptr_t)); | |
| 1183 ds->ds_phys->ds_used_bytes = 0; | |
| 1184 ds->ds_phys->ds_compressed_bytes = 0; | |
| 1185 ds->ds_phys->ds_uncompressed_bytes = 0; | |
| 1186 ds->ds_phys->ds_flags = 0; | |
| 1187 ds->ds_phys->ds_unique_bytes = 0; | |
| 1188 (void) dmu_objset_create_impl(ds->ds_dir->dd_pool->dp_spa, ds, | |
| 1189 &ds->ds_phys->ds_bp, *ost, tx); | |
|
2532
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1190 } |
| 4543 | 1191 |
| 1192 spa_history_internal_log(LOG_DS_ROLLBACK, ds->ds_dir->dd_pool->dp_spa, | |
| 1193 tx, cr, "dataset = %llu", ds->ds_object); | |
| 789 | 1194 } |
| 1195 | |
|
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1196 /* ARGSUSED */ |
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1197 static int |
| 2199 | 1198 dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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1199 { |
| 2199 | 1200 dsl_dataset_t *ds = arg1; |
| 5367 | 1201 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 1202 uint64_t count; | |
| 1203 int err; | |
|
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1204 |
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1205 /* |
|
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1206 * Can't delete a head dataset if there are snapshots of it. |
|
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1207 * (Except if the only snapshots are from the branch we cloned |
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1208 * from.) |
|
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1209 */ |
|
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1210 if (ds->ds_prev != NULL && |
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1211 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
|
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1212 return (EINVAL); |
|
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1213 |
| 5367 | 1214 /* |
| 1215 * This is really a dsl_dir thing, but check it here so that | |
| 1216 * we'll be less likely to leave this dataset inconsistent & | |
| 1217 * nearly destroyed. | |
| 1218 */ | |
| 1219 err = zap_count(mos, ds->ds_dir->dd_phys->dd_child_dir_zapobj, &count); | |
| 1220 if (err) | |
| 1221 return (err); | |
| 1222 if (count != 0) | |
| 1223 return (EEXIST); | |
| 1224 | |
|
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1225 return (0); |
|
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1226 } |
|
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1227 |
| 2199 | 1228 /* ARGSUSED */ |
| 1229 static void | |
| 4543 | 1230 dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1231 { |
| 2199 | 1232 dsl_dataset_t *ds = arg1; |
| 4543 | 1233 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
| 789 | 1234 |
| 2199 | 1235 /* Mark it as inconsistent on-disk, in case we crash */ |
| 1236 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1237 ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
| 4543 | 1238 |
| 1239 spa_history_internal_log(LOG_DS_DESTROY_BEGIN, dp->dp_spa, tx, | |
| 1240 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1241 } |
| 789 | 1242 |
| 2199 | 1243 /* ARGSUSED */ |
| 5367 | 1244 int |
| 2199 | 1245 dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 1246 { | |
| 1247 dsl_dataset_t *ds = arg1; | |
| 789 | 1248 |
| 1249 /* Can't delete a branch point. */ | |
| 2199 | 1250 if (ds->ds_phys->ds_num_children > 1) |
| 1251 return (EEXIST); | |
| 789 | 1252 |
| 1253 /* | |
| 1254 * Can't delete a head dataset if there are snapshots of it. | |
| 1255 * (Except if the only snapshots are from the branch we cloned | |
| 1256 * from.) | |
| 1257 */ | |
| 1258 if (ds->ds_prev != NULL && | |
| 2199 | 1259 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
| 789 | 1260 return (EINVAL); |
| 1261 | |
| 1262 /* | |
| 1263 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1264 * them. Try again. | |
| 1265 */ | |
| 2199 | 1266 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1267 return (EAGAIN); |
| 2199 | 1268 |
| 1269 /* XXX we should do some i/o error checking... */ | |
| 1270 return (0); | |
| 1271 } | |
| 1272 | |
| 5367 | 1273 void |
| 4543 | 1274 dsl_dataset_destroy_sync(void *arg1, void *tag, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1275 { |
| 1276 dsl_dataset_t *ds = arg1; | |
|
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1277 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 2199 | 1278 zio_t *zio; |
| 1279 int err; | |
| 1280 int after_branch_point = FALSE; | |
| 1281 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 1282 objset_t *mos = dp->dp_meta_objset; | |
| 1283 dsl_dataset_t *ds_prev = NULL; | |
| 1284 uint64_t obj; | |
| 1285 | |
|
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1286 ASSERT3U(ds->ds_open_refcount, ==, DS_REF_MAX); |
| 2199 | 1287 ASSERT3U(ds->ds_phys->ds_num_children, <=, 1); |
| 1288 ASSERT(ds->ds_prev == NULL || | |
| 1289 ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object); | |
| 1290 ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg); | |
| 1291 | |
|
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1292 /* Remove our reservation */ |
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1293 if (ds->ds_reserved != 0) { |
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1294 uint64_t val = 0; |
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1295 dsl_dataset_set_reservation_sync(ds, &val, cr, tx); |
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1296 ASSERT3U(ds->ds_reserved, ==, 0); |
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1297 } |
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1298 |
| 2199 | 1299 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 1300 | |
| 1301 obj = ds->ds_object; | |
| 789 | 1302 |
| 1303 if (ds->ds_phys->ds_prev_snap_obj != 0) { | |
| 1304 if (ds->ds_prev) { | |
| 1305 ds_prev = ds->ds_prev; | |
| 1306 } else { | |
| 2199 | 1307 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1308 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 2199 | 1309 DS_MODE_NONE, FTAG, &ds_prev)); |
| 789 | 1310 } |
| 1311 after_branch_point = | |
| 1312 (ds_prev->ds_phys->ds_next_snap_obj != obj); | |
| 1313 | |
| 1314 dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); | |
| 1315 if (after_branch_point && | |
| 1316 ds->ds_phys->ds_next_snap_obj == 0) { | |
| 1317 /* This clone is toast. */ | |
| 1318 ASSERT(ds_prev->ds_phys->ds_num_children > 1); | |
| 1319 ds_prev->ds_phys->ds_num_children--; | |
| 1320 } else if (!after_branch_point) { | |
| 1321 ds_prev->ds_phys->ds_next_snap_obj = | |
| 1322 ds->ds_phys->ds_next_snap_obj; | |
| 1323 } | |
| 1324 } | |
| 1325 | |
| 1326 zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
| 1327 | |
| 1328 if (ds->ds_phys->ds_next_snap_obj != 0) { | |
| 2199 | 1329 blkptr_t bp; |
| 789 | 1330 dsl_dataset_t *ds_next; |
| 1331 uint64_t itor = 0; | |
|
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1332 uint64_t old_unique; |
| 789 | 1333 |
| 1334 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 1335 | |
| 2199 | 1336 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1337 ds->ds_phys->ds_next_snap_obj, NULL, |
| 1338 DS_MODE_NONE, FTAG, &ds_next)); | |
| 789 | 1339 ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj); |
| 1340 | |
|
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1341 old_unique = dsl_dataset_unique(ds_next); |
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1342 |
| 789 | 1343 dmu_buf_will_dirty(ds_next->ds_dbuf, tx); |
| 1344 ds_next->ds_phys->ds_prev_snap_obj = | |
| 1345 ds->ds_phys->ds_prev_snap_obj; | |
| 1346 ds_next->ds_phys->ds_prev_snap_txg = | |
| 1347 ds->ds_phys->ds_prev_snap_txg; | |
| 1348 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, | |
| 1349 ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0); | |
| 1350 | |
| 1351 /* | |
| 1352 * Transfer to our deadlist (which will become next's | |
| 1353 * new deadlist) any entries from next's current | |
| 1354 * deadlist which were born before prev, and free the | |
| 1355 * other entries. | |
| 1356 * | |
| 1357 * XXX we're doing this long task with the config lock held | |
| 1358 */ | |
| 1359 while (bplist_iterate(&ds_next->ds_deadlist, &itor, | |
| 1360 &bp) == 0) { | |
| 1361 if (bp.blk_birth <= ds->ds_phys->ds_prev_snap_txg) { | |
| 1544 | 1362 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, |
| 1363 &bp, tx)); | |
| 789 | 1364 if (ds_prev && !after_branch_point && |
| 1365 bp.blk_birth > | |
| 1366 ds_prev->ds_phys->ds_prev_snap_txg) { | |
| 1367 ds_prev->ds_phys->ds_unique_bytes += | |
| 2082 | 1368 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1369 } |
| 1370 } else { | |
| 2082 | 1371 used += bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1372 compressed += BP_GET_PSIZE(&bp); |
| 1373 uncompressed += BP_GET_UCSIZE(&bp); | |
| 1374 /* XXX check return value? */ | |
| 1375 (void) arc_free(zio, dp->dp_spa, tx->tx_txg, | |
| 1376 &bp, NULL, NULL, ARC_NOWAIT); | |
| 1377 } | |
| 1378 } | |
| 1379 | |
| 1380 /* free next's deadlist */ | |
| 1381 bplist_close(&ds_next->ds_deadlist); | |
| 1382 bplist_destroy(mos, ds_next->ds_phys->ds_deadlist_obj, tx); | |
| 1383 | |
| 1384 /* set next's deadlist to our deadlist */ | |
| 1385 ds_next->ds_phys->ds_deadlist_obj = | |
| 1386 ds->ds_phys->ds_deadlist_obj; | |
| 1544 | 1387 VERIFY(0 == bplist_open(&ds_next->ds_deadlist, mos, |
| 1388 ds_next->ds_phys->ds_deadlist_obj)); | |
| 789 | 1389 ds->ds_phys->ds_deadlist_obj = 0; |
| 1390 | |
| 1391 if (ds_next->ds_phys->ds_next_snap_obj != 0) { | |
| 1392 /* | |
| 1393 * Update next's unique to include blocks which | |
| 1394 * were previously shared by only this snapshot | |
| 1395 * and it. Those blocks will be born after the | |
| 1396 * prev snap and before this snap, and will have | |
| 1397 * died after the next snap and before the one | |
| 1398 * after that (ie. be on the snap after next's | |
| 1399 * deadlist). | |
| 1400 * | |
| 1401 * XXX we're doing this long task with the | |
| 1402 * config lock held | |
| 1403 */ | |
| 1404 dsl_dataset_t *ds_after_next; | |
| 1405 | |
| 2199 | 1406 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 789 | 1407 ds_next->ds_phys->ds_next_snap_obj, NULL, |
| 1544 | 1408 DS_MODE_NONE, FTAG, &ds_after_next)); |
| 789 | 1409 itor = 0; |
| 1410 while (bplist_iterate(&ds_after_next->ds_deadlist, | |
| 1411 &itor, &bp) == 0) { | |
| 1412 if (bp.blk_birth > | |
| 1413 ds->ds_phys->ds_prev_snap_txg && | |
| 1414 bp.blk_birth <= | |
| 1415 ds->ds_phys->ds_creation_txg) { | |
| 1416 ds_next->ds_phys->ds_unique_bytes += | |
| 2082 | 1417 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1418 } |
| 1419 } | |
| 1420 | |
| 1421 dsl_dataset_close(ds_after_next, DS_MODE_NONE, FTAG); | |
| 1422 ASSERT3P(ds_next->ds_prev, ==, NULL); | |
| 1423 } else { | |
| 1424 ASSERT3P(ds_next->ds_prev, ==, ds); | |
| 1425 dsl_dataset_close(ds_next->ds_prev, DS_MODE_NONE, | |
| 1426 ds_next); | |
| 1427 if (ds_prev) { | |
| 2199 | 1428 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1544 | 1429 ds->ds_phys->ds_prev_snap_obj, NULL, |
| 1430 DS_MODE_NONE, ds_next, &ds_next->ds_prev)); | |
| 789 | 1431 } else { |
| 1432 ds_next->ds_prev = NULL; | |
| 1433 } | |
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1434 |
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1435 dsl_dataset_recalc_head_uniq(ds_next); |
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1436 |
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1437 /* |
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1438 * Reduce the amount of our unconsmed refreservation |
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1439 * being charged to our parent by the amount of |
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1440 * new unique data we have gained. |
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1441 */ |
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1442 if (old_unique < ds_next->ds_reserved) { |
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1443 int64_t mrsdelta; |
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1444 uint64_t new_unique = |
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1445 ds_next->ds_phys->ds_unique_bytes; |
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1446 |
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1447 ASSERT(old_unique <= new_unique); |
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1448 mrsdelta = MIN(new_unique - old_unique, |
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1449 ds_next->ds_reserved - old_unique); |
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1450 dsl_dir_diduse_space(ds->ds_dir, -mrsdelta, |
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1451 0, 0, tx); |
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1452 } |
| 789 | 1453 } |
| 1454 dsl_dataset_close(ds_next, DS_MODE_NONE, FTAG); | |
| 1455 | |
| 1456 /* | |
|
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1457 * NB: unique_bytes might not be accurate for the head objset. |
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1458 * Before SPA_VERSION 9, we didn't update its value when we |
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1459 * deleted the most recent snapshot. |
| 789 | 1460 */ |
| 1461 ASSERT3U(used, ==, ds->ds_phys->ds_unique_bytes); | |
| 1462 } else { | |
| 1463 /* | |
| 1464 * There's no next snapshot, so this is a head dataset. | |
| 1465 * Destroy the deadlist. Unless it's a clone, the | |
| 1466 * deadlist should be empty. (If it's a clone, it's | |
| 1467 * safe to ignore the deadlist contents.) | |
| 1468 */ | |
| 1469 struct killarg ka; | |
| 1470 | |
| 1471 ASSERT(after_branch_point || bplist_empty(&ds->ds_deadlist)); | |
| 1472 bplist_close(&ds->ds_deadlist); | |
| 1473 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1474 ds->ds_phys->ds_deadlist_obj = 0; | |
| 1475 | |
| 1476 /* | |
| 1477 * Free everything that we point to (that's born after | |
| 1478 * the previous snapshot, if we are a clone) | |
| 1479 * | |
| 1480 * XXX we're doing this long task with the config lock held | |
| 1481 */ | |
| 1482 ka.usedp = &used; | |
| 1483 ka.compressedp = &compressed; | |
| 1484 ka.uncompressedp = &uncompressed; | |
| 1485 ka.zio = zio; | |
| 1486 ka.tx = tx; | |
| 1487 err = traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1488 ADVANCE_POST, kill_blkptr, &ka); | |
| 1489 ASSERT3U(err, ==, 0); | |
|
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1490 ASSERT(spa_version(dp->dp_spa) < |
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1491 SPA_VERSION_UNIQUE_ACCURATE || |
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1492 used == ds->ds_phys->ds_unique_bytes); |
| 789 | 1493 } |
| 1494 | |
| 1495 err = zio_wait(zio); | |
| 1496 ASSERT3U(err, ==, 0); | |
| 1497 | |
| 2199 | 1498 dsl_dir_diduse_space(ds->ds_dir, -used, -compressed, -uncompressed, tx); |
| 789 | 1499 |
| 1500 if (ds->ds_phys->ds_snapnames_zapobj) { | |
| 1501 err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx); | |
| 1502 ASSERT(err == 0); | |
| 1503 } | |
| 1504 | |
| 2199 | 1505 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) { |
| 789 | 1506 /* Erase the link in the dataset */ |
| 2199 | 1507 dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); |
| 1508 ds->ds_dir->dd_phys->dd_head_dataset_obj = 0; | |
| 789 | 1509 /* |
| 1510 * dsl_dir_sync_destroy() called us, they'll destroy | |
| 1511 * the dataset. | |
| 1512 */ | |
| 1513 } else { | |
| 1514 /* remove from snapshot namespace */ | |
| 1515 dsl_dataset_t *ds_head; | |
| 2199 | 1516 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1517 ds->ds_dir->dd_phys->dd_head_dataset_obj, NULL, | |
| 1544 | 1518 DS_MODE_NONE, FTAG, &ds_head)); |
|
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1519 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 1520 #ifdef ZFS_DEBUG |
| 1521 { | |
| 1522 uint64_t val; | |
| 1523 err = zap_lookup(mos, | |
| 1524 ds_head->ds_phys->ds_snapnames_zapobj, | |
| 2199 | 1525 ds->ds_snapname, 8, 1, &val); |
| 789 | 1526 ASSERT3U(err, ==, 0); |
| 1527 ASSERT3U(val, ==, obj); | |
| 1528 } | |
| 1529 #endif | |
| 1530 err = zap_remove(mos, ds_head->ds_phys->ds_snapnames_zapobj, | |
| 2199 | 1531 ds->ds_snapname, tx); |
| 789 | 1532 ASSERT(err == 0); |
| 1533 dsl_dataset_close(ds_head, DS_MODE_NONE, FTAG); | |
| 1534 } | |
| 1535 | |
| 1536 if (ds_prev && ds->ds_prev != ds_prev) | |
| 1537 dsl_dataset_close(ds_prev, DS_MODE_NONE, FTAG); | |
| 1538 | |
| 5094 | 1539 spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx); |
| 4543 | 1540 spa_history_internal_log(LOG_DS_DESTROY, dp->dp_spa, tx, |
| 1541 cr, "dataset = %llu", ds->ds_object); | |
| 1542 | |
| 2199 | 1543 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, tag); |
| 1544 VERIFY(0 == dmu_object_free(mos, obj, tx)); | |
| 3912 | 1545 |
| 2199 | 1546 } |
| 1547 | |
|
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1548 static int |
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1549 dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
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1550 { |
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1551 uint64_t asize; |
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1552 |
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1553 if (!dmu_tx_is_syncing(tx)) |
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1554 return (0); |
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1555 |
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1556 /* |
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1557 * If there's an fs-only reservation, any blocks that might become |
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1558 * owned by the snapshot dataset must be accommodated by space |
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1559 * outside of the reservation. |
|
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|
1560 */ |
|
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|
1561 asize = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
|
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1562 if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, FALSE)) |
|
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1563 return (ENOSPC); |
|
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|
1564 |
|
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|
1565 /* |
|
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|
1566 * Propogate any reserved space for this snapshot to other |
|
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|
1567 * snapshot checks in this sync group. |
|
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|
1568 */ |
|
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|
1569 if (asize > 0) |
|
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|
1570 dsl_dir_willuse_space(ds->ds_dir, asize, tx); |
|
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|
1571 |
|
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|
1572 return (0); |
|
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|
1573 } |
|
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|
1574 |
| 2199 | 1575 /* ARGSUSED */ |
| 1576 int | |
| 1577 dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 1578 { | |
| 5367 | 1579 dsl_dataset_t *ds = arg1; |
| 2199 | 1580 const char *snapname = arg2; |
| 1581 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; | |
| 1582 int err; | |
| 1583 uint64_t value; | |
| 789 | 1584 |
| 1585 /* | |
| 2199 | 1586 * We don't allow multiple snapshots of the same txg. If there |
| 1587 * is already one, try again. | |
| 1588 */ | |
| 1589 if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg) | |
| 1590 return (EAGAIN); | |
| 1591 | |
| 1592 /* | |
| 1593 * Check for conflicting name snapshot name. | |
| 789 | 1594 */ |
| 2199 | 1595 err = zap_lookup(mos, ds->ds_phys->ds_snapnames_zapobj, |
| 1596 snapname, 8, 1, &value); | |
| 1597 if (err == 0) | |
| 1598 return (EEXIST); | |
| 1599 if (err != ENOENT) | |
| 1600 return (err); | |
| 789 | 1601 |
|
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1602 /* |
|
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|
1603 * Check that the dataset's name is not too long. Name consists |
|
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1604 * of the dataset's length + 1 for the @-sign + snapshot name's length |
|
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|
1605 */ |
|
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|
1606 if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN) |
|
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|
1607 return (ENAMETOOLONG); |
|
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|
1608 |
|
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1609 err = dsl_dataset_snapshot_reserve_space(ds, tx); |
|
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1610 if (err) |
|
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|
1611 return (err); |
|
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|
1612 |
| 2199 | 1613 ds->ds_trysnap_txg = tx->tx_txg; |
| 789 | 1614 return (0); |
| 1615 } | |
| 1616 | |
| 2199 | 1617 void |
| 4543 | 1618 dsl_dataset_snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1619 { |
| 5367 | 1620 dsl_dataset_t *ds = arg1; |
| 2199 | 1621 const char *snapname = arg2; |
| 1622 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 789 | 1623 dmu_buf_t *dbuf; |
| 1624 dsl_dataset_phys_t *dsphys; | |
| 2199 | 1625 uint64_t dsobj; |
| 789 | 1626 objset_t *mos = dp->dp_meta_objset; |
| 1627 int err; | |
| 1628 | |
| 1629 spa_scrub_restart(dp->dp_spa, tx->tx_txg); | |
| 2199 | 1630 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 789 | 1631 |
|
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|
1632 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
|
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|
1633 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 1634 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 1635 dmu_buf_will_dirty(dbuf, tx); |
| 1636 dsphys = dbuf->db_data; | |
| 2199 | 1637 dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
| 789 | 1638 dsphys->ds_fsid_guid = unique_create(); |
| 1639 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 1640 sizeof (dsphys->ds_guid)); | |
| 1641 dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj; | |
| 1642 dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg; | |
| 1643 dsphys->ds_next_snap_obj = ds->ds_object; | |
| 1644 dsphys->ds_num_children = 1; | |
| 1645 dsphys->ds_creation_time = gethrestime_sec(); | |
| 1646 dsphys->ds_creation_txg = tx->tx_txg; | |
| 1647 dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj; | |
| 1648 dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes; | |
| 1649 dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes; | |
| 1650 dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 1651 dsphys->ds_flags = ds->ds_phys->ds_flags; |
| 789 | 1652 dsphys->ds_bp = ds->ds_phys->ds_bp; |
| 1544 | 1653 dmu_buf_rele(dbuf, FTAG); |
| 789 | 1654 |
| 2199 | 1655 ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0); |
| 1656 if (ds->ds_prev) { | |
| 1657 ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj == | |
| 789 | 1658 ds->ds_object || |
| 2199 | 1659 ds->ds_prev->ds_phys->ds_num_children > 1); |
| 1660 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { | |
| 1661 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 789 | 1662 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, |
| 2199 | 1663 ds->ds_prev->ds_phys->ds_creation_txg); |
| 1664 ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj; | |
| 789 | 1665 } |
| 1666 } | |
| 1667 | |
|
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1668 /* |
|
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|
1669 * If we have a reference-reservation on this dataset, we will |
|
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1670 * need to increase the amount of refreservation being charged |
|
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1671 * since our unique space is going to zero. |
|
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|
1672 */ |
|
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|
1673 if (ds->ds_reserved) { |
|
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|
1674 int64_t add = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
|
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1675 dsl_dir_diduse_space(ds->ds_dir, add, 0, 0, tx); |
|
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|
1676 } |
|
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|
1677 |
| 789 | 1678 bplist_close(&ds->ds_deadlist); |
| 1679 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
|
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|
1680 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, tx->tx_txg); |
| 789 | 1681 ds->ds_phys->ds_prev_snap_obj = dsobj; |
|
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1682 ds->ds_phys->ds_prev_snap_txg = tx->tx_txg; |
| 789 | 1683 ds->ds_phys->ds_unique_bytes = 0; |
|
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1684 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
|
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|
1685 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 789 | 1686 ds->ds_phys->ds_deadlist_obj = |
| 1687 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1688 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1689 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1690 |
| 1691 dprintf("snap '%s' -> obj %llu\n", snapname, dsobj); | |
| 1692 err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj, | |
| 1693 snapname, 8, 1, &dsobj, tx); | |
| 1694 ASSERT(err == 0); | |
| 1695 | |
| 1696 if (ds->ds_prev) | |
| 1697 dsl_dataset_close(ds->ds_prev, DS_MODE_NONE, ds); | |
| 1544 | 1698 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 1699 ds->ds_phys->ds_prev_snap_obj, snapname, | |
| 1700 DS_MODE_NONE, ds, &ds->ds_prev)); | |
| 4543 | 1701 |
| 1702 spa_history_internal_log(LOG_DS_SNAPSHOT, dp->dp_spa, tx, cr, | |
|
4603
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|
1703 "dataset = %llu", dsobj); |
| 789 | 1704 } |
| 1705 | |
| 1706 void | |
|
3547
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|
1707 dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) |
| 789 | 1708 { |
| 1709 ASSERT(dmu_tx_is_syncing(tx)); | |
| 1710 ASSERT(ds->ds_user_ptr != NULL); | |
| 1711 ASSERT(ds->ds_phys->ds_next_snap_obj == 0); | |
| 1712 | |
| 4787 | 1713 /* |
| 1714 * in case we had to change ds_fsid_guid when we opened it, | |
| 1715 * sync it out now. | |
| 1716 */ | |
| 1717 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1718 ds->ds_phys->ds_fsid_guid = ds->ds_fsid_guid; | |
| 1719 | |
| 789 | 1720 dsl_dir_dirty(ds->ds_dir, tx); |
|
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|
1721 dmu_objset_sync(ds->ds_user_ptr, zio, tx); |
| 789 | 1722 } |
| 1723 | |
| 1724 void | |
| 2885 | 1725 dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) |
| 789 | 1726 { |
|
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1727 uint64_t refd, avail, uobjs, aobjs; |
|
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1728 |
| 2885 | 1729 dsl_dir_stats(ds->ds_dir, nv); |
| 789 | 1730 |
|
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1731 dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); |
|
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1732 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); |
|
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1733 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); |
|
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1734 |
| 2885 | 1735 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, |
| 1736 ds->ds_phys->ds_creation_time); | |
| 1737 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, | |
| 1738 ds->ds_phys->ds_creation_txg); | |
|
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1739 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
|
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1740 ds->ds_quota); |
|
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1741 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, |
|
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1742 ds->ds_reserved); |
| 789 | 1743 |
| 1744 if (ds->ds_phys->ds_next_snap_obj) { | |
| 1745 /* | |
| 1746 * This is a snapshot; override the dd's space used with | |
| 2885 | 1747 * our unique space and compression ratio. |
| 789 | 1748 */ |
| 2885 | 1749 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, |
| 1750 ds->ds_phys->ds_unique_bytes); | |
| 1751 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, | |
| 1752 ds->ds_phys->ds_compressed_bytes == 0 ? 100 : | |
| 1753 (ds->ds_phys->ds_uncompressed_bytes * 100 / | |
| 1754 ds->ds_phys->ds_compressed_bytes)); | |
| 789 | 1755 } |
| 1756 } | |
| 1757 | |
| 2885 | 1758 void |
| 1759 dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
| 789 | 1760 { |
| 2885 | 1761 stat->dds_creation_txg = ds->ds_phys->ds_creation_txg; |
| 1762 stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT; | |
| 5367 | 1763 stat->dds_guid = ds->ds_phys->ds_guid; |
| 2885 | 1764 if (ds->ds_phys->ds_next_snap_obj) { |
| 1765 stat->dds_is_snapshot = B_TRUE; | |
| 1766 stat->dds_num_clones = ds->ds_phys->ds_num_children - 1; | |
| 1767 } | |
| 1768 | |
| 1769 /* clone origin is really a dsl_dir thing... */ | |
| 5446 | 1770 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); |
| 5367 | 1771 if (ds->ds_dir->dd_phys->dd_origin_obj) { |
| 2885 | 1772 dsl_dataset_t *ods; |
| 1773 | |
| 1774 VERIFY(0 == dsl_dataset_open_obj(ds->ds_dir->dd_pool, | |
| 5367 | 1775 ds->ds_dir->dd_phys->dd_origin_obj, |
| 2885 | 1776 NULL, DS_MODE_NONE, FTAG, &ods)); |
| 5367 | 1777 dsl_dataset_name(ods, stat->dds_origin); |
| 2885 | 1778 dsl_dataset_close(ods, DS_MODE_NONE, FTAG); |
| 1779 } | |
| 5446 | 1780 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); |
| 2885 | 1781 } |
| 1782 | |
| 1783 uint64_t | |
| 1784 dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
| 1785 { | |
| 4787 | 1786 return (ds->ds_fsid_guid); |
| 2885 | 1787 } |
| 1788 | |
| 1789 void | |
| 1790 dsl_dataset_space(dsl_dataset_t *ds, | |
| 1791 uint64_t *refdbytesp, uint64_t *availbytesp, | |
| 1792 uint64_t *usedobjsp, uint64_t *availobjsp) | |
| 1793 { | |
| 1794 *refdbytesp = ds->ds_phys->ds_used_bytes; | |
| 1795 *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); | |
|
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1796 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) |
|
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1797 *availbytesp += ds->ds_reserved - ds->ds_phys->ds_unique_bytes; |
|
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1798 if (ds->ds_quota != 0) { |
|
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1799 /* |
|
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1800 * Adjust available bytes according to refquota |
|
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|
1801 */ |
|
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1802 if (*refdbytesp < ds->ds_quota) |
|
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1803 *availbytesp = MIN(*availbytesp, |
|
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1804 ds->ds_quota - *refdbytesp); |
|
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|
1805 else |
|
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1806 *availbytesp = 0; |
|
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1807 } |
| 2885 | 1808 *usedobjsp = ds->ds_phys->ds_bp.blk_fill; |
| 1809 *availobjsp = DN_MAX_OBJECT - *usedobjsp; | |
| 789 | 1810 } |
| 1811 | |
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1812 boolean_t |
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1813 dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds) |
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1814 { |
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1815 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
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1816 |
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1817 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || |
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1818 dsl_pool_sync_context(dp)); |
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1819 if (ds->ds_prev == NULL) |
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1820 return (B_FALSE); |
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1821 if (ds->ds_phys->ds_bp.blk_birth > |
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1822 ds->ds_prev->ds_phys->ds_creation_txg) |
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1823 return (B_TRUE); |
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1824 return (B_FALSE); |
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1825 } |
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1826 |
| 2199 | 1827 /* ARGSUSED */ |
| 789 | 1828 static int |
| 2199 | 1829 dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 789 | 1830 { |
| 2199 | 1831 dsl_dataset_t *ds = arg1; |
| 1832 char *newsnapname = arg2; | |
| 1833 dsl_dir_t *dd = ds->ds_dir; | |
| 789 | 1834 objset_t *mos = dd->dd_pool->dp_meta_objset; |
| 2199 | 1835 dsl_dataset_t *hds; |
| 1836 uint64_t val; | |
| 789 | 1837 int err; |
| 1838 | |
| 2199 | 1839 err = dsl_dataset_open_obj(dd->dd_pool, |
| 1840 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds); | |
| 789 | 1841 if (err) |
| 1842 return (err); | |
| 1843 | |
| 2199 | 1844 /* new name better not be in use */ |
| 1845 err = zap_lookup(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1846 newsnapname, 8, 1, &val); | |
| 1847 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); | |
| 789 | 1848 |
| 2199 | 1849 if (err == 0) |
| 1850 err = EEXIST; | |
| 1851 else if (err == ENOENT) | |
| 1852 err = 0; | |
| 4007 | 1853 |
| 1854 /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
| 1855 if (dsl_dir_namelen(ds->ds_dir) + 1 + strlen(newsnapname) >= MAXNAMELEN) | |
| 1856 err = ENAMETOOLONG; | |
| 1857 | |
| 2199 | 1858 return (err); |
| 1859 } | |
| 789 | 1860 |
| 2199 | 1861 static void |
| 4543 | 1862 dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, |
| 1863 cred_t *cr, dmu_tx_t *tx) | |
| 2199 | 1864 { |
| 1865 dsl_dataset_t *ds = arg1; | |
| 4543 | 1866 const char *newsnapname = arg2; |
| 2199 | 1867 dsl_dir_t *dd = ds->ds_dir; |
| 1868 objset_t *mos = dd->dd_pool->dp_meta_objset; | |
| 1869 dsl_dataset_t *hds; | |
| 1870 int err; | |
| 789 | 1871 |
| 2199 | 1872 ASSERT(ds->ds_phys->ds_next_snap_obj != 0); |
| 789 | 1873 |
| 2199 | 1874 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, |
| 1875 dd->dd_phys->dd_head_dataset_obj, NULL, DS_MODE_NONE, FTAG, &hds)); | |
| 789 | 1876 |
| 2199 | 1877 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 1878 err = zap_remove(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1879 ds->ds_snapname, tx); | |
| 789 | 1880 ASSERT3U(err, ==, 0); |
| 2199 | 1881 mutex_enter(&ds->ds_lock); |
| 1882 (void) strcpy(ds->ds_snapname, newsnapname); | |
| 1883 mutex_exit(&ds->ds_lock); | |
| 1884 err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 1885 ds->ds_snapname, 8, 1, &ds->ds_object, tx); | |
| 789 | 1886 ASSERT3U(err, ==, 0); |
| 1887 | |
| 4543 | 1888 spa_history_internal_log(LOG_DS_RENAME, dd->dd_pool->dp_spa, tx, |
| 1889 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1890 dsl_dataset_close(hds, DS_MODE_NONE, FTAG); |
| 789 | 1891 } |
| 1892 | |
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1893 struct renamesnaparg { |
| 4007 | 1894 dsl_sync_task_group_t *dstg; |
| 1895 char failed[MAXPATHLEN]; | |
| 1896 char *oldsnap; | |
| 1897 char *newsnap; | |
| 1898 }; | |
| 1899 | |
| 1900 static int | |
| 1901 dsl_snapshot_rename_one(char *name, void *arg) | |
| 1902 { | |
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1903 struct renamesnaparg *ra = arg; |
| 4007 | 1904 dsl_dataset_t *ds = NULL; |
| 1905 char *cp; | |
| 1906 int err; | |
| 1907 | |
| 1908 cp = name + strlen(name); | |
| 1909 *cp = '@'; | |
| 1910 (void) strcpy(cp + 1, ra->oldsnap); | |
| 4543 | 1911 |
| 1912 /* | |
| 1913 * For recursive snapshot renames the parent won't be changing | |
| 1914 * so we just pass name for both the to/from argument. | |
| 1915 */ | |
| 1916 if (err = zfs_secpolicy_rename_perms(name, name, CRED())) { | |
| 1917 (void) strcpy(ra->failed, name); | |
| 1918 return (err); | |
| 1919 } | |
| 1920 | |
| 4007 | 1921 err = dsl_dataset_open(name, DS_MODE_READONLY | DS_MODE_STANDARD, |
| 1922 ra->dstg, &ds); | |
| 1923 if (err == ENOENT) { | |
| 1924 *cp = '\0'; | |
| 1925 return (0); | |
| 1926 } | |
| 1927 if (err) { | |
| 1928 (void) strcpy(ra->failed, name); | |
| 1929 *cp = '\0'; | |
| 1930 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 1931 return (err); | |
| 1932 } | |
| 1933 | |
| 1934 #ifdef _KERNEL | |
| 1935 /* for all filesystems undergoing rename, we'll need to unmount it */ | |
| 1936 (void) zfs_unmount_snap(name, NULL); | |
| 1937 #endif | |
| 1938 | |
| 1939 *cp = '\0'; | |
| 1940 | |
| 1941 dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check, | |
| 1942 dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0); | |
| 1943 | |
| 1944 return (0); | |
| 1945 } | |
| 1946 | |
| 1947 static int | |
| 1948 dsl_recursive_rename(char *oldname, const char *newname) | |
| 1949 { | |
| 1950 int err; | |
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1951 struct renamesnaparg *ra; |
| 4007 | 1952 dsl_sync_task_t *dst; |
| 1953 spa_t *spa; | |
| 1954 char *cp, *fsname = spa_strdup(oldname); | |
| 1955 int len = strlen(oldname); | |
| 1956 | |
| 1957 /* truncate the snapshot name to get the fsname */ | |
| 1958 cp = strchr(fsname, '@'); | |
| 1959 *cp = '\0'; | |
| 1960 | |
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1961 err = spa_open(fsname, &spa, FTAG); |
| 4007 | 1962 if (err) { |
| 1963 kmem_free(fsname, len + 1); | |
| 1964 return (err); | |
| 1965 } | |
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1966 ra = kmem_alloc(sizeof (struct renamesnaparg), KM_SLEEP); |
| 4007 | 1967 ra->dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); |
| 1968 | |
| 1969 ra->oldsnap = strchr(oldname, '@') + 1; | |
| 1970 ra->newsnap = strchr(newname, '@') + 1; | |
| 1971 *ra->failed = '\0'; | |
| 1972 | |
| 1973 err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra, | |
| 1974 DS_FIND_CHILDREN); | |
| 1975 kmem_free(fsname, len + 1); | |
| 1976 | |
| 1977 if (err == 0) { | |
| 1978 err = dsl_sync_task_group_wait(ra->dstg); | |
| 1979 } | |
| 1980 | |
| 1981 for (dst = list_head(&ra->dstg->dstg_tasks); dst; | |
| 1982 dst = list_next(&ra->dstg->dstg_tasks, dst)) { | |
| 1983 dsl_dataset_t *ds = dst->dst_arg1; | |
| 1984 if (dst->dst_err) { | |
| 1985 dsl_dir_name(ds->ds_dir, ra->failed); | |
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1986 (void) strcat(ra->failed, "@"); |
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1987 (void) strcat(ra->failed, ra->newsnap); |
| 4007 | 1988 } |
| 1989 dsl_dataset_close(ds, DS_MODE_STANDARD, ra->dstg); | |
| 1990 } | |
| 1991 | |
| 4543 | 1992 if (err) |
| 1993 (void) strcpy(oldname, ra->failed); | |
| 4007 | 1994 |
| 1995 dsl_sync_task_group_destroy(ra->dstg); | |
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1996 kmem_free(ra, sizeof (struct renamesnaparg)); |
| 4007 | 1997 spa_close(spa, FTAG); |
| 1998 return (err); | |
| 1999 } | |
| 2000 | |
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2001 static int |
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2002 dsl_valid_rename(char *oldname, void *arg) |
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2003 { |
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2004 int delta = *(int *)arg; |
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2005 |
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2006 if (strlen(oldname) + delta >= MAXNAMELEN) |
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2007 return (ENAMETOOLONG); |
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2008 |
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2009 return (0); |
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2010 } |
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2011 |
| 789 | 2012 #pragma weak dmu_objset_rename = dsl_dataset_rename |
| 2013 int | |
| 4007 | 2014 dsl_dataset_rename(char *oldname, const char *newname, |
| 2015 boolean_t recursive) | |
| 789 | 2016 { |
| 2017 dsl_dir_t *dd; | |
| 2199 | 2018 dsl_dataset_t *ds; |
| 789 | 2019 const char *tail; |
| 2020 int err; | |
| 2021 | |
| 2199 | 2022 err = dsl_dir_open(oldname, FTAG, &dd, &tail); |
| 1544 | 2023 if (err) |
| 2024 return (err); | |
| 789 | 2025 if (tail == NULL) { |
|
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2026 int delta = strlen(newname) - strlen(oldname); |
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2027 |
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2028 /* if we're growing, validate child size lengths */ |
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2029 if (delta > 0) |
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2030 err = dmu_objset_find(oldname, dsl_valid_rename, |
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2031 &delta, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS); |
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2032 |
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2033 if (!err) |
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2034 err = dsl_dir_rename(dd, newname); |
| 789 | 2035 dsl_dir_close(dd, FTAG); |
| 2036 return (err); | |
| 2037 } | |
| 2038 if (tail[0] != '@') { | |
| 2039 /* the name ended in a nonexistant component */ | |
| 2040 dsl_dir_close(dd, FTAG); | |
| 2041 return (ENOENT); | |
| 2042 } | |
| 2043 | |
| 2199 | 2044 dsl_dir_close(dd, FTAG); |
| 2045 | |
| 2046 /* new name must be snapshot in same filesystem */ | |
| 2047 tail = strchr(newname, '@'); | |
| 2048 if (tail == NULL) | |
| 2049 return (EINVAL); | |
| 2050 tail++; | |
| 2051 if (strncmp(oldname, newname, tail - newname) != 0) | |
| 2052 return (EXDEV); | |
| 789 | 2053 |
| 4007 | 2054 if (recursive) { |
| 2055 err = dsl_recursive_rename(oldname, newname); | |
| 2056 } else { | |
| 2057 err = dsl_dataset_open(oldname, | |
| 2058 DS_MODE_READONLY | DS_MODE_STANDARD, FTAG, &ds); | |
| 2059 if (err) | |
| 2060 return (err); | |
| 2199 | 2061 |
| 4007 | 2062 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2063 dsl_dataset_snapshot_rename_check, | |
| 2064 dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1); | |
| 2199 | 2065 |
| 4007 | 2066 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
| 2067 } | |
| 2199 | 2068 |
| 789 | 2069 return (err); |
| 2070 } | |
| 2082 | 2071 |
| 2199 | 2072 struct promotearg { |
| 2073 uint64_t used, comp, uncomp, unique; | |
| 2074 uint64_t newnext_obj, snapnames_obj; | |
| 2075 }; | |
| 2076 | |
| 4543 | 2077 /* ARGSUSED */ |
| 2082 | 2078 static int |
| 2199 | 2079 dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 2082 | 2080 { |
| 2199 | 2081 dsl_dataset_t *hds = arg1; |
| 2082 struct promotearg *pa = arg2; | |
| 2083 dsl_dir_t *dd = hds->ds_dir; | |
| 2084 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2085 dsl_dir_t *odd = NULL; |
| 2082 | 2086 dsl_dataset_t *ds = NULL; |
| 5367 | 2087 dsl_dataset_t *origin_ds = NULL; |
| 2082 | 2088 dsl_dataset_t *newnext_ds = NULL; |
| 2089 int err; | |
| 2090 char *name = NULL; | |
| 2199 | 2091 uint64_t itor = 0; |
| 2082 | 2092 blkptr_t bp; |
| 2093 | |
| 2199 | 2094 bzero(pa, sizeof (*pa)); |
| 2095 | |
| 2082 | 2096 /* Check that it is a clone */ |
| 5367 | 2097 if (dd->dd_phys->dd_origin_obj == 0) |
| 2082 | 2098 return (EINVAL); |
| 2099 | |
| 2199 | 2100 /* Since this is so expensive, don't do the preliminary check */ |
| 2101 if (!dmu_tx_is_syncing(tx)) | |
| 2102 return (0); | |
| 2103 | |
| 5367 | 2104 if (err = dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
| 2105 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)) | |
| 2082 | 2106 goto out; |
| 5367 | 2107 odd = origin_ds->ds_dir; |
| 2199 | 2108 |
| 2109 { | |
| 2110 dsl_dataset_t *phds; | |
| 2111 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 5367 | 2112 odd->dd_phys->dd_head_dataset_obj, |
| 2199 | 2113 NULL, DS_MODE_NONE, FTAG, &phds)) |
| 2114 goto out; | |
| 2115 pa->snapnames_obj = phds->ds_phys->ds_snapnames_zapobj; | |
| 2116 dsl_dataset_close(phds, DS_MODE_NONE, FTAG); | |
| 2117 } | |
| 2082 | 2118 |
| 2119 if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE) { | |
| 2120 err = EXDEV; | |
| 2121 goto out; | |
| 2122 } | |
| 2123 | |
| 5367 | 2124 /* find origin's new next ds */ |
| 2082 | 2125 VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, hds->ds_object, |
| 2126 NULL, DS_MODE_NONE, FTAG, &newnext_ds)); | |
| 5367 | 2127 while (newnext_ds->ds_phys->ds_prev_snap_obj != origin_ds->ds_object) { |
| 2082 | 2128 dsl_dataset_t *prev; |
| 2129 | |
| 2130 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 2199 | 2131 newnext_ds->ds_phys->ds_prev_snap_obj, |
| 2132 NULL, DS_MODE_NONE, FTAG, &prev)) | |
| 2082 | 2133 goto out; |
| 2134 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 2135 newnext_ds = prev; | |
| 2136 } | |
| 2199 | 2137 pa->newnext_obj = newnext_ds->ds_object; |
| 2082 | 2138 |
| 5367 | 2139 /* compute origin's new unique space */ |
| 2082 | 2140 while ((err = bplist_iterate(&newnext_ds->ds_deadlist, |
| 2141 &itor, &bp)) == 0) { | |
| 5367 | 2142 if (bp.blk_birth > origin_ds->ds_phys->ds_prev_snap_txg) |
| 2199 | 2143 pa->unique += bp_get_dasize(dd->dd_pool->dp_spa, &bp); |
| 2082 | 2144 } |
| 2145 if (err != ENOENT) | |
| 2146 goto out; | |
| 2147 | |
| 2148 /* Walk the snapshots that we are moving */ | |
| 2149 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); | |
| 5367 | 2150 ds = origin_ds; |
| 2082 | 2151 /* CONSTCOND */ |
| 2152 while (TRUE) { | |
| 2153 uint64_t val, dlused, dlcomp, dluncomp; | |
| 2154 dsl_dataset_t *prev; | |
| 2155 | |
| 2156 /* Check that the snapshot name does not conflict */ | |
| 2157 dsl_dataset_name(ds, name); | |
| 2158 err = zap_lookup(dd->dd_pool->dp_meta_objset, | |
| 2159 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, | |
| 2160 8, 1, &val); | |
| 2161 if (err != ENOENT) { | |
| 2162 if (err == 0) | |
| 2163 err = EEXIST; | |
| 2164 goto out; | |
| 2165 } | |
| 2166 | |
| 2167 /* | |
| 2168 * compute space to transfer. Each snapshot gave birth to: | |
| 2169 * (my used) - (prev's used) + (deadlist's used) | |
| 2170 */ | |
| 2199 | 2171 pa->used += ds->ds_phys->ds_used_bytes; |
| 2172 pa->comp += ds->ds_phys->ds_compressed_bytes; | |
| 2173 pa->uncomp += ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 2174 |
| 2175 /* If we reach the first snapshot, we're done. */ | |
| 2176 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 2177 break; | |
| 2178 | |
| 2179 if (err = bplist_space(&ds->ds_deadlist, | |
| 2180 &dlused, &dlcomp, &dluncomp)) | |
| 2181 goto out; | |
| 2182 if (err = dsl_dataset_open_obj(dd->dd_pool, | |
| 2183 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, | |
| 2184 FTAG, &prev)) | |
| 2185 goto out; | |
| 2199 | 2186 pa->used += dlused - prev->ds_phys->ds_used_bytes; |
| 2187 pa->comp += dlcomp - prev->ds_phys->ds_compressed_bytes; | |
| 2188 pa->uncomp += dluncomp - prev->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 2189 |
| 2190 /* | |
| 2191 * We could be a clone of a clone. If we reach our | |
| 2192 * parent's branch point, we're done. | |
| 2193 */ | |
| 2194 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 2195 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 2196 break; | |
| 2197 } | |
| 5367 | 2198 if (ds != origin_ds) |
| 2082 | 2199 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2200 ds = prev; | |
| 2201 } | |
| 2202 | |
| 2203 /* Check that there is enough space here */ | |
| 5367 | 2204 err = dsl_dir_transfer_possible(odd, dd, pa->used); |
| 2199 | 2205 |
| 2206 out: | |
| 5367 | 2207 if (ds && ds != origin_ds) |
| 2199 | 2208 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 5367 | 2209 if (origin_ds) |
| 2210 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 2199 | 2211 if (newnext_ds) |
| 2212 dsl_dataset_close(newnext_ds, DS_MODE_NONE, FTAG); | |
| 2213 if (name) | |
| 2214 kmem_free(name, MAXPATHLEN); | |
| 2215 return (err); | |
| 2216 } | |
| 2082 | 2217 |
| 2199 | 2218 static void |
| 4543 | 2219 dsl_dataset_promote_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 2220 { |
| 2221 dsl_dataset_t *hds = arg1; | |
| 2222 struct promotearg *pa = arg2; | |
| 2223 dsl_dir_t *dd = hds->ds_dir; | |
| 2224 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2225 dsl_dir_t *odd = NULL; |
| 2226 dsl_dataset_t *ds, *origin_ds; | |
| 2199 | 2227 char *name; |
| 2228 | |
| 5367 | 2229 ASSERT(dd->dd_phys->dd_origin_obj != 0); |
| 2199 | 2230 ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)); |
| 2231 | |
| 5367 | 2232 VERIFY(0 == dsl_dataset_open_obj(dp, dd->dd_phys->dd_origin_obj, |
| 2233 NULL, DS_MODE_EXCLUSIVE, FTAG, &origin_ds)); | |
| 2417 | 2234 /* |
| 5367 | 2235 * We need to explicitly open odd, since origin_ds's dd will be |
| 2417 | 2236 * changing. |
| 2237 */ | |
| 5367 | 2238 VERIFY(0 == dsl_dir_open_obj(dp, origin_ds->ds_dir->dd_object, |
| 2239 NULL, FTAG, &odd)); | |
| 2082 | 2240 |
| 2241 /* move snapshots to this dir */ | |
| 2199 | 2242 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
| 5367 | 2243 ds = origin_ds; |
| 2082 | 2244 /* CONSTCOND */ |
| 2245 while (TRUE) { | |
| 2246 dsl_dataset_t *prev; | |
| 2247 | |
| 2248 /* move snap name entry */ | |
| 2249 dsl_dataset_name(ds, name); | |
| 2199 | 2250 VERIFY(0 == zap_remove(dp->dp_meta_objset, |
| 2251 pa->snapnames_obj, ds->ds_snapname, tx)); | |
| 2252 VERIFY(0 == zap_add(dp->dp_meta_objset, | |
| 2082 | 2253 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, |
| 2254 8, 1, &ds->ds_object, tx)); | |
| 2255 | |
| 2256 /* change containing dsl_dir */ | |
| 2257 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 5367 | 2258 ASSERT3U(ds->ds_phys->ds_dir_obj, ==, odd->dd_object); |
| 2082 | 2259 ds->ds_phys->ds_dir_obj = dd->dd_object; |
| 5367 | 2260 ASSERT3P(ds->ds_dir, ==, odd); |
| 2082 | 2261 dsl_dir_close(ds->ds_dir, ds); |
| 2199 | 2262 VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, |
| 2082 | 2263 NULL, ds, &ds->ds_dir)); |
| 2264 | |
| 2265 ASSERT3U(dsl_prop_numcb(ds), ==, 0); | |
| 2266 | |
| 2267 if (ds->ds_phys->ds_prev_snap_obj == 0) | |
| 2268 break; | |
| 2269 | |
| 2199 | 2270 VERIFY(0 == dsl_dataset_open_obj(dp, |
| 2082 | 2271 ds->ds_phys->ds_prev_snap_obj, NULL, DS_MODE_EXCLUSIVE, |
| 2272 FTAG, &prev)); | |
| 2273 | |
| 2274 if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) { | |
| 2275 dsl_dataset_close(prev, DS_MODE_EXCLUSIVE, FTAG); | |
| 2276 break; | |
| 2277 } | |
| 5367 | 2278 if (ds != origin_ds) |
| 2082 | 2279 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2280 ds = prev; | |
| 2281 } | |
| 5367 | 2282 if (ds != origin_ds) |
| 2199 | 2283 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG); |
| 2082 | 2284 |
| 5367 | 2285 /* change origin's next snap */ |
| 2286 dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); | |
| 2287 origin_ds->ds_phys->ds_next_snap_obj = pa->newnext_obj; | |
| 2082 | 2288 |
| 5367 | 2289 /* change origin */ |
| 2082 | 2290 dmu_buf_will_dirty(dd->dd_dbuf, tx); |
| 5367 | 2291 ASSERT3U(dd->dd_phys->dd_origin_obj, ==, origin_ds->ds_object); |
| 2292 dd->dd_phys->dd_origin_obj = odd->dd_phys->dd_origin_obj; | |
| 2293 dmu_buf_will_dirty(odd->dd_dbuf, tx); | |
| 2294 odd->dd_phys->dd_origin_obj = origin_ds->ds_object; | |
| 2082 | 2295 |
| 2296 /* change space accounting */ | |
| 5367 | 2297 dsl_dir_diduse_space(odd, -pa->used, -pa->comp, -pa->uncomp, tx); |
| 2199 | 2298 dsl_dir_diduse_space(dd, pa->used, pa->comp, pa->uncomp, tx); |
| 5367 | 2299 origin_ds->ds_phys->ds_unique_bytes = pa->unique; |
| 2082 | 2300 |
| 4543 | 2301 /* log history record */ |
| 2302 spa_history_internal_log(LOG_DS_PROMOTE, dd->dd_pool->dp_spa, tx, | |
| 2303 cr, "dataset = %llu", ds->ds_object); | |
| 2304 | |
| 5367 | 2305 dsl_dir_close(odd, FTAG); |
| 2306 dsl_dataset_close(origin_ds, DS_MODE_EXCLUSIVE, FTAG); | |
| 2199 | 2307 kmem_free(name, MAXPATHLEN); |
| 2082 | 2308 } |
| 2309 | |
| 2310 int | |
| 2311 dsl_dataset_promote(const char *name) | |
| 2312 { | |
| 2313 dsl_dataset_t *ds; | |
| 2314 int err; | |
| 2315 dmu_object_info_t doi; | |
| 2199 | 2316 struct promotearg pa; |
| 2082 | 2317 |
| 2318 err = dsl_dataset_open(name, DS_MODE_NONE, FTAG, &ds); | |
| 2319 if (err) | |
| 2320 return (err); | |
| 2321 | |
| 2322 err = dmu_object_info(ds->ds_dir->dd_pool->dp_meta_objset, | |
| 2323 ds->ds_phys->ds_snapnames_zapobj, &doi); | |
| 2324 if (err) { | |
| 2325 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 2326 return (err); | |
| 2327 } | |
| 2328 | |
| 2329 /* | |
| 2330 * Add in 128x the snapnames zapobj size, since we will be moving | |
| 2331 * a bunch of snapnames to the promoted ds, and dirtying their | |
| 2332 * bonus buffers. | |
| 2333 */ | |
| 2199 | 2334 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2335 dsl_dataset_promote_check, | |
| 2336 dsl_dataset_promote_sync, ds, &pa, 2 + 2 * doi.doi_physical_blks); | |
| 2082 | 2337 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); |
| 2338 return (err); | |
| 2339 } | |
| 3912 | 2340 |
| 5367 | 2341 struct cloneswaparg { |
| 2342 dsl_dataset_t *cds; /* clone dataset */ | |
| 2343 dsl_dataset_t *ohds; /* origin's head dataset */ | |
| 2344 boolean_t force; | |
|
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2345 int64_t unused_refres_delta; /* change in unconsumed refreservation */ |
| 5367 | 2346 }; |
|
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2347 |
|
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2348 /* ARGSUSED */ |
|
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2349 static int |
|
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2350 dsl_dataset_clone_swap_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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2351 { |
| 5367 | 2352 struct cloneswaparg *csa = arg1; |
|
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2353 |
| 5367 | 2354 /* they should both be heads */ |
| 2355 if (dsl_dataset_is_snapshot(csa->cds) || | |
| 2356 dsl_dataset_is_snapshot(csa->ohds)) | |
|
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2357 return (EINVAL); |
|
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2358 |
| 5367 | 2359 /* the branch point should be just before them */ |
| 2360 if (csa->cds->ds_prev != csa->ohds->ds_prev) | |
|
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2361 return (EINVAL); |
|
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2362 |
| 5367 | 2363 /* cds should be the clone */ |
| 2364 if (csa->cds->ds_prev->ds_phys->ds_next_snap_obj != | |
| 2365 csa->ohds->ds_object) | |
| 2366 return (EINVAL); | |
|
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2367 |
| 5367 | 2368 /* the clone should be a child of the origin */ |
| 2369 if (csa->cds->ds_dir->dd_parent != csa->ohds->ds_dir) | |
| 2370 return (EINVAL); | |
|
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2371 |
| 5367 | 2372 /* ohds shouldn't be modified unless 'force' */ |
| 2373 if (!csa->force && dsl_dataset_modified_since_lastsnap(csa->ohds)) | |
| 2374 return (ETXTBSY); | |
|
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2375 |
|
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2376 /* adjust amount of any unconsumed refreservation */ |
|
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2377 csa->unused_refres_delta = |
|
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2378 (int64_t)MIN(csa->ohds->ds_reserved, |
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2379 csa->ohds->ds_phys->ds_unique_bytes) - |
|
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2380 (int64_t)MIN(csa->ohds->ds_reserved, |
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2381 csa->cds->ds_phys->ds_unique_bytes); |
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2382 |
|
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2383 if (csa->unused_refres_delta > 0 && |
|
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2384 csa->unused_refres_delta > |
|
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2385 dsl_dir_space_available(csa->ohds->ds_dir, NULL, 0, TRUE)) |
|
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2386 return (ENOSPC); |
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2387 |
| 5367 | 2388 return (0); |
|
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2389 } |
|
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2390 |
|
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2391 /* ARGSUSED */ |
|
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2392 static void |
|
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2393 dsl_dataset_clone_swap_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
|
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2394 { |
| 5367 | 2395 struct cloneswaparg *csa = arg1; |
| 2396 dsl_pool_t *dp = csa->cds->ds_dir->dd_pool; | |
|
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2397 uint64_t itor = 0; |
|
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2398 blkptr_t bp; |
|
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2399 uint64_t unique = 0; |
|
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2400 int err; |
|
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2401 |
|
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2402 ASSERT(csa->cds->ds_reserved == 0); |
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2403 ASSERT(csa->cds->ds_quota == csa->ohds->ds_quota); |
|
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2404 |
| 5367 | 2405 dmu_buf_will_dirty(csa->cds->ds_dbuf, tx); |
| 2406 dmu_buf_will_dirty(csa->ohds->ds_dbuf, tx); | |
| 2407 dmu_buf_will_dirty(csa->cds->ds_prev->ds_dbuf, tx); | |
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2408 |
| 5367 | 2409 if (csa->cds->ds_user_ptr != NULL) { |
| 2410 csa->cds->ds_user_evict_func(csa->cds, csa->cds->ds_user_ptr); | |
| 2411 csa->cds->ds_user_ptr = NULL; | |
| 2412 } | |
|
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2413 |
| 5367 | 2414 if (csa->ohds->ds_user_ptr != NULL) { |
| 2415 csa->ohds->ds_user_evict_func(csa->ohds, | |
| 2416 csa->ohds->ds_user_ptr); | |
| 2417 csa->ohds->ds_user_ptr = NULL; | |
| 2418 } | |
|
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2419 |
|
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2420 /* compute unique space */ |
| 5367 | 2421 while ((err = bplist_iterate(&csa->cds->ds_deadlist, |
| 2422 &itor, &bp)) == 0) { | |
| 2423 if (bp.blk_birth > csa->cds->ds_prev->ds_phys->ds_prev_snap_txg) | |
| 2424 unique += bp_get_dasize(dp->dp_spa, &bp); | |
|
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2425 } |
|
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2426 VERIFY(err == ENOENT); |
|
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2427 |
|
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2428 /* reset origin's unique bytes */ |
| 5367 | 2429 csa->cds->ds_prev->ds_phys->ds_unique_bytes = unique; |
|
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2430 |
|
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2431 /* swap blkptrs */ |
|
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2432 { |
|
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2433 blkptr_t tmp; |
| 5367 | 2434 tmp = csa->ohds->ds_phys->ds_bp; |
| 2435 csa->ohds->ds_phys->ds_bp = csa->cds->ds_phys->ds_bp; | |
| 2436 csa->cds->ds_phys->ds_bp = tmp; | |
|
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2437 } |
|
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2438 |
|
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2439 /* set dd_*_bytes */ |
|
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2440 { |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
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diff
changeset
|
2441 int64_t dused, dcomp, duncomp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
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diff
changeset
|
2442 uint64_t cdl_used, cdl_comp, cdl_uncomp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2443 uint64_t odl_used, odl_comp, odl_uncomp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2444 |
| 5367 | 2445 VERIFY(0 == bplist_space(&csa->cds->ds_deadlist, &cdl_used, |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
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5094
diff
changeset
|
2446 &cdl_comp, &cdl_uncomp)); |
| 5367 | 2447 VERIFY(0 == bplist_space(&csa->ohds->ds_deadlist, &odl_used, |
|
5326
6752aa2bd5bc
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ek110237
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5094
diff
changeset
|
2448 &odl_comp, &odl_uncomp)); |
| 5367 | 2449 dused = csa->cds->ds_phys->ds_used_bytes + cdl_used - |
| 2450 (csa->ohds->ds_phys->ds_used_bytes + odl_used); | |
| 2451 dcomp = csa->cds->ds_phys->ds_compressed_bytes + cdl_comp - | |
| 2452 (csa->ohds->ds_phys->ds_compressed_bytes + odl_comp); | |
| 2453 duncomp = csa->cds->ds_phys->ds_uncompressed_bytes + | |
| 2454 cdl_uncomp - | |
| 2455 (csa->ohds->ds_phys->ds_uncompressed_bytes + odl_uncomp); | |
|
5326
6752aa2bd5bc
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ek110237
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5094
diff
changeset
|
2456 |
| 5367 | 2457 dsl_dir_diduse_space(csa->ohds->ds_dir, |
| 2458 dused, dcomp, duncomp, tx); | |
| 2459 dsl_dir_diduse_space(csa->cds->ds_dir, | |
| 2460 -dused, -dcomp, -duncomp, tx); | |
| 2461 } | |
| 2462 | |
| 2463 #define SWITCH64(x, y) \ | |
| 2464 { \ | |
| 2465 uint64_t __tmp = (x); \ | |
| 2466 (x) = (y); \ | |
| 2467 (y) = __tmp; \ | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
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5094
diff
changeset
|
2468 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
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5094
diff
changeset
|
2469 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2470 /* swap ds_*_bytes */ |
| 5367 | 2471 SWITCH64(csa->ohds->ds_phys->ds_used_bytes, |
| 2472 csa->cds->ds_phys->ds_used_bytes); | |
| 2473 SWITCH64(csa->ohds->ds_phys->ds_compressed_bytes, | |
| 2474 csa->cds->ds_phys->ds_compressed_bytes); | |
| 2475 SWITCH64(csa->ohds->ds_phys->ds_uncompressed_bytes, | |
| 2476 csa->cds->ds_phys->ds_uncompressed_bytes); | |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2477 SWITCH64(csa->ohds->ds_phys->ds_unique_bytes, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2478 csa->cds->ds_phys->ds_unique_bytes); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2479 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2480 /* apply any parent delta for change in unconsumed refreservation */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2481 dsl_dir_diduse_space(csa->ohds->ds_dir, csa->unused_refres_delta, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2482 0, 0, tx); |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
ek110237
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5094
diff
changeset
|
2483 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2484 /* swap deadlists */ |
| 5367 | 2485 bplist_close(&csa->cds->ds_deadlist); |
| 2486 bplist_close(&csa->ohds->ds_deadlist); | |
| 2487 SWITCH64(csa->ohds->ds_phys->ds_deadlist_obj, | |
| 2488 csa->cds->ds_phys->ds_deadlist_obj); | |
| 2489 VERIFY(0 == bplist_open(&csa->cds->ds_deadlist, dp->dp_meta_objset, | |
| 2490 csa->cds->ds_phys->ds_deadlist_obj)); | |
| 2491 VERIFY(0 == bplist_open(&csa->ohds->ds_deadlist, dp->dp_meta_objset, | |
| 2492 csa->ohds->ds_phys->ds_deadlist_obj)); | |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2493 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2494 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2495 /* |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2496 * Swap 'clone' with its origin head file system. |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2497 */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2498 int |
| 5367 | 2499 dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, |
| 2500 boolean_t force) | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2501 { |
| 5367 | 2502 struct cloneswaparg csa; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2503 |
| 5367 | 2504 ASSERT(clone->ds_open_refcount == DS_REF_MAX); |
| 2505 ASSERT(origin_head->ds_open_refcount == DS_REF_MAX); | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2506 |
| 5367 | 2507 csa.cds = clone; |
| 2508 csa.ohds = origin_head; | |
| 2509 csa.force = force; | |
| 2510 return (dsl_sync_task_do(clone->ds_dir->dd_pool, | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2511 dsl_dataset_clone_swap_check, |
| 5367 | 2512 dsl_dataset_clone_swap_sync, &csa, NULL, 9)); |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2513 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2514 |
| 3912 | 2515 /* |
| 2516 * Given a pool name and a dataset object number in that pool, | |
| 2517 * return the name of that dataset. | |
| 2518 */ | |
| 2519 int | |
| 2520 dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) | |
| 2521 { | |
| 2522 spa_t *spa; | |
| 2523 dsl_pool_t *dp; | |
| 2524 dsl_dataset_t *ds = NULL; | |
| 2525 int error; | |
| 2526 | |
| 2527 if ((error = spa_open(pname, &spa, FTAG)) != 0) | |
| 2528 return (error); | |
| 2529 dp = spa_get_dsl(spa); | |
| 2530 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 2531 if ((error = dsl_dataset_open_obj(dp, obj, | |
| 2532 NULL, DS_MODE_NONE, FTAG, &ds)) != 0) { | |
| 2533 rw_exit(&dp->dp_config_rwlock); | |
| 2534 spa_close(spa, FTAG); | |
| 2535 return (error); | |
| 2536 } | |
| 2537 dsl_dataset_name(ds, buf); | |
| 2538 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 2539 rw_exit(&dp->dp_config_rwlock); | |
| 2540 spa_close(spa, FTAG); | |
| 2541 | |
| 2542 return (0); | |
| 2543 } | |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2544 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2545 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2546 dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
|
5831
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2547 uint64_t asize, uint64_t inflight, uint64_t *used, |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2548 uint64_t *ref_rsrv) |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2549 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2550 int error = 0; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2551 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2552 ASSERT3S(asize, >, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2553 |
|
5831
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2554 /* |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2555 * *ref_rsrv is the portion of asize that will come from any |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2556 * unconsumed refreservation space. |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2557 */ |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2558 *ref_rsrv = 0; |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2559 |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2560 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2561 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2562 * Make a space adjustment for reserved bytes. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2563 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2564 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2565 ASSERT3U(*used, >=, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2566 ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2567 *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
|
2568 *ref_rsrv = |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
parents:
5712
diff
changeset
|
2569 asize - MIN(asize, parent_delta(ds, asize + inflight)); |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2570 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2571 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2572 if (!check_quota || ds->ds_quota == 0) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2573 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2574 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2575 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2576 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2577 * 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
|
2578 * 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
|
2579 * 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
|
2580 * may free up space for us). |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2581 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2582 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
|
2583 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
|
2584 error = ERESTART; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2585 else |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2586 error = EDQUOT; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2587 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2588 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2589 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2590 return (error); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2591 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2592 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2593 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2594 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2595 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
|
2596 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2597 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2598 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2599 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2600 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2601 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
|
2602 return (ENOTSUP); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2603 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2604 if (new_quota == 0) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2605 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2606 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2607 if (new_quota < ds->ds_phys->ds_used_bytes || |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2608 new_quota < ds->ds_reserved) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2609 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2610 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2611 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2612 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2613 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2614 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2615 void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2616 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
|
2617 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2618 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2619 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2620 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2621 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2622 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2623 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2624 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2625 ds->ds_quota = new_quota; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2626 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2627 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2628 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
|
2629 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2630 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
|
2631 tx, cr, "%lld dataset = %llu ", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2632 (longlong_t)new_quota, ds->ds_dir->dd_phys->dd_head_dataset_obj); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2633 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2634 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2635 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2636 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
|
2637 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2638 dsl_dataset_t *ds; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2639 int err; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2640 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
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diff
changeset
|
2641 err = dsl_dataset_open(dsname, DS_MODE_STANDARD, FTAG, &ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2642 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2643 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2644 |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2645 if (quota != ds->ds_quota) { |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2646 /* |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2647 * 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
|
2648 * want to make sure the file freeing takes effect. |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2649 */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2650 txg_wait_open(ds->ds_dir->dd_pool, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2651 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2652 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2653 dsl_dataset_set_quota_check, dsl_dataset_set_quota_sync, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2654 ds, "a, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2655 } |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2656 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2657 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2658 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2659 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2660 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2661 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
|
2662 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2663 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2664 uint64_t *reservationp = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2665 uint64_t new_reservation = *reservationp; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2666 int64_t delta; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2667 uint64_t unique; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2668 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2669 if (new_reservation > INT64_MAX) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2670 return (EOVERFLOW); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2671 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2672 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
|
2673 SPA_VERSION_REFRESERVATION) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2674 return (ENOTSUP); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2675 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2676 if (dsl_dataset_is_snapshot(ds)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2677 return (EINVAL); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2678 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2679 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2680 * 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
|
2681 * space estimates may be inaccurate. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2682 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2683 if (!dmu_tx_is_syncing(tx)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2684 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2685 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2686 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2687 unique = dsl_dataset_unique(ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2688 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
|
2689 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2690 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2691 if (delta > 0 && |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2692 delta > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2693 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2694 if (delta > 0 && ds->ds_quota > 0 && |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2695 new_reservation > ds->ds_quota) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2696 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2697 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2698 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2699 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2700 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2701 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2702 static void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2703 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
|
2704 dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2705 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2706 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2707 uint64_t *reservationp = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2708 uint64_t new_reservation = *reservationp; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2709 uint64_t unique; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2710 int64_t delta; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2711 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2712 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2713 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2714 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2715 unique = dsl_dataset_unique(ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2716 delta = MAX(0, (int64_t)(new_reservation - unique)) - |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2717 MAX(0, (int64_t)(ds->ds_reserved - unique)); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2718 ds->ds_reserved = new_reservation; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2719 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2720 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2721 dsl_prop_set_uint64_sync(ds->ds_dir, "refreservation", |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2722 new_reservation, cr, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2723 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2724 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
|
2725 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2726 spa_history_internal_log(LOG_DS_REFRESERV, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2727 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
|
2728 (longlong_t)new_reservation, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2729 ds->ds_dir->dd_phys->dd_head_dataset_obj); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2730 } |
|
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 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2733 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
|
2734 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2735 dsl_dataset_t *ds; |
|
111aa1baa84a
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2736 int err; |
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2737 |
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2738 err = dsl_dataset_open(dsname, DS_MODE_STANDARD, FTAG, &ds); |
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2739 if (err) |
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2740 return (err); |
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2741 |
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2742 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
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2743 dsl_dataset_set_reservation_check, |
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2744 dsl_dataset_set_reservation_sync, ds, &reservation, 0); |
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2745 dsl_dataset_close(ds, DS_MODE_STANDARD, FTAG); |
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2746 return (err); |
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2747 } |