Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dsl_dataset.c @ 7385:f69ff8507427
6727817 ZFS assertion failure (zero length arc_buf_alloc) during NFS I/O
6734875 assertion failed: list_head(&osi->os_meta_dnode->dn_dbufs) == 0L
6728399 [f]truncate(2) to non-zero offset broken on ZFS for files < max-blocksize
6730750 pool shows disk space in used but no related files/dirs
6737329 dmu_offset_next() does not find holes
| author | Mark Maybee <Mark.Maybee@Sun.COM> |
|---|---|
| date | Thu, 21 Aug 2008 14:27:33 -0600 |
| parents | 3992f9a413c2 |
| children | 6d408f0a5fbd |
| 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 #include <sys/dmu_objset.h> | |
| 27 #include <sys/dsl_dataset.h> | |
| 28 #include <sys/dsl_dir.h> | |
| 2082 | 29 #include <sys/dsl_prop.h> |
| 2199 | 30 #include <sys/dsl_synctask.h> |
| 789 | 31 #include <sys/dmu_traverse.h> |
| 32 #include <sys/dmu_tx.h> | |
| 33 #include <sys/arc.h> | |
| 34 #include <sys/zio.h> | |
| 35 #include <sys/zap.h> | |
| 36 #include <sys/unique.h> | |
| 37 #include <sys/zfs_context.h> | |
| 4007 | 38 #include <sys/zfs_ioctl.h> |
| 4543 | 39 #include <sys/spa.h> |
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40 #include <sys/zfs_znode.h> |
| 4543 | 41 #include <sys/sunddi.h> |
| 789 | 42 |
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43 static char *dsl_reaper = "the grim reaper"; |
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44 |
| 2199 | 45 static dsl_checkfunc_t dsl_dataset_destroy_begin_check; |
| 46 static dsl_syncfunc_t dsl_dataset_destroy_begin_sync; | |
| 47 static dsl_checkfunc_t dsl_dataset_rollback_check; | |
| 48 static dsl_syncfunc_t dsl_dataset_rollback_sync; | |
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49 static dsl_syncfunc_t dsl_dataset_set_reservation_sync; |
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50 |
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51 #define DS_REF_MAX (1ULL << 62) |
| 789 | 52 |
| 53 #define DSL_DEADLIST_BLOCKSIZE SPA_MAXBLOCKSIZE | |
| 54 | |
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55 #define DSL_DATASET_IS_DESTROYED(ds) ((ds)->ds_owner == dsl_reaper) |
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56 |
| 789 | 57 |
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58 /* |
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59 * Figure out how much of this delta should be propogated to the dsl_dir |
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60 * layer. If there's a refreservation, that space has already been |
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61 * partially accounted for in our ancestors. |
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62 */ |
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63 static int64_t |
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64 parent_delta(dsl_dataset_t *ds, int64_t delta) |
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65 { |
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66 uint64_t old_bytes, new_bytes; |
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67 |
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68 if (ds->ds_reserved == 0) |
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69 return (delta); |
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70 |
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71 old_bytes = MAX(ds->ds_phys->ds_unique_bytes, ds->ds_reserved); |
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72 new_bytes = MAX(ds->ds_phys->ds_unique_bytes + delta, ds->ds_reserved); |
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73 |
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74 ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta)); |
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75 return (new_bytes - old_bytes); |
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76 } |
| 789 | 77 |
| 78 void | |
| 79 dsl_dataset_block_born(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 80 { | |
| 2082 | 81 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
| 789 | 82 int compressed = BP_GET_PSIZE(bp); |
| 83 int uncompressed = BP_GET_UCSIZE(bp); | |
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84 int64_t delta; |
| 789 | 85 |
| 86 dprintf_bp(bp, "born, ds=%p\n", ds); | |
| 87 | |
| 88 ASSERT(dmu_tx_is_syncing(tx)); | |
| 89 /* It could have been compressed away to nothing */ | |
| 90 if (BP_IS_HOLE(bp)) | |
| 91 return; | |
| 92 ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE); | |
| 93 ASSERT3U(BP_GET_TYPE(bp), <, DMU_OT_NUMTYPES); | |
| 94 if (ds == NULL) { | |
| 95 /* | |
| 96 * Account for the meta-objset space in its placeholder | |
| 97 * dsl_dir. | |
| 98 */ | |
| 99 ASSERT3U(compressed, ==, uncompressed); /* it's all metadata */ | |
| 100 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
| 101 used, compressed, uncompressed, tx); | |
| 102 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
| 103 return; | |
| 104 } | |
| 105 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 106 mutex_enter(&ds->ds_lock); | |
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107 delta = parent_delta(ds, used); |
| 789 | 108 ds->ds_phys->ds_used_bytes += used; |
| 109 ds->ds_phys->ds_compressed_bytes += compressed; | |
| 110 ds->ds_phys->ds_uncompressed_bytes += uncompressed; | |
| 111 ds->ds_phys->ds_unique_bytes += used; | |
| 112 mutex_exit(&ds->ds_lock); | |
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113 dsl_dir_diduse_space(ds->ds_dir, delta, compressed, uncompressed, tx); |
| 789 | 114 } |
| 115 | |
| 6992 | 116 int |
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117 dsl_dataset_block_kill(dsl_dataset_t *ds, blkptr_t *bp, zio_t *pio, |
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118 dmu_tx_t *tx) |
| 789 | 119 { |
| 2082 | 120 int used = bp_get_dasize(tx->tx_pool->dp_spa, bp); |
| 789 | 121 int compressed = BP_GET_PSIZE(bp); |
| 122 int uncompressed = BP_GET_UCSIZE(bp); | |
| 123 | |
| 124 ASSERT(dmu_tx_is_syncing(tx)); | |
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125 /* No block pointer => nothing to free */ |
| 789 | 126 if (BP_IS_HOLE(bp)) |
| 6992 | 127 return (0); |
| 789 | 128 |
| 129 ASSERT(used > 0); | |
| 130 if (ds == NULL) { | |
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131 int err; |
| 789 | 132 /* |
| 133 * Account for the meta-objset space in its placeholder | |
| 134 * dataset. | |
| 135 */ | |
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136 err = dsl_free(pio, tx->tx_pool, |
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137 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
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138 ASSERT(err == 0); |
| 789 | 139 |
| 140 dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, | |
| 141 -used, -compressed, -uncompressed, tx); | |
| 142 dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx); | |
| 6992 | 143 return (used); |
| 789 | 144 } |
| 145 ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool); | |
| 146 | |
| 147 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 148 | |
| 149 if (bp->blk_birth > ds->ds_phys->ds_prev_snap_txg) { | |
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150 int err; |
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151 int64_t delta; |
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152 |
| 789 | 153 dprintf_bp(bp, "freeing: %s", ""); |
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154 err = dsl_free(pio, tx->tx_pool, |
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155 tx->tx_txg, bp, NULL, NULL, pio ? ARC_NOWAIT: ARC_WAIT); |
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156 ASSERT(err == 0); |
| 789 | 157 |
| 158 mutex_enter(&ds->ds_lock); | |
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159 ASSERT(ds->ds_phys->ds_unique_bytes >= used || |
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160 !DS_UNIQUE_IS_ACCURATE(ds)); |
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161 delta = parent_delta(ds, -used); |
| 789 | 162 ds->ds_phys->ds_unique_bytes -= used; |
| 163 mutex_exit(&ds->ds_lock); | |
| 164 dsl_dir_diduse_space(ds->ds_dir, | |
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165 delta, -compressed, -uncompressed, tx); |
| 789 | 166 } else { |
| 167 dprintf_bp(bp, "putting on dead list: %s", ""); | |
| 1544 | 168 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, bp, tx)); |
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169 ASSERT3U(ds->ds_prev->ds_object, ==, |
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170 ds->ds_phys->ds_prev_snap_obj); |
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171 ASSERT(ds->ds_prev->ds_phys->ds_num_children > 0); |
| 789 | 172 /* if (bp->blk_birth > prev prev snap txg) prev unique += bs */ |
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173 if (ds->ds_prev->ds_phys->ds_next_snap_obj == |
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174 ds->ds_object && bp->blk_birth > |
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175 ds->ds_prev->ds_phys->ds_prev_snap_txg) { |
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176 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); |
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177 mutex_enter(&ds->ds_prev->ds_lock); |
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178 ds->ds_prev->ds_phys->ds_unique_bytes += used; |
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179 mutex_exit(&ds->ds_prev->ds_lock); |
| 789 | 180 } |
| 181 } | |
| 182 mutex_enter(&ds->ds_lock); | |
| 183 ASSERT3U(ds->ds_phys->ds_used_bytes, >=, used); | |
| 184 ds->ds_phys->ds_used_bytes -= used; | |
| 185 ASSERT3U(ds->ds_phys->ds_compressed_bytes, >=, compressed); | |
| 186 ds->ds_phys->ds_compressed_bytes -= compressed; | |
| 187 ASSERT3U(ds->ds_phys->ds_uncompressed_bytes, >=, uncompressed); | |
| 188 ds->ds_phys->ds_uncompressed_bytes -= uncompressed; | |
| 189 mutex_exit(&ds->ds_lock); | |
| 6992 | 190 |
| 191 return (used); | |
| 789 | 192 } |
| 193 | |
| 1544 | 194 uint64_t |
| 195 dsl_dataset_prev_snap_txg(dsl_dataset_t *ds) | |
| 789 | 196 { |
| 2885 | 197 uint64_t trysnap = 0; |
| 198 | |
| 789 | 199 if (ds == NULL) |
| 1544 | 200 return (0); |
| 789 | 201 /* |
| 202 * The snapshot creation could fail, but that would cause an | |
| 203 * incorrect FALSE return, which would only result in an | |
| 204 * overestimation of the amount of space that an operation would | |
| 205 * consume, which is OK. | |
| 206 * | |
| 207 * There's also a small window where we could miss a pending | |
| 208 * snapshot, because we could set the sync task in the quiescing | |
| 209 * phase. So this should only be used as a guess. | |
| 210 */ | |
| 2885 | 211 if (ds->ds_trysnap_txg > |
| 212 spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa)) | |
| 213 trysnap = ds->ds_trysnap_txg; | |
| 214 return (MAX(ds->ds_phys->ds_prev_snap_txg, trysnap)); | |
| 1544 | 215 } |
| 216 | |
| 217 int | |
| 218 dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth) | |
| 219 { | |
| 220 return (blk_birth > dsl_dataset_prev_snap_txg(ds)); | |
| 789 | 221 } |
| 222 | |
| 223 /* ARGSUSED */ | |
| 224 static void | |
| 225 dsl_dataset_evict(dmu_buf_t *db, void *dsv) | |
| 226 { | |
| 227 dsl_dataset_t *ds = dsv; | |
| 228 | |
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229 ASSERT(ds->ds_owner == NULL || DSL_DATASET_IS_DESTROYED(ds)); |
| 789 | 230 |
| 231 dprintf_ds(ds, "evicting %s\n", ""); | |
| 232 | |
| 4787 | 233 unique_remove(ds->ds_fsid_guid); |
| 789 | 234 |
| 235 if (ds->ds_user_ptr != NULL) | |
| 236 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 237 | |
| 238 if (ds->ds_prev) { | |
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239 dsl_dataset_drop_ref(ds->ds_prev, ds); |
| 789 | 240 ds->ds_prev = NULL; |
| 241 } | |
| 242 | |
| 243 bplist_close(&ds->ds_deadlist); | |
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244 if (ds->ds_dir) |
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245 dsl_dir_close(ds->ds_dir, ds); |
| 789 | 246 |
| 4787 | 247 ASSERT(!list_link_active(&ds->ds_synced_link)); |
| 789 | 248 |
| 2856 | 249 mutex_destroy(&ds->ds_lock); |
| 4787 | 250 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 251 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
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252 rw_destroy(&ds->ds_rwlock); |
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253 cv_destroy(&ds->ds_exclusive_cv); |
| 2856 | 254 |
| 789 | 255 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 256 } | |
| 257 | |
| 1544 | 258 static int |
| 789 | 259 dsl_dataset_get_snapname(dsl_dataset_t *ds) |
| 260 { | |
| 261 dsl_dataset_phys_t *headphys; | |
| 262 int err; | |
| 263 dmu_buf_t *headdbuf; | |
| 264 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 265 objset_t *mos = dp->dp_meta_objset; | |
| 266 | |
| 267 if (ds->ds_snapname[0]) | |
| 1544 | 268 return (0); |
| 789 | 269 if (ds->ds_phys->ds_next_snap_obj == 0) |
| 1544 | 270 return (0); |
| 789 | 271 |
| 1544 | 272 err = dmu_bonus_hold(mos, ds->ds_dir->dd_phys->dd_head_dataset_obj, |
| 273 FTAG, &headdbuf); | |
| 274 if (err) | |
| 275 return (err); | |
| 789 | 276 headphys = headdbuf->db_data; |
| 277 err = zap_value_search(dp->dp_meta_objset, | |
| 4577 | 278 headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname); |
| 1544 | 279 dmu_buf_rele(headdbuf, FTAG); |
| 280 return (err); | |
| 789 | 281 } |
| 282 | |
|
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283 static int |
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284 dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value) |
|
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285 { |
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286 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
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287 uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj; |
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288 matchtype_t mt; |
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289 int err; |
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290 |
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291 if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET) |
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292 mt = MT_FIRST; |
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293 else |
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294 mt = MT_EXACT; |
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295 |
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296 err = zap_lookup_norm(mos, snapobj, name, 8, 1, |
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297 value, mt, NULL, 0, NULL); |
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298 if (err == ENOTSUP && mt == MT_FIRST) |
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299 err = zap_lookup(mos, snapobj, name, 8, 1, value); |
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300 return (err); |
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301 } |
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302 |
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303 static int |
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304 dsl_dataset_snap_remove(dsl_dataset_t *ds, char *name, dmu_tx_t *tx) |
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305 { |
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306 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
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307 uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj; |
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308 matchtype_t mt; |
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309 int err; |
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310 |
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311 if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET) |
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312 mt = MT_FIRST; |
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313 else |
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314 mt = MT_EXACT; |
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315 |
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316 err = zap_remove_norm(mos, snapobj, name, mt, tx); |
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317 if (err == ENOTSUP && mt == MT_FIRST) |
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318 err = zap_remove(mos, snapobj, name, tx); |
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319 return (err); |
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320 } |
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321 |
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322 static int |
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323 dsl_dataset_get_ref(dsl_pool_t *dp, uint64_t dsobj, void *tag, |
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324 dsl_dataset_t **dsp) |
| 789 | 325 { |
| 326 objset_t *mos = dp->dp_meta_objset; | |
| 327 dmu_buf_t *dbuf; | |
| 328 dsl_dataset_t *ds; | |
| 1544 | 329 int err; |
| 789 | 330 |
| 331 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || | |
| 332 dsl_pool_sync_context(dp)); | |
| 333 | |
| 1544 | 334 err = dmu_bonus_hold(mos, dsobj, tag, &dbuf); |
| 335 if (err) | |
| 336 return (err); | |
| 789 | 337 ds = dmu_buf_get_user(dbuf); |
| 338 if (ds == NULL) { | |
| 339 dsl_dataset_t *winner; | |
| 340 | |
| 341 ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP); | |
| 342 ds->ds_dbuf = dbuf; | |
| 343 ds->ds_object = dsobj; | |
| 344 ds->ds_phys = dbuf->db_data; | |
| 345 | |
| 2856 | 346 mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL); |
| 4787 | 347 mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL); |
| 2856 | 348 mutex_init(&ds->ds_deadlist.bpl_lock, NULL, MUTEX_DEFAULT, |
| 349 NULL); | |
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350 rw_init(&ds->ds_rwlock, 0, 0, 0); |
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351 cv_init(&ds->ds_exclusive_cv, NULL, CV_DEFAULT, NULL); |
| 2856 | 352 |
| 1544 | 353 err = bplist_open(&ds->ds_deadlist, |
| 789 | 354 mos, ds->ds_phys->ds_deadlist_obj); |
| 1544 | 355 if (err == 0) { |
| 356 err = dsl_dir_open_obj(dp, | |
| 357 ds->ds_phys->ds_dir_obj, NULL, ds, &ds->ds_dir); | |
| 358 } | |
| 359 if (err) { | |
| 360 /* | |
| 361 * we don't really need to close the blist if we | |
| 362 * just opened it. | |
| 363 */ | |
| 2856 | 364 mutex_destroy(&ds->ds_lock); |
| 4787 | 365 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 366 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
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367 rw_destroy(&ds->ds_rwlock); |
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368 cv_destroy(&ds->ds_exclusive_cv); |
| 1544 | 369 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 370 dmu_buf_rele(dbuf, tag); | |
| 371 return (err); | |
| 372 } | |
| 789 | 373 |
| 374 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == dsobj) { | |
| 375 ds->ds_snapname[0] = '\0'; | |
| 376 if (ds->ds_phys->ds_prev_snap_obj) { | |
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377 err = dsl_dataset_get_ref(dp, |
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378 ds->ds_phys->ds_prev_snap_obj, |
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379 ds, &ds->ds_prev); |
| 789 | 380 } |
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381 } else if (zfs_flags & ZFS_DEBUG_SNAPNAMES) { |
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382 err = dsl_dataset_get_snapname(ds); |
| 789 | 383 } |
| 384 | |
|
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385 if (!dsl_dataset_is_snapshot(ds)) { |
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386 /* |
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387 * In sync context, we're called with either no lock |
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388 * or with the write lock. If we're not syncing, |
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389 * we're always called with the read lock held. |
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390 */ |
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391 boolean_t need_lock = |
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392 !RW_WRITE_HELD(&dp->dp_config_rwlock) && |
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393 dsl_pool_sync_context(dp); |
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394 |
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395 if (need_lock) |
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396 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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397 |
| 7265 | 398 err = dsl_prop_get_ds(ds, |
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399 "refreservation", sizeof (uint64_t), 1, |
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400 &ds->ds_reserved, NULL); |
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401 if (err == 0) { |
| 7265 | 402 err = dsl_prop_get_ds(ds, |
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403 "refquota", sizeof (uint64_t), 1, |
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404 &ds->ds_quota, NULL); |
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405 } |
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406 |
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407 if (need_lock) |
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408 rw_exit(&dp->dp_config_rwlock); |
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409 } else { |
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410 ds->ds_reserved = ds->ds_quota = 0; |
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411 } |
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412 |
| 1544 | 413 if (err == 0) { |
| 414 winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys, | |
| 415 dsl_dataset_evict); | |
| 416 } | |
| 417 if (err || winner) { | |
| 789 | 418 bplist_close(&ds->ds_deadlist); |
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419 if (ds->ds_prev) |
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420 dsl_dataset_drop_ref(ds->ds_prev, ds); |
| 789 | 421 dsl_dir_close(ds->ds_dir, ds); |
| 2856 | 422 mutex_destroy(&ds->ds_lock); |
| 4787 | 423 mutex_destroy(&ds->ds_opening_lock); |
| 2856 | 424 mutex_destroy(&ds->ds_deadlist.bpl_lock); |
|
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425 rw_destroy(&ds->ds_rwlock); |
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426 cv_destroy(&ds->ds_exclusive_cv); |
| 789 | 427 kmem_free(ds, sizeof (dsl_dataset_t)); |
| 1544 | 428 if (err) { |
| 429 dmu_buf_rele(dbuf, tag); | |
| 430 return (err); | |
| 431 } | |
| 789 | 432 ds = winner; |
| 433 } else { | |
| 4787 | 434 ds->ds_fsid_guid = |
| 789 | 435 unique_insert(ds->ds_phys->ds_fsid_guid); |
| 436 } | |
| 437 } | |
| 438 ASSERT3P(ds->ds_dbuf, ==, dbuf); | |
| 439 ASSERT3P(ds->ds_phys, ==, dbuf->db_data); | |
|
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440 ASSERT(ds->ds_phys->ds_prev_snap_obj != 0 || |
|
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441 spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN || |
|
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442 dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap); |
| 789 | 443 mutex_enter(&ds->ds_lock); |
|
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444 if (!dsl_pool_sync_context(dp) && DSL_DATASET_IS_DESTROYED(ds)) { |
| 789 | 445 mutex_exit(&ds->ds_lock); |
|
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446 dmu_buf_rele(ds->ds_dbuf, tag); |
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447 return (ENOENT); |
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448 } |
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449 mutex_exit(&ds->ds_lock); |
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450 *dsp = ds; |
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451 return (0); |
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452 } |
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453 |
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454 static int |
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455 dsl_dataset_hold_ref(dsl_dataset_t *ds, void *tag) |
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456 { |
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457 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
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458 |
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459 /* |
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460 * In syncing context we don't want the rwlock lock: there |
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461 * may be an existing writer waiting for sync phase to |
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462 * finish. We don't need to worry about such writers, since |
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463 * sync phase is single-threaded, so the writer can't be |
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464 * doing anything while we are active. |
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465 */ |
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466 if (dsl_pool_sync_context(dp)) { |
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467 ASSERT(!DSL_DATASET_IS_DESTROYED(ds)); |
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468 return (0); |
| 789 | 469 } |
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470 |
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471 /* |
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472 * Normal users will hold the ds_rwlock as a READER until they |
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473 * are finished (i.e., call dsl_dataset_rele()). "Owners" will |
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474 * drop their READER lock after they set the ds_owner field. |
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475 * |
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476 * If the dataset is being destroyed, the destroy thread will |
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477 * obtain a WRITER lock for exclusive access after it's done its |
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478 * open-context work and then change the ds_owner to |
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479 * dsl_reaper once destruction is assured. So threads |
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480 * may block here temporarily, until the "destructability" of |
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481 * the dataset is determined. |
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482 */ |
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483 ASSERT(!RW_WRITE_HELD(&dp->dp_config_rwlock)); |
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484 mutex_enter(&ds->ds_lock); |
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485 while (!rw_tryenter(&ds->ds_rwlock, RW_READER)) { |
|
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486 rw_exit(&dp->dp_config_rwlock); |
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487 cv_wait(&ds->ds_exclusive_cv, &ds->ds_lock); |
|
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488 if (DSL_DATASET_IS_DESTROYED(ds)) { |
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489 mutex_exit(&ds->ds_lock); |
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490 dsl_dataset_drop_ref(ds, tag); |
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491 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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492 return (ENOENT); |
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493 } |
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494 rw_enter(&dp->dp_config_rwlock, RW_READER); |
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495 } |
| 789 | 496 mutex_exit(&ds->ds_lock); |
| 1544 | 497 return (0); |
| 789 | 498 } |
| 499 | |
| 500 int | |
|
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501 dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, |
|
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502 dsl_dataset_t **dsp) |
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503 { |
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504 int err = dsl_dataset_get_ref(dp, dsobj, tag, dsp); |
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|
505 |
|
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|
506 if (err) |
|
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|
507 return (err); |
|
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508 return (dsl_dataset_hold_ref(*dsp, tag)); |
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509 } |
|
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|
510 |
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|
511 int |
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512 dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, int flags, void *owner, |
|
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513 dsl_dataset_t **dsp) |
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514 { |
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515 int err = dsl_dataset_hold_obj(dp, dsobj, owner, dsp); |
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516 |
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517 ASSERT(DS_MODE_TYPE(flags) != DS_MODE_USER); |
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518 |
|
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|
519 if (err) |
|
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|
520 return (err); |
|
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|
521 if (!dsl_dataset_tryown(*dsp, DS_MODE_IS_INCONSISTENT(flags), owner)) { |
|
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|
522 dsl_dataset_rele(*dsp, owner); |
|
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|
523 return (EBUSY); |
|
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|
524 } |
|
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|
525 return (0); |
|
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|
526 } |
|
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|
527 |
|
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|
528 int |
|
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|
529 dsl_dataset_hold(const char *name, void *tag, dsl_dataset_t **dsp) |
| 789 | 530 { |
| 531 dsl_dir_t *dd; | |
| 532 dsl_pool_t *dp; | |
|
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|
533 const char *snapname; |
| 789 | 534 uint64_t obj; |
| 535 int err = 0; | |
| 536 | |
|
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|
537 err = dsl_dir_open_spa(NULL, name, FTAG, &dd, &snapname); |
| 1544 | 538 if (err) |
| 539 return (err); | |
| 789 | 540 |
| 541 dp = dd->dd_pool; | |
| 542 obj = dd->dd_phys->dd_head_dataset_obj; | |
| 543 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
|
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|
544 if (obj) |
|
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|
545 err = dsl_dataset_get_ref(dp, obj, tag, dsp); |
|
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|
546 else |
| 789 | 547 err = ENOENT; |
|
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|
548 if (err) |
| 789 | 549 goto out; |
|
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|
550 |
|
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|
551 err = dsl_dataset_hold_ref(*dsp, tag); |
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|
552 |
|
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|
553 /* we may be looking for a snapshot */ |
|
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|
554 if (err == 0 && snapname != NULL) { |
|
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|
555 dsl_dataset_t *ds = NULL; |
|
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|
556 |
|
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|
557 if (*snapname++ != '@') { |
|
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|
558 dsl_dataset_rele(*dsp, tag); |
| 789 | 559 err = ENOENT; |
| 560 goto out; | |
| 561 } | |
|
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|
562 |
|
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|
563 dprintf("looking for snapshot '%s'\n", snapname); |
|
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|
564 err = dsl_dataset_snap_lookup(*dsp, snapname, &obj); |
|
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|
565 if (err == 0) |
|
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|
566 err = dsl_dataset_get_ref(dp, obj, tag, &ds); |
|
47572a2f5e73
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|
567 dsl_dataset_rele(*dsp, tag); |
|
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|
568 |
|
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|
569 ASSERT3U((err == 0), ==, (ds != NULL)); |
|
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|
570 |
|
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|
571 if (ds) { |
|
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diff
changeset
|
572 mutex_enter(&ds->ds_lock); |
|
47572a2f5e73
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|
573 if (ds->ds_snapname[0] == 0) |
|
47572a2f5e73
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changeset
|
574 (void) strlcpy(ds->ds_snapname, snapname, |
|
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diff
changeset
|
575 sizeof (ds->ds_snapname)); |
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576 mutex_exit(&ds->ds_lock); |
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577 err = dsl_dataset_hold_ref(ds, tag); |
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578 *dsp = err ? NULL : ds; |
| 789 | 579 } |
| 580 } | |
| 581 out: | |
| 582 rw_exit(&dp->dp_config_rwlock); | |
| 583 dsl_dir_close(dd, FTAG); | |
| 584 return (err); | |
| 585 } | |
| 586 | |
| 587 int | |
|
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588 dsl_dataset_own(const char *name, int flags, void *owner, dsl_dataset_t **dsp) |
| 789 | 589 { |
|
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590 int err = dsl_dataset_hold(name, owner, dsp); |
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591 if (err) |
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592 return (err); |
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593 if ((*dsp)->ds_phys->ds_num_children > 0 && |
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594 !DS_MODE_IS_READONLY(flags)) { |
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595 dsl_dataset_rele(*dsp, owner); |
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596 return (EROFS); |
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597 } |
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598 if (!dsl_dataset_tryown(*dsp, DS_MODE_IS_INCONSISTENT(flags), owner)) { |
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599 dsl_dataset_rele(*dsp, owner); |
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600 return (EBUSY); |
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601 } |
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602 return (0); |
| 789 | 603 } |
| 604 | |
| 605 void | |
| 606 dsl_dataset_name(dsl_dataset_t *ds, char *name) | |
| 607 { | |
| 608 if (ds == NULL) { | |
| 609 (void) strcpy(name, "mos"); | |
| 610 } else { | |
| 611 dsl_dir_name(ds->ds_dir, name); | |
| 1544 | 612 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 613 if (ds->ds_snapname[0]) { |
| 614 (void) strcat(name, "@"); | |
|
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615 /* |
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616 * We use a "recursive" mutex so that we |
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617 * can call dprintf_ds() with ds_lock held. |
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618 */ |
| 789 | 619 if (!MUTEX_HELD(&ds->ds_lock)) { |
| 620 mutex_enter(&ds->ds_lock); | |
| 621 (void) strcat(name, ds->ds_snapname); | |
| 622 mutex_exit(&ds->ds_lock); | |
| 623 } else { | |
| 624 (void) strcat(name, ds->ds_snapname); | |
| 625 } | |
| 626 } | |
| 627 } | |
| 628 } | |
| 629 | |
|
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630 static int |
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631 dsl_dataset_namelen(dsl_dataset_t *ds) |
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632 { |
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633 int result; |
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634 |
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635 if (ds == NULL) { |
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636 result = 3; /* "mos" */ |
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637 } else { |
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638 result = dsl_dir_namelen(ds->ds_dir); |
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639 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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640 if (ds->ds_snapname[0]) { |
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641 ++result; /* adding one for the @-sign */ |
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642 if (!MUTEX_HELD(&ds->ds_lock)) { |
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643 mutex_enter(&ds->ds_lock); |
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644 result += strlen(ds->ds_snapname); |
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645 mutex_exit(&ds->ds_lock); |
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646 } else { |
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647 result += strlen(ds->ds_snapname); |
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648 } |
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649 } |
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650 } |
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651 |
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652 return (result); |
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653 } |
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654 |
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655 void |
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656 dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag) |
| 789 | 657 { |
| 1544 | 658 dmu_buf_rele(ds->ds_dbuf, tag); |
| 789 | 659 } |
| 660 | |
| 661 void | |
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662 dsl_dataset_rele(dsl_dataset_t *ds, void *tag) |
| 5367 | 663 { |
|
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664 if (!dsl_pool_sync_context(ds->ds_dir->dd_pool)) { |
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665 rw_exit(&ds->ds_rwlock); |
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666 } |
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667 dsl_dataset_drop_ref(ds, tag); |
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668 } |
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669 |
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670 void |
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671 dsl_dataset_disown(dsl_dataset_t *ds, void *owner) |
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672 { |
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673 ASSERT((ds->ds_owner == owner && ds->ds_dbuf) || |
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674 (DSL_DATASET_IS_DESTROYED(ds) && ds->ds_dbuf == NULL)); |
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675 |
| 5367 | 676 mutex_enter(&ds->ds_lock); |
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677 ds->ds_owner = NULL; |
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678 if (RW_WRITE_HELD(&ds->ds_rwlock)) { |
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679 rw_exit(&ds->ds_rwlock); |
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680 cv_broadcast(&ds->ds_exclusive_cv); |
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681 } |
| 5367 | 682 mutex_exit(&ds->ds_lock); |
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683 if (ds->ds_dbuf) |
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684 dsl_dataset_drop_ref(ds, owner); |
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685 else |
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686 dsl_dataset_evict(ds->ds_dbuf, ds); |
| 5367 | 687 } |
| 688 | |
| 689 boolean_t | |
|
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690 dsl_dataset_tryown(dsl_dataset_t *ds, boolean_t inconsistentok, void *owner) |
| 5367 | 691 { |
|
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692 boolean_t gotit = FALSE; |
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693 |
| 5367 | 694 mutex_enter(&ds->ds_lock); |
|
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695 if (ds->ds_owner == NULL && |
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696 (!DS_IS_INCONSISTENT(ds) || inconsistentok)) { |
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697 ds->ds_owner = owner; |
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698 if (!dsl_pool_sync_context(ds->ds_dir->dd_pool)) |
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699 rw_exit(&ds->ds_rwlock); |
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700 gotit = TRUE; |
| 5367 | 701 } |
| 702 mutex_exit(&ds->ds_lock); | |
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703 return (gotit); |
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704 } |
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705 |
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706 void |
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707 dsl_dataset_make_exclusive(dsl_dataset_t *ds, void *owner) |
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708 { |
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709 ASSERT3P(owner, ==, ds->ds_owner); |
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710 if (!RW_WRITE_HELD(&ds->ds_rwlock)) |
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711 rw_enter(&ds->ds_rwlock, RW_WRITER); |
| 5367 | 712 } |
| 713 | |
| 2199 | 714 uint64_t |
|
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715 dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, |
|
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716 uint64_t flags, dmu_tx_t *tx) |
| 789 | 717 { |
| 5367 | 718 dsl_pool_t *dp = dd->dd_pool; |
| 789 | 719 dmu_buf_t *dbuf; |
| 720 dsl_dataset_phys_t *dsphys; | |
| 5367 | 721 uint64_t dsobj; |
| 789 | 722 objset_t *mos = dp->dp_meta_objset; |
| 723 | |
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724 if (origin == NULL) |
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725 origin = dp->dp_origin_snap; |
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726 |
| 5367 | 727 ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp); |
| 728 ASSERT(origin == NULL || origin->ds_phys->ds_num_children > 0); | |
| 789 | 729 ASSERT(dmu_tx_is_syncing(tx)); |
| 5367 | 730 ASSERT(dd->dd_phys->dd_head_dataset_obj == 0); |
| 789 | 731 |
|
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732 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
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|
733 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 734 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 735 dmu_buf_will_dirty(dbuf, tx); |
| 736 dsphys = dbuf->db_data; | |
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737 bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
| 789 | 738 dsphys->ds_dir_obj = dd->dd_object; |
|
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739 dsphys->ds_flags = flags; |
| 789 | 740 dsphys->ds_fsid_guid = unique_create(); |
| 741 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 742 sizeof (dsphys->ds_guid)); | |
| 743 dsphys->ds_snapnames_zapobj = | |
|
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744 zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP, |
|
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|
745 DMU_OT_NONE, 0, tx); |
| 789 | 746 dsphys->ds_creation_time = gethrestime_sec(); |
|
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diff
changeset
|
747 dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg; |
| 789 | 748 dsphys->ds_deadlist_obj = |
| 749 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
750 |
| 5367 | 751 if (origin) { |
| 752 dsphys->ds_prev_snap_obj = origin->ds_object; | |
| 789 | 753 dsphys->ds_prev_snap_txg = |
| 5367 | 754 origin->ds_phys->ds_creation_txg; |
| 789 | 755 dsphys->ds_used_bytes = |
| 5367 | 756 origin->ds_phys->ds_used_bytes; |
| 789 | 757 dsphys->ds_compressed_bytes = |
| 5367 | 758 origin->ds_phys->ds_compressed_bytes; |
| 789 | 759 dsphys->ds_uncompressed_bytes = |
| 5367 | 760 origin->ds_phys->ds_uncompressed_bytes; |
| 761 dsphys->ds_bp = origin->ds_phys->ds_bp; | |
|
6502
66aef5f20377
6694731 drc->drc_real_ds->ds_phys->ds_flags & (1ULL<<0), file: ../../common/fs/zfs/dmu_send.c, line: 1069
timh
parents:
6492
diff
changeset
|
762 dsphys->ds_flags |= origin->ds_phys->ds_flags; |
| 789 | 763 |
| 5367 | 764 dmu_buf_will_dirty(origin->ds_dbuf, tx); |
| 765 origin->ds_phys->ds_num_children++; | |
| 789 | 766 |
|
7046
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
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parents:
6992
diff
changeset
|
767 if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) { |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
768 if (origin->ds_phys->ds_next_clones_obj == 0) { |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
769 origin->ds_phys->ds_next_clones_obj = |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
770 zap_create(mos, |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
771 DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx); |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
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diff
changeset
|
772 } |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
773 VERIFY(0 == zap_add_int(mos, |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
774 origin->ds_phys->ds_next_clones_obj, |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
775 dsobj, tx)); |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
776 } |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
777 |
| 789 | 778 dmu_buf_will_dirty(dd->dd_dbuf, tx); |
| 5367 | 779 dd->dd_phys->dd_origin_obj = origin->ds_object; |
| 789 | 780 } |
|
6492
903545192033
6654808 FIGNORECASE lookups in a zfs xattr dir don't provide 'realname' data
timh
parents:
6047
diff
changeset
|
781 |
|
903545192033
6654808 FIGNORECASE lookups in a zfs xattr dir don't provide 'realname' data
timh
parents:
6047
diff
changeset
|
782 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
|
903545192033
6654808 FIGNORECASE lookups in a zfs xattr dir don't provide 'realname' data
timh
parents:
6047
diff
changeset
|
783 dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
|
903545192033
6654808 FIGNORECASE lookups in a zfs xattr dir don't provide 'realname' data
timh
parents:
6047
diff
changeset
|
784 |
| 1544 | 785 dmu_buf_rele(dbuf, FTAG); |
| 789 | 786 |
| 787 dmu_buf_will_dirty(dd->dd_dbuf, tx); | |
| 788 dd->dd_phys->dd_head_dataset_obj = dsobj; | |
| 5367 | 789 |
| 790 return (dsobj); | |
| 791 } | |
| 792 | |
| 793 uint64_t | |
|
6492
903545192033
6654808 FIGNORECASE lookups in a zfs xattr dir don't provide 'realname' data
timh
parents:
6047
diff
changeset
|
794 dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname, |
|
903545192033
6654808 FIGNORECASE lookups in a zfs xattr dir don't provide 'realname' data
timh
parents:
6047
diff
changeset
|
795 dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx) |
| 5367 | 796 { |
| 797 dsl_pool_t *dp = pdd->dd_pool; | |
| 798 uint64_t dsobj, ddobj; | |
| 799 dsl_dir_t *dd; | |
| 800 | |
| 801 ASSERT(lastname[0] != '@'); | |
| 802 | |
|
7046
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
803 ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx); |
| 5367 | 804 VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd)); |
| 805 | |
|
7046
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
806 dsobj = dsl_dataset_create_sync_dd(dd, origin, flags, tx); |
| 5367 | 807 |
| 808 dsl_deleg_set_create_perms(dd, tx, cr); | |
| 809 | |
| 789 | 810 dsl_dir_close(dd, FTAG); |
| 811 | |
| 2199 | 812 return (dsobj); |
| 813 } | |
| 814 | |
| 815 struct destroyarg { | |
| 816 dsl_sync_task_group_t *dstg; | |
| 817 char *snapname; | |
| 818 char *failed; | |
| 819 }; | |
| 820 | |
| 821 static int | |
| 822 dsl_snapshot_destroy_one(char *name, void *arg) | |
| 823 { | |
| 824 struct destroyarg *da = arg; | |
| 825 dsl_dataset_t *ds; | |
| 826 char *cp; | |
| 827 int err; | |
| 828 | |
| 829 (void) strcat(name, "@"); | |
| 830 (void) strcat(name, da->snapname); | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
831 err = dsl_dataset_own(name, DS_MODE_READONLY | DS_MODE_INCONSISTENT, |
| 4007 | 832 da->dstg, &ds); |
| 2199 | 833 cp = strchr(name, '@'); |
| 834 *cp = '\0'; | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
835 if (err == 0) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
836 dsl_dataset_make_exclusive(ds, da->dstg); |
|
7237
f47d41541b14
PSARC 2008/393 zfs primarycache and secondarycache properties
ek110237
parents:
7077
diff
changeset
|
837 if (ds->ds_user_ptr) { |
|
f47d41541b14
PSARC 2008/393 zfs primarycache and secondarycache properties
ek110237
parents:
7077
diff
changeset
|
838 ds->ds_user_evict_func(ds, ds->ds_user_ptr); |
|
f47d41541b14
PSARC 2008/393 zfs primarycache and secondarycache properties
ek110237
parents:
7077
diff
changeset
|
839 ds->ds_user_ptr = NULL; |
|
f47d41541b14
PSARC 2008/393 zfs primarycache and secondarycache properties
ek110237
parents:
7077
diff
changeset
|
840 } |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
841 dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check, |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
842 dsl_dataset_destroy_sync, ds, da->dstg, 0); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
843 } else if (err == ENOENT) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
844 err = 0; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
845 } else { |
| 2199 | 846 (void) strcpy(da->failed, name); |
| 847 } | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
848 return (err); |
| 789 | 849 } |
| 850 | |
| 2199 | 851 /* |
| 852 * Destroy 'snapname' in all descendants of 'fsname'. | |
| 853 */ | |
| 854 #pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy | |
| 855 int | |
| 856 dsl_snapshots_destroy(char *fsname, char *snapname) | |
| 857 { | |
| 858 int err; | |
| 859 struct destroyarg da; | |
| 860 dsl_sync_task_t *dst; | |
| 861 spa_t *spa; | |
| 862 | |
|
4603
c7840c367d00
6494569 zfs recv -d pool/<doesn't exist> core dumps for top-level filesystem backups
ahrens
parents:
4577
diff
changeset
|
863 err = spa_open(fsname, &spa, FTAG); |
| 2199 | 864 if (err) |
| 865 return (err); | |
| 866 da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); | |
| 867 da.snapname = snapname; | |
| 868 da.failed = fsname; | |
| 869 | |
| 870 err = dmu_objset_find(fsname, | |
| 2417 | 871 dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN); |
| 2199 | 872 |
| 873 if (err == 0) | |
| 874 err = dsl_sync_task_group_wait(da.dstg); | |
| 875 | |
| 876 for (dst = list_head(&da.dstg->dstg_tasks); dst; | |
| 877 dst = list_next(&da.dstg->dstg_tasks, dst)) { | |
| 878 dsl_dataset_t *ds = dst->dst_arg1; | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
879 /* |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
880 * Return the file system name that triggered the error |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
881 */ |
| 2199 | 882 if (dst->dst_err) { |
| 883 dsl_dataset_name(ds, fsname); | |
|
4603
c7840c367d00
6494569 zfs recv -d pool/<doesn't exist> core dumps for top-level filesystem backups
ahrens
parents:
4577
diff
changeset
|
884 *strchr(fsname, '@') = '\0'; |
| 2199 | 885 } |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
886 dsl_dataset_disown(ds, da.dstg); |
| 2199 | 887 } |
| 888 | |
| 889 dsl_sync_task_group_destroy(da.dstg); | |
| 890 spa_close(spa, FTAG); | |
| 891 return (err); | |
| 892 } | |
| 893 | |
| 5367 | 894 /* |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
895 * ds must be opened as OWNER. On return (whether successful or not), |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
896 * ds will be closed and caller can no longer dereference it. |
| 5367 | 897 */ |
| 789 | 898 int |
| 5367 | 899 dsl_dataset_destroy(dsl_dataset_t *ds, void *tag) |
| 789 | 900 { |
| 901 int err; | |
| 2199 | 902 dsl_sync_task_group_t *dstg; |
| 903 objset_t *os; | |
| 789 | 904 dsl_dir_t *dd; |
| 2199 | 905 uint64_t obj; |
| 906 | |
| 5367 | 907 if (dsl_dataset_is_snapshot(ds)) { |
| 2199 | 908 /* Destroying a snapshot is simpler */ |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
909 dsl_dataset_make_exclusive(ds, tag); |
|
7237
f47d41541b14
PSARC 2008/393 zfs primarycache and secondarycache properties
ek110237
parents:
7077
diff
changeset
|
910 |
|
f47d41541b14
PSARC 2008/393 zfs primarycache and secondarycache properties
ek110237
parents:
7077
diff
changeset
|
911 if (ds->ds_user_ptr) { |
|
f47d41541b14
PSARC 2008/393 zfs primarycache and secondarycache properties
ek110237
parents:
7077
diff
changeset
|
912 ds->ds_user_evict_func(ds, ds->ds_user_ptr); |
|
f47d41541b14
PSARC 2008/393 zfs primarycache and secondarycache properties
ek110237
parents:
7077
diff
changeset
|
913 ds->ds_user_ptr = NULL; |
|
f47d41541b14
PSARC 2008/393 zfs primarycache and secondarycache properties
ek110237
parents:
7077
diff
changeset
|
914 } |
| 2199 | 915 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 916 dsl_dataset_destroy_check, dsl_dataset_destroy_sync, | |
| 5367 | 917 ds, tag, 0); |
| 918 goto out; | |
| 2199 | 919 } |
| 920 | |
| 921 dd = ds->ds_dir; | |
| 789 | 922 |
| 2199 | 923 /* |
| 924 * Check for errors and mark this ds as inconsistent, in | |
| 925 * case we crash while freeing the objects. | |
| 926 */ | |
| 927 err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check, | |
| 928 dsl_dataset_destroy_begin_sync, ds, NULL, 0); | |
| 5367 | 929 if (err) |
| 930 goto out; | |
| 931 | |
| 932 err = dmu_objset_open_ds(ds, DMU_OST_ANY, &os); | |
| 933 if (err) | |
| 934 goto out; | |
| 2199 | 935 |
| 936 /* | |
| 937 * remove the objects in open context, so that we won't | |
| 938 * have too much to do in syncing context. | |
| 939 */ | |
|
3025
4e5ee8301d84
6424466 "panic: data after EOF" when unmounting abused pool
ahrens
parents:
2885
diff
changeset
|
940 for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, |
|
4e5ee8301d84
6424466 "panic: data after EOF" when unmounting abused pool
ahrens
parents:
2885
diff
changeset
|
941 ds->ds_phys->ds_prev_snap_txg)) { |
| 6992 | 942 /* |
| 943 * Ignore errors, if there is not enough disk space | |
| 944 * we will deal with it in dsl_dataset_destroy_sync(). | |
| 945 */ | |
| 946 (void) dmu_free_object(os, obj); | |
| 2199 | 947 } |
| 948 | |
| 949 dmu_objset_close(os); | |
| 950 if (err != ESRCH) | |
| 5367 | 951 goto out; |
| 2199 | 952 |
|
6975
c511f317869e
6717522 panic in dmu_objset_stats() due to freed objset_impl_t
maybee
parents:
6689
diff
changeset
|
953 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); |
|
c511f317869e
6717522 panic in dmu_objset_stats() due to freed objset_impl_t
maybee
parents:
6689
diff
changeset
|
954 err = dsl_dir_open_obj(dd->dd_pool, dd->dd_object, NULL, FTAG, &dd); |
|
c511f317869e
6717522 panic in dmu_objset_stats() due to freed objset_impl_t
maybee
parents:
6689
diff
changeset
|
955 rw_exit(&dd->dd_pool->dp_config_rwlock); |
|
c511f317869e
6717522 panic in dmu_objset_stats() due to freed objset_impl_t
maybee
parents:
6689
diff
changeset
|
956 |
|
c511f317869e
6717522 panic in dmu_objset_stats() due to freed objset_impl_t
maybee
parents:
6689
diff
changeset
|
957 if (err) |
|
c511f317869e
6717522 panic in dmu_objset_stats() due to freed objset_impl_t
maybee
parents:
6689
diff
changeset
|
958 goto out; |
|
c511f317869e
6717522 panic in dmu_objset_stats() due to freed objset_impl_t
maybee
parents:
6689
diff
changeset
|
959 |
| 5367 | 960 if (ds->ds_user_ptr) { |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
961 /* |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
962 * We need to sync out all in-flight IO before we try |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
963 * to evict (the dataset evict func is trying to clear |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
964 * the cached entries for this dataset in the ARC). |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
965 */ |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
966 txg_wait_synced(dd->dd_pool, 0); |
| 5367 | 967 } |
| 968 | |
| 2199 | 969 /* |
| 970 * Blow away the dsl_dir + head dataset. | |
| 971 */ | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
972 dsl_dataset_make_exclusive(ds, tag); |
|
6975
c511f317869e
6717522 panic in dmu_objset_stats() due to freed objset_impl_t
maybee
parents:
6689
diff
changeset
|
973 if (ds->ds_user_ptr) { |
|
c511f317869e
6717522 panic in dmu_objset_stats() due to freed objset_impl_t
maybee
parents:
6689
diff
changeset
|
974 ds->ds_user_evict_func(ds, ds->ds_user_ptr); |
|
c511f317869e
6717522 panic in dmu_objset_stats() due to freed objset_impl_t
maybee
parents:
6689
diff
changeset
|
975 ds->ds_user_ptr = NULL; |
|
c511f317869e
6717522 panic in dmu_objset_stats() due to freed objset_impl_t
maybee
parents:
6689
diff
changeset
|
976 } |
| 2199 | 977 dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool); |
| 978 dsl_sync_task_create(dstg, dsl_dataset_destroy_check, | |
| 5367 | 979 dsl_dataset_destroy_sync, ds, tag, 0); |
| 2199 | 980 dsl_sync_task_create(dstg, dsl_dir_destroy_check, |
| 981 dsl_dir_destroy_sync, dd, FTAG, 0); | |
| 982 err = dsl_sync_task_group_wait(dstg); | |
| 983 dsl_sync_task_group_destroy(dstg); | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
984 /* if it is successful, dsl_dir_destroy_sync will close the dd */ |
| 5367 | 985 if (err) |
| 2199 | 986 dsl_dir_close(dd, FTAG); |
| 5367 | 987 out: |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
988 dsl_dataset_disown(ds, tag); |
| 789 | 989 return (err); |
| 990 } | |
| 991 | |
| 992 int | |
| 5367 | 993 dsl_dataset_rollback(dsl_dataset_t *ds, dmu_objset_type_t ost) |
| 789 | 994 { |
|
7385
f69ff8507427
6727817 ZFS assertion failure (zero length arc_buf_alloc) during NFS I/O
Mark Maybee <Mark.Maybee@Sun.COM>
parents:
7312
diff
changeset
|
995 int err; |
|
f69ff8507427
6727817 ZFS assertion failure (zero length arc_buf_alloc) during NFS I/O
Mark Maybee <Mark.Maybee@Sun.COM>
parents:
7312
diff
changeset
|
996 |
|
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997 ASSERT(ds->ds_owner); |
| 5367 | 998 |
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999 dsl_dataset_make_exclusive(ds, ds->ds_owner); |
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1000 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2199 | 1001 dsl_dataset_rollback_check, dsl_dataset_rollback_sync, |
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1002 ds, &ost, 0); |
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1003 /* drop exclusive access */ |
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1004 mutex_enter(&ds->ds_lock); |
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1005 rw_exit(&ds->ds_rwlock); |
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1006 cv_broadcast(&ds->ds_exclusive_cv); |
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1007 mutex_exit(&ds->ds_lock); |
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1008 return (err); |
| 789 | 1009 } |
| 1010 | |
| 1011 void * | |
| 1012 dsl_dataset_set_user_ptr(dsl_dataset_t *ds, | |
| 1013 void *p, dsl_dataset_evict_func_t func) | |
| 1014 { | |
| 1015 void *old; | |
| 1016 | |
| 1017 mutex_enter(&ds->ds_lock); | |
| 1018 old = ds->ds_user_ptr; | |
| 1019 if (old == NULL) { | |
| 1020 ds->ds_user_ptr = p; | |
| 1021 ds->ds_user_evict_func = func; | |
| 1022 } | |
| 1023 mutex_exit(&ds->ds_lock); | |
| 1024 return (old); | |
| 1025 } | |
| 1026 | |
| 1027 void * | |
| 1028 dsl_dataset_get_user_ptr(dsl_dataset_t *ds) | |
| 1029 { | |
| 1030 return (ds->ds_user_ptr); | |
| 1031 } | |
| 1032 | |
| 1033 | |
|
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1034 blkptr_t * |
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1035 dsl_dataset_get_blkptr(dsl_dataset_t *ds) |
| 789 | 1036 { |
|
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1037 return (&ds->ds_phys->ds_bp); |
| 789 | 1038 } |
| 1039 | |
| 1040 void | |
| 1041 dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx) | |
| 1042 { | |
| 1043 ASSERT(dmu_tx_is_syncing(tx)); | |
| 1044 /* If it's the meta-objset, set dp_meta_rootbp */ | |
| 1045 if (ds == NULL) { | |
| 1046 tx->tx_pool->dp_meta_rootbp = *bp; | |
| 1047 } else { | |
| 1048 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1049 ds->ds_phys->ds_bp = *bp; | |
| 1050 } | |
| 1051 } | |
| 1052 | |
| 1053 spa_t * | |
| 1054 dsl_dataset_get_spa(dsl_dataset_t *ds) | |
| 1055 { | |
| 1056 return (ds->ds_dir->dd_pool->dp_spa); | |
| 1057 } | |
| 1058 | |
| 1059 void | |
| 1060 dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx) | |
| 1061 { | |
| 1062 dsl_pool_t *dp; | |
| 1063 | |
| 1064 if (ds == NULL) /* this is the meta-objset */ | |
| 1065 return; | |
| 1066 | |
| 1067 ASSERT(ds->ds_user_ptr != NULL); | |
| 2885 | 1068 |
| 1069 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 1070 panic("dirtying snapshot!"); | |
| 789 | 1071 |
| 1072 dp = ds->ds_dir->dd_pool; | |
| 1073 | |
| 1074 if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) { | |
| 1075 /* up the hold count until we can be written out */ | |
| 1076 dmu_buf_add_ref(ds->ds_dbuf, ds); | |
| 1077 } | |
| 1078 } | |
| 1079 | |
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1080 /* |
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1081 * The unique space in the head dataset can be calculated by subtracting |
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1082 * the space used in the most recent snapshot, that is still being used |
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1083 * in this file system, from the space currently in use. To figure out |
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1084 * the space in the most recent snapshot still in use, we need to take |
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1085 * the total space used in the snapshot and subtract out the space that |
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1086 * has been freed up since the snapshot was taken. |
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1087 */ |
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1088 static void |
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1089 dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds) |
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1090 { |
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1091 uint64_t mrs_used; |
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1092 uint64_t dlused, dlcomp, dluncomp; |
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1093 |
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1094 ASSERT(ds->ds_object == ds->ds_dir->dd_phys->dd_head_dataset_obj); |
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1095 |
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1096 if (ds->ds_phys->ds_prev_snap_obj != 0) |
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1097 mrs_used = ds->ds_prev->ds_phys->ds_used_bytes; |
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1098 else |
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1099 mrs_used = 0; |
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1100 |
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1101 VERIFY(0 == bplist_space(&ds->ds_deadlist, &dlused, &dlcomp, |
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1102 &dluncomp)); |
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1103 |
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1104 ASSERT3U(dlused, <=, mrs_used); |
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1105 ds->ds_phys->ds_unique_bytes = |
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1106 ds->ds_phys->ds_used_bytes - (mrs_used - dlused); |
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1107 |
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1108 if (!DS_UNIQUE_IS_ACCURATE(ds) && |
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1109 spa_version(ds->ds_dir->dd_pool->dp_spa) >= |
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1110 SPA_VERSION_UNIQUE_ACCURATE) |
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1111 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
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1112 } |
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1113 |
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1114 static uint64_t |
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1115 dsl_dataset_unique(dsl_dataset_t *ds) |
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1116 { |
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1117 if (!DS_UNIQUE_IS_ACCURATE(ds) && !dsl_dataset_is_snapshot(ds)) |
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1118 dsl_dataset_recalc_head_uniq(ds); |
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1119 |
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1120 return (ds->ds_phys->ds_unique_bytes); |
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1121 } |
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1122 |
| 789 | 1123 struct killarg { |
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1124 int64_t *usedp; |
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1125 int64_t *compressedp; |
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1126 int64_t *uncompressedp; |
| 789 | 1127 zio_t *zio; |
| 1128 dmu_tx_t *tx; | |
| 1129 }; | |
| 1130 | |
| 1131 static int | |
| 1132 kill_blkptr(traverse_blk_cache_t *bc, spa_t *spa, void *arg) | |
| 1133 { | |
| 1134 struct killarg *ka = arg; | |
| 1135 blkptr_t *bp = &bc->bc_blkptr; | |
| 1136 | |
| 1137 ASSERT3U(bc->bc_errno, ==, 0); | |
| 1138 | |
| 1139 /* | |
| 1140 * Since this callback is not called concurrently, no lock is | |
| 1141 * needed on the accounting values. | |
| 1142 */ | |
| 2082 | 1143 *ka->usedp += bp_get_dasize(spa, bp); |
| 789 | 1144 *ka->compressedp += BP_GET_PSIZE(bp); |
| 1145 *ka->uncompressedp += BP_GET_UCSIZE(bp); | |
| 1146 /* XXX check for EIO? */ | |
|
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1147 (void) dsl_free(ka->zio, spa_get_dsl(spa), ka->tx->tx_txg, |
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1148 bp, NULL, NULL, ARC_NOWAIT); |
| 789 | 1149 return (0); |
| 1150 } | |
| 1151 | |
| 1152 /* ARGSUSED */ | |
| 2199 | 1153 static int |
| 1154 dsl_dataset_rollback_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 789 | 1155 { |
| 2199 | 1156 dsl_dataset_t *ds = arg1; |
| 5367 | 1157 dmu_objset_type_t *ost = arg2; |
| 789 | 1158 |
| 2199 | 1159 /* |
| 5367 | 1160 * We can only roll back to emptyness if it is a ZPL objset. |
| 2199 | 1161 */ |
| 5367 | 1162 if (*ost != DMU_OST_ZFS && ds->ds_phys->ds_prev_snap_txg == 0) |
| 789 | 1163 return (EINVAL); |
| 1164 | |
| 2199 | 1165 /* |
| 1166 * This must not be a snapshot. | |
| 1167 */ | |
| 1168 if (ds->ds_phys->ds_next_snap_obj != 0) | |
| 1169 return (EINVAL); | |
| 789 | 1170 |
| 1171 /* | |
| 1172 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1173 * them. Try again. | |
| 1174 */ | |
| 2199 | 1175 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1176 return (EAGAIN); |
| 2199 | 1177 |
| 1178 return (0); | |
| 1179 } | |
| 789 | 1180 |
| 2199 | 1181 /* ARGSUSED */ |
| 1182 static void | |
| 4543 | 1183 dsl_dataset_rollback_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1184 { |
| 1185 dsl_dataset_t *ds = arg1; | |
| 5367 | 1186 dmu_objset_type_t *ost = arg2; |
| 2199 | 1187 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 789 | 1188 |
| 1189 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1190 | |
|
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1191 /* |
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1192 * Before the roll back destroy the zil. |
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1193 */ |
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1194 if (ds->ds_user_ptr != NULL) { |
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1195 zil_rollback_destroy( |
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1196 ((objset_impl_t *)ds->ds_user_ptr)->os_zil, tx); |
| 5367 | 1197 |
| 1198 /* | |
| 1199 * We need to make sure that the objset_impl_t is reopened after | |
| 1200 * we do the rollback, otherwise it will have the wrong | |
| 1201 * objset_phys_t. Normally this would happen when this | |
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1202 * dataset-open is closed, thus causing the |
| 5367 | 1203 * dataset to be immediately evicted. But when doing "zfs recv |
| 1204 * -F", we reopen the objset before that, so that there is no | |
| 1205 * window where the dataset is closed and inconsistent. | |
| 1206 */ | |
| 1207 ds->ds_user_evict_func(ds, ds->ds_user_ptr); | |
| 1208 ds->ds_user_ptr = NULL; | |
|
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1209 } |
|
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1210 |
| 789 | 1211 /* Zero out the deadlist. */ |
| 1212 bplist_close(&ds->ds_deadlist); | |
| 1213 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1214 ds->ds_phys->ds_deadlist_obj = | |
| 1215 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1216 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1217 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1218 |
| 1219 { | |
| 1220 /* Free blkptrs that we gave birth to */ | |
| 1221 zio_t *zio; | |
|
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1222 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 789 | 1223 struct killarg ka; |
|
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1224 int64_t delta; |
| 789 | 1225 |
| 1226 zio = zio_root(tx->tx_pool->dp_spa, NULL, NULL, | |
| 1227 ZIO_FLAG_MUSTSUCCEED); | |
| 1228 ka.usedp = &used; | |
| 1229 ka.compressedp = &compressed; | |
| 1230 ka.uncompressedp = &uncompressed; | |
| 1231 ka.zio = zio; | |
| 1232 ka.tx = tx; | |
| 1233 (void) traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1234 ADVANCE_POST, kill_blkptr, &ka); | |
| 1235 (void) zio_wait(zio); | |
| 1236 | |
|
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1237 /* only deduct space beyond any refreservation */ |
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1238 delta = parent_delta(ds, -used); |
| 2199 | 1239 dsl_dir_diduse_space(ds->ds_dir, |
|
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1240 delta, -compressed, -uncompressed, tx); |
| 789 | 1241 } |
| 1242 | |
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1243 if (ds->ds_prev && ds->ds_prev != ds->ds_dir->dd_pool->dp_origin_snap) { |
| 5367 | 1244 /* Change our contents to that of the prev snapshot */ |
| 1245 ASSERT3U(ds->ds_prev->ds_object, ==, | |
| 1246 ds->ds_phys->ds_prev_snap_obj); | |
| 1247 ds->ds_phys->ds_bp = ds->ds_prev->ds_phys->ds_bp; | |
| 1248 ds->ds_phys->ds_used_bytes = | |
| 1249 ds->ds_prev->ds_phys->ds_used_bytes; | |
| 1250 ds->ds_phys->ds_compressed_bytes = | |
| 1251 ds->ds_prev->ds_phys->ds_compressed_bytes; | |
| 1252 ds->ds_phys->ds_uncompressed_bytes = | |
| 1253 ds->ds_prev->ds_phys->ds_uncompressed_bytes; | |
| 1254 ds->ds_phys->ds_flags = ds->ds_prev->ds_phys->ds_flags; | |
| 1255 ds->ds_phys->ds_unique_bytes = 0; | |
| 789 | 1256 |
| 5367 | 1257 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { |
| 1258 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 1259 ds->ds_prev->ds_phys->ds_unique_bytes = 0; | |
| 1260 } | |
| 1261 } else { | |
|
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1262 objset_impl_t *osi; |
|
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1263 |
| 5367 | 1264 /* Zero out our contents, recreate objset */ |
| 1265 bzero(&ds->ds_phys->ds_bp, sizeof (blkptr_t)); | |
| 1266 ds->ds_phys->ds_used_bytes = 0; | |
| 1267 ds->ds_phys->ds_compressed_bytes = 0; | |
| 1268 ds->ds_phys->ds_uncompressed_bytes = 0; | |
| 1269 ds->ds_phys->ds_flags = 0; | |
| 1270 ds->ds_phys->ds_unique_bytes = 0; | |
|
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1271 osi = dmu_objset_create_impl(ds->ds_dir->dd_pool->dp_spa, ds, |
| 5367 | 1272 &ds->ds_phys->ds_bp, *ost, tx); |
|
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1273 #ifdef _KERNEL |
|
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1274 zfs_create_fs(&osi->os, kcred, NULL, tx); |
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1275 #endif |
|
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1276 } |
| 4543 | 1277 |
| 1278 spa_history_internal_log(LOG_DS_ROLLBACK, ds->ds_dir->dd_pool->dp_spa, | |
| 1279 tx, cr, "dataset = %llu", ds->ds_object); | |
| 789 | 1280 } |
| 1281 | |
|
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1282 /* ARGSUSED */ |
|
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1283 static int |
| 2199 | 1284 dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
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1285 { |
| 2199 | 1286 dsl_dataset_t *ds = arg1; |
| 5367 | 1287 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
| 1288 uint64_t count; | |
| 1289 int err; | |
|
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1290 |
|
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1291 /* |
|
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1292 * Can't delete a head dataset if there are snapshots of it. |
|
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1293 * (Except if the only snapshots are from the branch we cloned |
|
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1294 * from.) |
|
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1295 */ |
|
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1296 if (ds->ds_prev != NULL && |
|
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1297 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
|
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1298 return (EINVAL); |
|
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1299 |
| 5367 | 1300 /* |
| 1301 * This is really a dsl_dir thing, but check it here so that | |
| 1302 * we'll be less likely to leave this dataset inconsistent & | |
| 1303 * nearly destroyed. | |
| 1304 */ | |
| 1305 err = zap_count(mos, ds->ds_dir->dd_phys->dd_child_dir_zapobj, &count); | |
| 1306 if (err) | |
| 1307 return (err); | |
| 1308 if (count != 0) | |
| 1309 return (EEXIST); | |
| 1310 | |
|
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1311 return (0); |
|
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1312 } |
|
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1313 |
| 2199 | 1314 /* ARGSUSED */ |
| 1315 static void | |
| 4543 | 1316 dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1317 { |
| 2199 | 1318 dsl_dataset_t *ds = arg1; |
| 4543 | 1319 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
| 789 | 1320 |
| 2199 | 1321 /* Mark it as inconsistent on-disk, in case we crash */ |
| 1322 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1323 ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
| 4543 | 1324 |
| 1325 spa_history_internal_log(LOG_DS_DESTROY_BEGIN, dp->dp_spa, tx, | |
| 1326 cr, "dataset = %llu", ds->ds_object); | |
| 2199 | 1327 } |
| 789 | 1328 |
| 2199 | 1329 /* ARGSUSED */ |
| 5367 | 1330 int |
| 2199 | 1331 dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 1332 { | |
| 1333 dsl_dataset_t *ds = arg1; | |
| 789 | 1334 |
|
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1335 /* we have an owner hold, so noone else can destroy us */ |
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1336 ASSERT(!DSL_DATASET_IS_DESTROYED(ds)); |
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1337 |
| 789 | 1338 /* Can't delete a branch point. */ |
| 2199 | 1339 if (ds->ds_phys->ds_num_children > 1) |
| 1340 return (EEXIST); | |
| 789 | 1341 |
| 1342 /* | |
| 1343 * Can't delete a head dataset if there are snapshots of it. | |
| 1344 * (Except if the only snapshots are from the branch we cloned | |
| 1345 * from.) | |
| 1346 */ | |
| 1347 if (ds->ds_prev != NULL && | |
| 2199 | 1348 ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) |
| 789 | 1349 return (EINVAL); |
| 1350 | |
| 1351 /* | |
| 1352 * If we made changes this txg, traverse_dsl_dataset won't find | |
| 1353 * them. Try again. | |
| 1354 */ | |
| 2199 | 1355 if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg) |
| 789 | 1356 return (EAGAIN); |
| 2199 | 1357 |
| 1358 /* XXX we should do some i/o error checking... */ | |
| 1359 return (0); | |
| 1360 } | |
| 1361 | |
|
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1362 struct refsarg { |
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1363 kmutex_t lock; |
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1364 boolean_t gone; |
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1365 kcondvar_t cv; |
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1366 }; |
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1367 |
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1368 /* ARGSUSED */ |
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1369 static void |
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1370 dsl_dataset_refs_gone(dmu_buf_t *db, void *argv) |
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1371 { |
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1372 struct refsarg *arg = argv; |
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1373 |
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1374 mutex_enter(&arg->lock); |
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1375 arg->gone = TRUE; |
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1376 cv_signal(&arg->cv); |
|
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1377 mutex_exit(&arg->lock); |
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1378 } |
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1379 |
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1380 static void |
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1381 dsl_dataset_drain_refs(dsl_dataset_t *ds, void *tag) |
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1382 { |
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1383 struct refsarg arg; |
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1384 |
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1385 mutex_init(&arg.lock, NULL, MUTEX_DEFAULT, NULL); |
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1386 cv_init(&arg.cv, NULL, CV_DEFAULT, NULL); |
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1387 arg.gone = FALSE; |
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1388 (void) dmu_buf_update_user(ds->ds_dbuf, ds, &arg, &ds->ds_phys, |
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1389 dsl_dataset_refs_gone); |
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1390 dmu_buf_rele(ds->ds_dbuf, tag); |
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1391 mutex_enter(&arg.lock); |
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1392 while (!arg.gone) |
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1393 cv_wait(&arg.cv, &arg.lock); |
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1394 ASSERT(arg.gone); |
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1395 mutex_exit(&arg.lock); |
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1396 ds->ds_dbuf = NULL; |
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1397 ds->ds_phys = NULL; |
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1398 mutex_destroy(&arg.lock); |
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1399 cv_destroy(&arg.cv); |
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1400 } |
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1401 |
| 5367 | 1402 void |
| 4543 | 1403 dsl_dataset_destroy_sync(void *arg1, void *tag, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 1404 { |
| 1405 dsl_dataset_t *ds = arg1; | |
|
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1406 int64_t used = 0, compressed = 0, uncompressed = 0; |
| 2199 | 1407 zio_t *zio; |
| 1408 int err; | |
| 1409 int after_branch_point = FALSE; | |
| 1410 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 1411 objset_t *mos = dp->dp_meta_objset; | |
| 1412 dsl_dataset_t *ds_prev = NULL; | |
| 1413 uint64_t obj; | |
| 1414 | |
|
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1415 ASSERT(ds->ds_owner); |
| 2199 | 1416 ASSERT3U(ds->ds_phys->ds_num_children, <=, 1); |
| 1417 ASSERT(ds->ds_prev == NULL || | |
| 1418 ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object); | |
| 1419 ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg); | |
| 1420 | |
|
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1421 /* signal any waiters that this dataset is going away */ |
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1422 mutex_enter(&ds->ds_lock); |
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1423 ds->ds_owner = dsl_reaper; |
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1424 cv_broadcast(&ds->ds_exclusive_cv); |
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1425 mutex_exit(&ds->ds_lock); |
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1426 |
|
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1427 /* Remove our reservation */ |
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1428 if (ds->ds_reserved != 0) { |
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1429 uint64_t val = 0; |
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1430 dsl_dataset_set_reservation_sync(ds, &val, cr, tx); |
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1431 ASSERT3U(ds->ds_reserved, ==, 0); |
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1432 } |
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1433 |
| 2199 | 1434 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 1435 | |
|
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1436 dsl_pool_ds_destroyed(ds, tx); |
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1437 |
| 2199 | 1438 obj = ds->ds_object; |
| 789 | 1439 |
| 1440 if (ds->ds_phys->ds_prev_snap_obj != 0) { | |
| 1441 if (ds->ds_prev) { | |
| 1442 ds_prev = ds->ds_prev; | |
| 1443 } else { | |
|
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1444 VERIFY(0 == dsl_dataset_hold_obj(dp, |
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1445 ds->ds_phys->ds_prev_snap_obj, FTAG, &ds_prev)); |
| 789 | 1446 } |
| 1447 after_branch_point = | |
| 1448 (ds_prev->ds_phys->ds_next_snap_obj != obj); | |
| 1449 | |
| 1450 dmu_buf_will_dirty(ds_prev->ds_dbuf, tx); | |
| 1451 if (after_branch_point && | |
|
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1452 ds_prev->ds_phys->ds_next_clones_obj != 0) { |
|
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1453 VERIFY(0 == zap_remove_int(mos, |
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1454 ds_prev->ds_phys->ds_next_clones_obj, obj, tx)); |
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1455 if (ds->ds_phys->ds_next_snap_obj != 0) { |
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1456 VERIFY(0 == zap_add_int(mos, |
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1457 ds_prev->ds_phys->ds_next_clones_obj, |
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1458 ds->ds_phys->ds_next_snap_obj, tx)); |
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1459 } |
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1460 } |
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1461 if (after_branch_point && |
| 789 | 1462 ds->ds_phys->ds_next_snap_obj == 0) { |
| 1463 /* This clone is toast. */ | |
| 1464 ASSERT(ds_prev->ds_phys->ds_num_children > 1); | |
| 1465 ds_prev->ds_phys->ds_num_children--; | |
| 1466 } else if (!after_branch_point) { | |
| 1467 ds_prev->ds_phys->ds_next_snap_obj = | |
| 1468 ds->ds_phys->ds_next_snap_obj; | |
| 1469 } | |
| 1470 } | |
| 1471 | |
| 1472 zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED); | |
| 1473 | |
| 1474 if (ds->ds_phys->ds_next_snap_obj != 0) { | |
| 2199 | 1475 blkptr_t bp; |
| 789 | 1476 dsl_dataset_t *ds_next; |
| 1477 uint64_t itor = 0; | |
|
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1478 uint64_t old_unique; |
| 789 | 1479 |
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1480 VERIFY(0 == dsl_dataset_hold_obj(dp, |
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1481 ds->ds_phys->ds_next_snap_obj, FTAG, &ds_next)); |
| 789 | 1482 ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj); |
| 1483 | |
|
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1484 old_unique = dsl_dataset_unique(ds_next); |
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1485 |
| 789 | 1486 dmu_buf_will_dirty(ds_next->ds_dbuf, tx); |
| 1487 ds_next->ds_phys->ds_prev_snap_obj = | |
| 1488 ds->ds_phys->ds_prev_snap_obj; | |
| 1489 ds_next->ds_phys->ds_prev_snap_txg = | |
| 1490 ds->ds_phys->ds_prev_snap_txg; | |
| 1491 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, | |
| 1492 ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0); | |
| 1493 | |
| 1494 /* | |
| 1495 * Transfer to our deadlist (which will become next's | |
| 1496 * new deadlist) any entries from next's current | |
| 1497 * deadlist which were born before prev, and free the | |
| 1498 * other entries. | |
| 1499 * | |
| 1500 * XXX we're doing this long task with the config lock held | |
| 1501 */ | |
|
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1502 while (bplist_iterate(&ds_next->ds_deadlist, &itor, &bp) == 0) { |
| 789 | 1503 if (bp.blk_birth <= ds->ds_phys->ds_prev_snap_txg) { |
| 1544 | 1504 VERIFY(0 == bplist_enqueue(&ds->ds_deadlist, |
| 1505 &bp, tx)); | |
| 789 | 1506 if (ds_prev && !after_branch_point && |
| 1507 bp.blk_birth > | |
| 1508 ds_prev->ds_phys->ds_prev_snap_txg) { | |
| 1509 ds_prev->ds_phys->ds_unique_bytes += | |
| 2082 | 1510 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1511 } |
| 1512 } else { | |
| 2082 | 1513 used += bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1514 compressed += BP_GET_PSIZE(&bp); |
| 1515 uncompressed += BP_GET_UCSIZE(&bp); | |
| 1516 /* XXX check return value? */ | |
|
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1517 (void) dsl_free(zio, dp, tx->tx_txg, |
| 789 | 1518 &bp, NULL, NULL, ARC_NOWAIT); |
| 1519 } | |
| 1520 } | |
| 1521 | |
| 1522 /* free next's deadlist */ | |
| 1523 bplist_close(&ds_next->ds_deadlist); | |
| 1524 bplist_destroy(mos, ds_next->ds_phys->ds_deadlist_obj, tx); | |
| 1525 | |
| 1526 /* set next's deadlist to our deadlist */ | |
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1527 bplist_close(&ds->ds_deadlist); |
| 789 | 1528 ds_next->ds_phys->ds_deadlist_obj = |
| 1529 ds->ds_phys->ds_deadlist_obj; | |
| 1544 | 1530 VERIFY(0 == bplist_open(&ds_next->ds_deadlist, mos, |
| 1531 ds_next->ds_phys->ds_deadlist_obj)); | |
| 789 | 1532 ds->ds_phys->ds_deadlist_obj = 0; |
| 1533 | |
| 1534 if (ds_next->ds_phys->ds_next_snap_obj != 0) { | |
| 1535 /* | |
| 1536 * Update next's unique to include blocks which | |
| 1537 * were previously shared by only this snapshot | |
| 1538 * and it. Those blocks will be born after the | |
| 1539 * prev snap and before this snap, and will have | |
| 1540 * died after the next snap and before the one | |
| 1541 * after that (ie. be on the snap after next's | |
| 1542 * deadlist). | |
| 1543 * | |
| 1544 * XXX we're doing this long task with the | |
| 1545 * config lock held | |
| 1546 */ | |
| 1547 dsl_dataset_t *ds_after_next; | |
| 1548 | |
|
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1549 VERIFY(0 == dsl_dataset_hold_obj(dp, |
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1550 ds_next->ds_phys->ds_next_snap_obj, |
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1551 FTAG, &ds_after_next)); |
| 789 | 1552 itor = 0; |
| 1553 while (bplist_iterate(&ds_after_next->ds_deadlist, | |
| 1554 &itor, &bp) == 0) { | |
| 1555 if (bp.blk_birth > | |
| 1556 ds->ds_phys->ds_prev_snap_txg && | |
| 1557 bp.blk_birth <= | |
| 1558 ds->ds_phys->ds_creation_txg) { | |
| 1559 ds_next->ds_phys->ds_unique_bytes += | |
| 2082 | 1560 bp_get_dasize(dp->dp_spa, &bp); |
| 789 | 1561 } |
| 1562 } | |
| 1563 | |
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1564 dsl_dataset_rele(ds_after_next, FTAG); |
| 789 | 1565 ASSERT3P(ds_next->ds_prev, ==, NULL); |
| 1566 } else { | |
| 1567 ASSERT3P(ds_next->ds_prev, ==, ds); | |
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1568 dsl_dataset_drop_ref(ds_next->ds_prev, ds_next); |
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1569 ds_next->ds_prev = NULL; |
| 789 | 1570 if (ds_prev) { |
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1571 VERIFY(0 == dsl_dataset_get_ref(dp, |
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1572 ds->ds_phys->ds_prev_snap_obj, |
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1573 ds_next, &ds_next->ds_prev)); |
| 789 | 1574 } |
|
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1575 |
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1576 dsl_dataset_recalc_head_uniq(ds_next); |
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1577 |
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1578 /* |
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1579 * Reduce the amount of our unconsmed refreservation |
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1580 * being charged to our parent by the amount of |
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1581 * new unique data we have gained. |
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1582 */ |
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1583 if (old_unique < ds_next->ds_reserved) { |
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1584 int64_t mrsdelta; |
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1585 uint64_t new_unique = |
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1586 ds_next->ds_phys->ds_unique_bytes; |
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1587 |
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1588 ASSERT(old_unique <= new_unique); |
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1589 mrsdelta = MIN(new_unique - old_unique, |
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1590 ds_next->ds_reserved - old_unique); |
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1591 dsl_dir_diduse_space(ds->ds_dir, -mrsdelta, |
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1592 0, 0, tx); |
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1593 } |
| 789 | 1594 } |
|
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1595 dsl_dataset_rele(ds_next, FTAG); |
| 789 | 1596 |
| 1597 /* | |
|
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1598 * NB: unique_bytes might not be accurate for the head objset. |
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1599 * Before SPA_VERSION 9, we didn't update its value when we |
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1600 * deleted the most recent snapshot. |
| 789 | 1601 */ |
| 1602 ASSERT3U(used, ==, ds->ds_phys->ds_unique_bytes); | |
| 1603 } else { | |
| 1604 /* | |
| 1605 * There's no next snapshot, so this is a head dataset. | |
| 1606 * Destroy the deadlist. Unless it's a clone, the | |
| 1607 * deadlist should be empty. (If it's a clone, it's | |
| 1608 * safe to ignore the deadlist contents.) | |
| 1609 */ | |
| 1610 struct killarg ka; | |
| 1611 | |
| 1612 ASSERT(after_branch_point || bplist_empty(&ds->ds_deadlist)); | |
| 1613 bplist_close(&ds->ds_deadlist); | |
| 1614 bplist_destroy(mos, ds->ds_phys->ds_deadlist_obj, tx); | |
| 1615 ds->ds_phys->ds_deadlist_obj = 0; | |
| 1616 | |
| 1617 /* | |
| 1618 * Free everything that we point to (that's born after | |
| 1619 * the previous snapshot, if we are a clone) | |
| 1620 * | |
| 1621 * XXX we're doing this long task with the config lock held | |
| 1622 */ | |
| 1623 ka.usedp = &used; | |
| 1624 ka.compressedp = &compressed; | |
| 1625 ka.uncompressedp = &uncompressed; | |
| 1626 ka.zio = zio; | |
| 1627 ka.tx = tx; | |
| 1628 err = traverse_dsl_dataset(ds, ds->ds_phys->ds_prev_snap_txg, | |
| 1629 ADVANCE_POST, kill_blkptr, &ka); | |
| 1630 ASSERT3U(err, ==, 0); | |
|
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1631 ASSERT(spa_version(dp->dp_spa) < |
|
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1632 SPA_VERSION_UNIQUE_ACCURATE || |
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1633 used == ds->ds_phys->ds_unique_bytes); |
| 789 | 1634 } |
| 1635 | |
| 1636 err = zio_wait(zio); | |
| 1637 ASSERT3U(err, ==, 0); | |
| 1638 | |
| 2199 | 1639 dsl_dir_diduse_space(ds->ds_dir, -used, -compressed, -uncompressed, tx); |
| 789 | 1640 |
|
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1641 if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) { |
|
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1642 /* Erase the link in the dir */ |
|
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1643 dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx); |
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1644 ds->ds_dir->dd_phys->dd_head_dataset_obj = 0; |
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1645 ASSERT(ds->ds_phys->ds_snapnames_zapobj != 0); |
| 789 | 1646 err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx); |
| 1647 ASSERT(err == 0); | |
| 1648 } else { | |
| 1649 /* remove from snapshot namespace */ | |
| 1650 dsl_dataset_t *ds_head; | |
|
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1651 ASSERT(ds->ds_phys->ds_snapnames_zapobj == 0); |
|
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1652 VERIFY(0 == dsl_dataset_hold_obj(dp, |
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1653 ds->ds_dir->dd_phys->dd_head_dataset_obj, FTAG, &ds_head)); |
|
2207
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1654 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
| 789 | 1655 #ifdef ZFS_DEBUG |
| 1656 { | |
| 1657 uint64_t val; | |
|
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1658 |
|
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1659 err = dsl_dataset_snap_lookup(ds_head, |
|
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|
1660 ds->ds_snapname, &val); |
| 789 | 1661 ASSERT3U(err, ==, 0); |
| 1662 ASSERT3U(val, ==, obj); | |
| 1663 } | |
| 1664 #endif | |
|
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1665 err = dsl_dataset_snap_remove(ds_head, ds->ds_snapname, tx); |
| 789 | 1666 ASSERT(err == 0); |
|
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1667 dsl_dataset_rele(ds_head, FTAG); |
| 789 | 1668 } |
| 1669 | |
| 1670 if (ds_prev && ds->ds_prev != ds_prev) | |
|
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1671 dsl_dataset_rele(ds_prev, FTAG); |
| 789 | 1672 |
| 5094 | 1673 spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx); |
| 4543 | 1674 spa_history_internal_log(LOG_DS_DESTROY, dp->dp_spa, tx, |
| 1675 cr, "dataset = %llu", ds->ds_object); | |
| 1676 | |
|
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1677 if (ds->ds_phys->ds_next_clones_obj != 0) { |
|
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1678 uint64_t count; |
|
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1679 ASSERT(0 == zap_count(mos, |
|
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1680 ds->ds_phys->ds_next_clones_obj, &count) && count == 0); |
|
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|
1681 VERIFY(0 == dmu_object_free(mos, |
|
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|
1682 ds->ds_phys->ds_next_clones_obj, tx)); |
|
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|
1683 } |
| 7265 | 1684 if (ds->ds_phys->ds_props_obj != 0) { |
| 1685 VERIFY(0 == zap_destroy(mos, | |
| 1686 ds->ds_phys->ds_props_obj, tx)); | |
| 1687 } | |
|
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|
1688 dsl_dir_close(ds->ds_dir, ds); |
|
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|
1689 ds->ds_dir = NULL; |
|
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|
1690 dsl_dataset_drain_refs(ds, tag); |
| 2199 | 1691 VERIFY(0 == dmu_object_free(mos, obj, tx)); |
| 1692 } | |
| 1693 | |
|
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1694 static int |
|
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|
1695 dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx) |
|
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|
1696 { |
|
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|
1697 uint64_t asize; |
|
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|
1698 |
|
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1699 if (!dmu_tx_is_syncing(tx)) |
|
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|
1700 return (0); |
|
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|
1701 |
|
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|
1702 /* |
|
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1703 * If there's an fs-only reservation, any blocks that might become |
|
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1704 * owned by the snapshot dataset must be accommodated by space |
|
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1705 * outside of the reservation. |
|
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|
1706 */ |
|
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1707 asize = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
|
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1708 if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, FALSE)) |
|
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1709 return (ENOSPC); |
|
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|
1710 |
|
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|
1711 /* |
|
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1712 * Propogate any reserved space for this snapshot to other |
|
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1713 * snapshot checks in this sync group. |
|
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|
1714 */ |
|
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|
1715 if (asize > 0) |
|
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1716 dsl_dir_willuse_space(ds->ds_dir, asize, tx); |
|
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1717 |
|
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|
1718 return (0); |
|
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|
1719 } |
|
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|
1720 |
| 2199 | 1721 /* ARGSUSED */ |
| 1722 int | |
| 1723 dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 1724 { | |
| 5367 | 1725 dsl_dataset_t *ds = arg1; |
| 2199 | 1726 const char *snapname = arg2; |
| 1727 int err; | |
| 1728 uint64_t value; | |
| 789 | 1729 |
| 1730 /* | |
| 2199 | 1731 * We don't allow multiple snapshots of the same txg. If there |
| 1732 * is already one, try again. | |
| 1733 */ | |
| 1734 if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg) | |
| 1735 return (EAGAIN); | |
| 1736 | |
| 1737 /* | |
| 1738 * Check for conflicting name snapshot name. | |
| 789 | 1739 */ |
|
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1740 err = dsl_dataset_snap_lookup(ds, snapname, &value); |
| 2199 | 1741 if (err == 0) |
| 1742 return (EEXIST); | |
| 1743 if (err != ENOENT) | |
| 1744 return (err); | |
| 789 | 1745 |
|
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1746 /* |
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1747 * Check that the dataset's name is not too long. Name consists |
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1748 * of the dataset's length + 1 for the @-sign + snapshot name's length |
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1749 */ |
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1750 if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN) |
|
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1751 return (ENAMETOOLONG); |
|
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1752 |
|
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1753 err = dsl_dataset_snapshot_reserve_space(ds, tx); |
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1754 if (err) |
|
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1755 return (err); |
|
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|
1756 |
| 2199 | 1757 ds->ds_trysnap_txg = tx->tx_txg; |
| 789 | 1758 return (0); |
| 1759 } | |
| 1760 | |
| 2199 | 1761 void |
| 4543 | 1762 dsl_dataset_snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 789 | 1763 { |
| 5367 | 1764 dsl_dataset_t *ds = arg1; |
| 2199 | 1765 const char *snapname = arg2; |
| 1766 dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
| 789 | 1767 dmu_buf_t *dbuf; |
| 1768 dsl_dataset_phys_t *dsphys; | |
|
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1769 uint64_t dsobj, crtxg; |
| 789 | 1770 objset_t *mos = dp->dp_meta_objset; |
| 1771 int err; | |
| 1772 | |
| 2199 | 1773 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); |
| 789 | 1774 |
|
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1775 /* |
|
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1776 * The origin's ds_creation_txg has to be < TXG_INITIAL |
|
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1777 */ |
|
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1778 if (strcmp(snapname, ORIGIN_DIR_NAME) == 0) |
|
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|
1779 crtxg = 1; |
|
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|
1780 else |
|
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1781 crtxg = tx->tx_txg; |
|
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|
1782 |
|
928
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|
1783 dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0, |
|
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|
1784 DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx); |
| 1544 | 1785 VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf)); |
| 789 | 1786 dmu_buf_will_dirty(dbuf, tx); |
| 1787 dsphys = dbuf->db_data; | |
|
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1788 bzero(dsphys, sizeof (dsl_dataset_phys_t)); |
| 2199 | 1789 dsphys->ds_dir_obj = ds->ds_dir->dd_object; |
| 789 | 1790 dsphys->ds_fsid_guid = unique_create(); |
| 1791 (void) random_get_pseudo_bytes((void*)&dsphys->ds_guid, | |
| 1792 sizeof (dsphys->ds_guid)); | |
| 1793 dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj; | |
| 1794 dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg; | |
| 1795 dsphys->ds_next_snap_obj = ds->ds_object; | |
| 1796 dsphys->ds_num_children = 1; | |
| 1797 dsphys->ds_creation_time = gethrestime_sec(); | |
|
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1798 dsphys->ds_creation_txg = crtxg; |
| 789 | 1799 dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj; |
| 1800 dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes; | |
| 1801 dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes; | |
| 1802 dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes; | |
| 2082 | 1803 dsphys->ds_flags = ds->ds_phys->ds_flags; |
| 789 | 1804 dsphys->ds_bp = ds->ds_phys->ds_bp; |
| 1544 | 1805 dmu_buf_rele(dbuf, FTAG); |
| 789 | 1806 |
| 2199 | 1807 ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0); |
| 1808 if (ds->ds_prev) { | |
|
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1809 uint64_t next_clones_obj = |
|
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1810 ds->ds_prev->ds_phys->ds_next_clones_obj; |
| 2199 | 1811 ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj == |
| 789 | 1812 ds->ds_object || |
| 2199 | 1813 ds->ds_prev->ds_phys->ds_num_children > 1); |
| 1814 if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) { | |
| 1815 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
| 789 | 1816 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==, |
| 2199 | 1817 ds->ds_prev->ds_phys->ds_creation_txg); |
| 1818 ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj; | |
|
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1819 } else if (next_clones_obj != 0) { |
|
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|
1820 VERIFY3U(0, ==, zap_remove_int(mos, |
|
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|
1821 next_clones_obj, dsphys->ds_next_snap_obj, tx)); |
|
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1822 VERIFY3U(0, ==, zap_add_int(mos, |
|
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|
1823 next_clones_obj, dsobj, tx)); |
| 789 | 1824 } |
| 1825 } | |
| 1826 | |
|
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1827 /* |
|
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|
1828 * If we have a reference-reservation on this dataset, we will |
|
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|
1829 * need to increase the amount of refreservation being charged |
|
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1830 * since our unique space is going to zero. |
|
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|
1831 */ |
|
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|
1832 if (ds->ds_reserved) { |
|
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|
1833 int64_t add = MIN(dsl_dataset_unique(ds), ds->ds_reserved); |
|
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|
1834 dsl_dir_diduse_space(ds->ds_dir, add, 0, 0, tx); |
|
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|
1835 } |
|
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|
1836 |
| 789 | 1837 bplist_close(&ds->ds_deadlist); |
| 1838 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
|
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|
1839 ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, tx->tx_txg); |
| 789 | 1840 ds->ds_phys->ds_prev_snap_obj = dsobj; |
|
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|
1841 ds->ds_phys->ds_prev_snap_txg = crtxg; |
| 789 | 1842 ds->ds_phys->ds_unique_bytes = 0; |
|
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1843 if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE) |
|
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|
1844 ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE; |
| 789 | 1845 ds->ds_phys->ds_deadlist_obj = |
| 1846 bplist_create(mos, DSL_DEADLIST_BLOCKSIZE, tx); | |
| 1544 | 1847 VERIFY(0 == bplist_open(&ds->ds_deadlist, mos, |
| 1848 ds->ds_phys->ds_deadlist_obj)); | |
| 789 | 1849 |
| 1850 dprintf("snap '%s' -> obj %llu\n", snapname, dsobj); | |
| 1851 err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj, | |
| 1852 snapname, 8, 1, &dsobj, tx); | |
| 1853 ASSERT(err == 0); | |
| 1854 | |
| 1855 if (ds->ds_prev) | |
|
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|
1856 dsl_dataset_drop_ref(ds->ds_prev, ds); |
|
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|
1857 VERIFY(0 == dsl_dataset_get_ref(dp, |
|
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|
1858 ds->ds_phys->ds_prev_snap_obj, ds, &ds->ds_prev)); |
| 4543 | 1859 |
|
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|
1860 dsl_pool_ds_snapshotted(ds, tx); |
|
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|
1861 |
| 4543 | 1862 spa_history_internal_log(LOG_DS_SNAPSHOT, dp->dp_spa, tx, cr, |
|
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|
1863 "dataset = %llu", dsobj); |
| 789 | 1864 } |
| 1865 | |
| 1866 void | |
|
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|
1867 dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) |
| 789 | 1868 { |
| 1869 ASSERT(dmu_tx_is_syncing(tx)); | |
| 1870 ASSERT(ds->ds_user_ptr != NULL); | |
| 1871 ASSERT(ds->ds_phys->ds_next_snap_obj == 0); | |
| 1872 | |
| 4787 | 1873 /* |
| 1874 * in case we had to change ds_fsid_guid when we opened it, | |
| 1875 * sync it out now. | |
| 1876 */ | |
| 1877 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 1878 ds->ds_phys->ds_fsid_guid = ds->ds_fsid_guid; | |
| 1879 | |
| 789 | 1880 dsl_dir_dirty(ds->ds_dir, tx); |
|
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1881 dmu_objset_sync(ds->ds_user_ptr, zio, tx); |
| 789 | 1882 } |
| 1883 | |
| 1884 void | |
| 2885 | 1885 dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv) |
| 789 | 1886 { |
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1887 uint64_t refd, avail, uobjs, aobjs; |
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1888 |
| 2885 | 1889 dsl_dir_stats(ds->ds_dir, nv); |
| 789 | 1890 |
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1891 dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs); |
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1892 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail); |
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1893 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd); |
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1894 |
| 2885 | 1895 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION, |
| 1896 ds->ds_phys->ds_creation_time); | |
| 1897 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG, | |
| 1898 ds->ds_phys->ds_creation_txg); | |
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1899 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA, |
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1900 ds->ds_quota); |
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1901 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION, |
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1902 ds->ds_reserved); |
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1903 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID, |
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1904 ds->ds_phys->ds_guid); |
| 789 | 1905 |
| 1906 if (ds->ds_phys->ds_next_snap_obj) { | |
| 1907 /* | |
| 1908 * This is a snapshot; override the dd's space used with | |
| 2885 | 1909 * our unique space and compression ratio. |
| 789 | 1910 */ |
| 2885 | 1911 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, |
| 1912 ds->ds_phys->ds_unique_bytes); | |
| 1913 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, | |
| 1914 ds->ds_phys->ds_compressed_bytes == 0 ? 100 : | |
| 1915 (ds->ds_phys->ds_uncompressed_bytes * 100 / | |
| 1916 ds->ds_phys->ds_compressed_bytes)); | |
| 789 | 1917 } |
| 1918 } | |
| 1919 | |
| 2885 | 1920 void |
| 1921 dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat) | |
| 789 | 1922 { |
| 2885 | 1923 stat->dds_creation_txg = ds->ds_phys->ds_creation_txg; |
| 1924 stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT; | |
| 5367 | 1925 stat->dds_guid = ds->ds_phys->ds_guid; |
| 2885 | 1926 if (ds->ds_phys->ds_next_snap_obj) { |
| 1927 stat->dds_is_snapshot = B_TRUE; | |
| 1928 stat->dds_num_clones = ds->ds_phys->ds_num_children - 1; | |
| 1929 } | |
| 1930 | |
| 1931 /* clone origin is really a dsl_dir thing... */ | |
| 5446 | 1932 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); |
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1933 if (dsl_dir_is_clone(ds->ds_dir)) { |
| 2885 | 1934 dsl_dataset_t *ods; |
| 1935 | |
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1936 VERIFY(0 == dsl_dataset_get_ref(ds->ds_dir->dd_pool, |
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1937 ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &ods)); |
| 5367 | 1938 dsl_dataset_name(ods, stat->dds_origin); |
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1939 dsl_dataset_drop_ref(ods, FTAG); |
| 2885 | 1940 } |
| 5446 | 1941 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); |
| 2885 | 1942 } |
| 1943 | |
| 1944 uint64_t | |
| 1945 dsl_dataset_fsid_guid(dsl_dataset_t *ds) | |
| 1946 { | |
| 4787 | 1947 return (ds->ds_fsid_guid); |
| 2885 | 1948 } |
| 1949 | |
| 1950 void | |
| 1951 dsl_dataset_space(dsl_dataset_t *ds, | |
| 1952 uint64_t *refdbytesp, uint64_t *availbytesp, | |
| 1953 uint64_t *usedobjsp, uint64_t *availobjsp) | |
| 1954 { | |
| 1955 *refdbytesp = ds->ds_phys->ds_used_bytes; | |
| 1956 *availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE); | |
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1957 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) |
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1958 *availbytesp += ds->ds_reserved - ds->ds_phys->ds_unique_bytes; |
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1959 if (ds->ds_quota != 0) { |
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1960 /* |
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1961 * Adjust available bytes according to refquota |
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1962 */ |
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1963 if (*refdbytesp < ds->ds_quota) |
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1964 *availbytesp = MIN(*availbytesp, |
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1965 ds->ds_quota - *refdbytesp); |
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1966 else |
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1967 *availbytesp = 0; |
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1968 } |
| 2885 | 1969 *usedobjsp = ds->ds_phys->ds_bp.blk_fill; |
| 1970 *availobjsp = DN_MAX_OBJECT - *usedobjsp; | |
| 789 | 1971 } |
| 1972 | |
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1973 boolean_t |
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1974 dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds) |
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1975 { |
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1976 dsl_pool_t *dp = ds->ds_dir->dd_pool; |
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1977 |
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1978 ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || |
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1979 dsl_pool_sync_context(dp)); |
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1980 if (ds->ds_prev == NULL) |
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1981 return (B_FALSE); |
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1982 if (ds->ds_phys->ds_bp.blk_birth > |
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1983 ds->ds_prev->ds_phys->ds_creation_txg) |
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1984 return (B_TRUE); |
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1985 return (B_FALSE); |
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1986 } |
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1987 |
| 2199 | 1988 /* ARGSUSED */ |
| 789 | 1989 static int |
| 2199 | 1990 dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 789 | 1991 { |
| 2199 | 1992 dsl_dataset_t *ds = arg1; |
| 1993 char *newsnapname = arg2; | |
| 1994 dsl_dir_t *dd = ds->ds_dir; | |
| 1995 dsl_dataset_t *hds; | |
| 1996 uint64_t val; | |
| 789 | 1997 int err; |
| 1998 | |
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1999 err = dsl_dataset_hold_obj(dd->dd_pool, |
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2000 dd->dd_phys->dd_head_dataset_obj, FTAG, &hds); |
| 789 | 2001 if (err) |
| 2002 return (err); | |
| 2003 | |
| 2199 | 2004 /* new name better not be in use */ |
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2005 err = dsl_dataset_snap_lookup(hds, newsnapname, &val); |
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2006 dsl_dataset_rele(hds, FTAG); |
| 789 | 2007 |
| 2199 | 2008 if (err == 0) |
| 2009 err = EEXIST; | |
| 2010 else if (err == ENOENT) | |
| 2011 err = 0; | |
| 4007 | 2012 |
| 2013 /* dataset name + 1 for the "@" + the new snapshot name must fit */ | |
| 2014 if (dsl_dir_namelen(ds->ds_dir) + 1 + strlen(newsnapname) >= MAXNAMELEN) | |
| 2015 err = ENAMETOOLONG; | |
| 2016 | |
| 2199 | 2017 return (err); |
| 2018 } | |
| 789 | 2019 |
| 2199 | 2020 static void |
| 4543 | 2021 dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, |
| 2022 cred_t *cr, dmu_tx_t *tx) | |
| 2199 | 2023 { |
| 2024 dsl_dataset_t *ds = arg1; | |
| 4543 | 2025 const char *newsnapname = arg2; |
| 2199 | 2026 dsl_dir_t *dd = ds->ds_dir; |
| 2027 objset_t *mos = dd->dd_pool->dp_meta_objset; | |
| 2028 dsl_dataset_t *hds; | |
| 2029 int err; | |
| 789 | 2030 |
| 2199 | 2031 ASSERT(ds->ds_phys->ds_next_snap_obj != 0); |
| 789 | 2032 |
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2033 VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool, |
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2034 dd->dd_phys->dd_head_dataset_obj, FTAG, &hds)); |
| 789 | 2035 |
| 2199 | 2036 VERIFY(0 == dsl_dataset_get_snapname(ds)); |
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2037 err = dsl_dataset_snap_remove(hds, ds->ds_snapname, tx); |
| 789 | 2038 ASSERT3U(err, ==, 0); |
| 2199 | 2039 mutex_enter(&ds->ds_lock); |
| 2040 (void) strcpy(ds->ds_snapname, newsnapname); | |
| 2041 mutex_exit(&ds->ds_lock); | |
| 2042 err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj, | |
| 2043 ds->ds_snapname, 8, 1, &ds->ds_object, tx); | |
| 789 | 2044 ASSERT3U(err, ==, 0); |
| 2045 | |
| 4543 | 2046 spa_history_internal_log(LOG_DS_RENAME, dd->dd_pool->dp_spa, tx, |
| 2047 cr, "dataset = %llu", ds->ds_object); | |
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2048 dsl_dataset_rele(hds, FTAG); |
| 789 | 2049 } |
| 2050 | |
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2051 struct renamesnaparg { |
| 4007 | 2052 dsl_sync_task_group_t *dstg; |
| 2053 char failed[MAXPATHLEN]; | |
| 2054 char *oldsnap; | |
| 2055 char *newsnap; | |
| 2056 }; | |
| 2057 | |
| 2058 static int | |
| 2059 dsl_snapshot_rename_one(char *name, void *arg) | |
| 2060 { | |
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2061 struct renamesnaparg *ra = arg; |
| 4007 | 2062 dsl_dataset_t *ds = NULL; |
| 2063 char *cp; | |
| 2064 int err; | |
| 2065 | |
| 2066 cp = name + strlen(name); | |
| 2067 *cp = '@'; | |
| 2068 (void) strcpy(cp + 1, ra->oldsnap); | |
| 4543 | 2069 |
| 2070 /* | |
| 2071 * For recursive snapshot renames the parent won't be changing | |
| 2072 * so we just pass name for both the to/from argument. | |
| 2073 */ | |
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2074 err = zfs_secpolicy_rename_perms(name, name, CRED()); |
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2075 if (err == ENOENT) { |
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2076 return (0); |
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2077 } else if (err) { |
| 4543 | 2078 (void) strcpy(ra->failed, name); |
| 2079 return (err); | |
| 2080 } | |
| 2081 | |
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2082 #ifdef _KERNEL |
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2083 /* |
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2084 * For all filesystems undergoing rename, we'll need to unmount it. |
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2085 */ |
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2086 (void) zfs_unmount_snap(name, NULL); |
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2087 #endif |
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2088 err = dsl_dataset_hold(name, ra->dstg, &ds); |
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2089 *cp = '\0'; |
| 4007 | 2090 if (err == ENOENT) { |
| 2091 return (0); | |
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2092 } else if (err) { |
| 4007 | 2093 (void) strcpy(ra->failed, name); |
| 2094 return (err); | |
| 2095 } | |
| 2096 | |
| 2097 dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check, | |
| 2098 dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0); | |
| 2099 | |
| 2100 return (0); | |
| 2101 } | |
| 2102 | |
| 2103 static int | |
| 2104 dsl_recursive_rename(char *oldname, const char *newname) | |
| 2105 { | |
| 2106 int err; | |
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2107 struct renamesnaparg *ra; |
| 4007 | 2108 dsl_sync_task_t *dst; |
| 2109 spa_t *spa; | |
| 2110 char *cp, *fsname = spa_strdup(oldname); | |
| 2111 int len = strlen(oldname); | |
| 2112 | |
| 2113 /* truncate the snapshot name to get the fsname */ | |
| 2114 cp = strchr(fsname, '@'); | |
| 2115 *cp = '\0'; | |
| 2116 | |
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2117 err = spa_open(fsname, &spa, FTAG); |
| 4007 | 2118 if (err) { |
| 2119 kmem_free(fsname, len + 1); | |
| 2120 return (err); | |
| 2121 } | |
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2122 ra = kmem_alloc(sizeof (struct renamesnaparg), KM_SLEEP); |
| 4007 | 2123 ra->dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); |
| 2124 | |
| 2125 ra->oldsnap = strchr(oldname, '@') + 1; | |
| 2126 ra->newsnap = strchr(newname, '@') + 1; | |
| 2127 *ra->failed = '\0'; | |
| 2128 | |
| 2129 err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra, | |
| 2130 DS_FIND_CHILDREN); | |
| 2131 kmem_free(fsname, len + 1); | |
| 2132 | |
| 2133 if (err == 0) { | |
| 2134 err = dsl_sync_task_group_wait(ra->dstg); | |
| 2135 } | |
| 2136 | |
| 2137 for (dst = list_head(&ra->dstg->dstg_tasks); dst; | |
| 2138 dst = list_next(&ra->dstg->dstg_tasks, dst)) { | |
| 2139 dsl_dataset_t *ds = dst->dst_arg1; | |
| 2140 if (dst->dst_err) { | |
| 2141 dsl_dir_name(ds->ds_dir, ra->failed); | |
|
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|
2142 (void) strcat(ra->failed, "@"); |
|
1a9b4fbc0d2a
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|
2143 (void) strcat(ra->failed, ra->newsnap); |
| 4007 | 2144 } |
|
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|
2145 dsl_dataset_rele(ds, ra->dstg); |
| 4007 | 2146 } |
| 2147 | |
| 4543 | 2148 if (err) |
| 2149 (void) strcpy(oldname, ra->failed); | |
| 4007 | 2150 |
| 2151 dsl_sync_task_group_destroy(ra->dstg); | |
|
5326
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diff
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|
2152 kmem_free(ra, sizeof (struct renamesnaparg)); |
| 4007 | 2153 spa_close(spa, FTAG); |
| 2154 return (err); | |
| 2155 } | |
| 2156 | |
|
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|
2157 static int |
|
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|
2158 dsl_valid_rename(char *oldname, void *arg) |
|
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|
2159 { |
|
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|
2160 int delta = *(int *)arg; |
|
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|
2161 |
|
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|
2162 if (strlen(oldname) + delta >= MAXNAMELEN) |
|
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|
2163 return (ENAMETOOLONG); |
|
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|
2164 |
|
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|
2165 return (0); |
|
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|
2166 } |
|
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|
2167 |
| 789 | 2168 #pragma weak dmu_objset_rename = dsl_dataset_rename |
| 2169 int | |
|
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|
2170 dsl_dataset_rename(char *oldname, const char *newname, boolean_t recursive) |
| 789 | 2171 { |
| 2172 dsl_dir_t *dd; | |
| 2199 | 2173 dsl_dataset_t *ds; |
| 789 | 2174 const char *tail; |
| 2175 int err; | |
| 2176 | |
| 2199 | 2177 err = dsl_dir_open(oldname, FTAG, &dd, &tail); |
| 1544 | 2178 if (err) |
| 2179 return (err); | |
| 789 | 2180 if (tail == NULL) { |
|
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|
2181 int delta = strlen(newname) - strlen(oldname); |
|
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|
2182 |
|
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|
2183 /* if we're growing, validate child name lengths */ |
|
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|
2184 if (delta > 0) |
|
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|
2185 err = dmu_objset_find(oldname, dsl_valid_rename, |
|
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|
2186 &delta, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS); |
|
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|
2187 |
|
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|
2188 if (!err) |
|
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|
2189 err = dsl_dir_rename(dd, newname); |
| 789 | 2190 dsl_dir_close(dd, FTAG); |
| 2191 return (err); | |
| 2192 } | |
| 2193 if (tail[0] != '@') { | |
| 2194 /* the name ended in a nonexistant component */ | |
| 2195 dsl_dir_close(dd, FTAG); | |
| 2196 return (ENOENT); | |
| 2197 } | |
| 2198 | |
| 2199 | 2199 dsl_dir_close(dd, FTAG); |
| 2200 | |
| 2201 /* new name must be snapshot in same filesystem */ | |
| 2202 tail = strchr(newname, '@'); | |
| 2203 if (tail == NULL) | |
| 2204 return (EINVAL); | |
| 2205 tail++; | |
| 2206 if (strncmp(oldname, newname, tail - newname) != 0) | |
| 2207 return (EXDEV); | |
| 789 | 2208 |
| 4007 | 2209 if (recursive) { |
| 2210 err = dsl_recursive_rename(oldname, newname); | |
| 2211 } else { | |
|
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|
2212 err = dsl_dataset_hold(oldname, FTAG, &ds); |
| 4007 | 2213 if (err) |
| 2214 return (err); | |
| 2199 | 2215 |
| 4007 | 2216 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
| 2217 dsl_dataset_snapshot_rename_check, | |
| 2218 dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1); | |
| 2199 | 2219 |
|
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|
2220 dsl_dataset_rele(ds, FTAG); |
| 4007 | 2221 } |
| 2199 | 2222 |
| 789 | 2223 return (err); |
| 2224 } | |
| 2082 | 2225 |
|
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|
2226 struct promotenode { |
|
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|
2227 list_node_t link; |
|
47572a2f5e73
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|
2228 dsl_dataset_t *ds; |
|
47572a2f5e73
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|
2229 }; |
|
47572a2f5e73
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|
2230 |
| 2199 | 2231 struct promotearg { |
|
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|
2232 list_t snap_list; |
|
47572a2f5e73
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|
2233 dsl_dataset_t *clone_origin, *old_head; |
| 2199 | 2234 uint64_t used, comp, uncomp, unique; |
|
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|
2235 uint64_t newnext_obj; |
| 2199 | 2236 }; |
| 2237 | |
| 4543 | 2238 /* ARGSUSED */ |
| 2082 | 2239 static int |
| 2199 | 2240 dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx) |
| 2082 | 2241 { |
| 2199 | 2242 dsl_dataset_t *hds = arg1; |
| 2243 struct promotearg *pa = arg2; | |
|
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|
2244 struct promotenode *snap = list_head(&pa->snap_list); |
| 2199 | 2245 dsl_pool_t *dp = hds->ds_dir->dd_pool; |
|
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|
2246 dsl_dataset_t *origin_ds = snap->ds; |
|
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|
2247 dsl_dataset_t *newnext_ds; |
|
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|
2248 char *name; |
| 2199 | 2249 uint64_t itor = 0; |
| 2082 | 2250 blkptr_t bp; |
|
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|
2251 int err; |
| 2199 | 2252 |
|
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|
2253 /* Check that it is a real clone */ |
|
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|
2254 if (!dsl_dir_is_clone(hds->ds_dir)) |
| 2082 | 2255 return (EINVAL); |
| 2256 | |
| 2199 | 2257 /* Since this is so expensive, don't do the preliminary check */ |
| 2258 if (!dmu_tx_is_syncing(tx)) | |
| 2259 return (0); | |
| 2260 | |
|
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|
2261 if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE) |
|
47572a2f5e73
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|
2262 return (EXDEV); |
| 2082 | 2263 |
| 5367 | 2264 /* find origin's new next ds */ |
|
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|
2265 newnext_ds = hds; |
| 5367 | 2266 while (newnext_ds->ds_phys->ds_prev_snap_obj != origin_ds->ds_object) { |
| 2082 | 2267 dsl_dataset_t *prev; |
| 2268 | |
|
6689
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|
2269 err = dsl_dataset_hold_obj(dp, |
|
47572a2f5e73
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|
2270 newnext_ds->ds_phys->ds_prev_snap_obj, FTAG, &prev); |
|
47572a2f5e73
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|
2271 if (newnext_ds != hds) |
|
47572a2f5e73
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|
2272 dsl_dataset_rele(newnext_ds, FTAG); |
|
47572a2f5e73
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|
2273 if (err) |
|
47572a2f5e73
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|
2274 return (err); |
| 2082 | 2275 newnext_ds = prev; |
| 2276 } | |
| 2199 | 2277 pa->newnext_obj = newnext_ds->ds_object; |
| 2082 | 2278 |
| 5367 | 2279 /* compute origin's new unique space */ |
|
6689
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|
2280 pa->unique = 0; |
| 2082 | 2281 while ((err = bplist_iterate(&newnext_ds->ds_deadlist, |
| 2282 &itor, &bp)) == 0) { | |
| 5367 | 2283 if (bp.blk_birth > origin_ds->ds_phys->ds_prev_snap_txg) |
|
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|
2284 pa->unique += bp_get_dasize(dp->dp_spa, &bp); |
| 2082 | 2285 } |
|
6689
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|
2286 if (newnext_ds != hds) |
|
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|
2287 dsl_dataset_rele(newnext_ds, FTAG); |
| 2082 | 2288 if (err != ENOENT) |
|
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|
2289 return (err); |
|
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|
2290 |
| 2082 | 2291 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
|
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|
2292 |
|
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|
2293 /* |
|
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|
2294 * Walk the snapshots that we are moving |
|
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|
2295 * |
|
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|
2296 * Compute space to transfer. Each snapshot gave birth to: |
|
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|
2297 * (my used) - (prev's used) + (deadlist's used) |
|
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|
2298 * So a sequence would look like: |
|
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|
2299 * uN - u(N-1) + dN + ... + u1 - u0 + d1 + u0 - 0 + d0 |
|
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|
2300 * Which simplifies to: |
|
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|
2301 * uN + dN + ... + d1 + d0 |
|
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|
2302 * Note however, if we stop before we reach the ORIGIN we get: |
|
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|
2303 * uN + dN + ... + dM - uM-1 |
|
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|
2304 */ |
|
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|
2305 pa->used = origin_ds->ds_phys->ds_used_bytes; |
|
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|
2306 pa->comp = origin_ds->ds_phys->ds_compressed_bytes; |
|
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|
2307 pa->uncomp = origin_ds->ds_phys->ds_uncompressed_bytes; |
|
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|
2308 do { |
| 2082 | 2309 uint64_t val, dlused, dlcomp, dluncomp; |
|
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|
2310 dsl_dataset_t *ds = snap->ds; |
| 2082 | 2311 |
| 2312 /* Check that the snapshot name does not conflict */ | |
| 2313 dsl_dataset_name(ds, name); | |
|
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|
2314 err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); |
|
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|
2315 if (err == 0) |
|
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|
2316 err = EEXIST; |
|
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|
2317 if (err != ENOENT) |
| 2082 | 2318 break; |
|
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|
2319 err = 0; |
|
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|
2320 |
|
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|
2321 /* The very first snapshot does not have a deadlist */ |
|
47572a2f5e73
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|
2322 if (ds->ds_phys->ds_prev_snap_obj != 0) { |
|
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|
2323 if (err = bplist_space(&ds->ds_deadlist, |
|
47572a2f5e73
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|
2324 &dlused, &dlcomp, &dluncomp)) |
|
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2325 break; |
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|
2326 pa->used += dlused; |
|
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2327 pa->comp += dlcomp; |
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|
2328 pa->uncomp += dluncomp; |
| 2082 | 2329 } |
|
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2330 } while (snap = list_next(&pa->snap_list, snap)); |
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2331 |
|
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|
2332 /* |
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|
2333 * If we are a clone of a clone then we never reached ORIGIN, |
|
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2334 * so we need to subtract out the clone origin's used space. |
|
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2335 */ |
|
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|
2336 if (pa->clone_origin) { |
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2337 pa->used -= pa->clone_origin->ds_phys->ds_used_bytes; |
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2338 pa->comp -= pa->clone_origin->ds_phys->ds_compressed_bytes; |
|
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|
2339 pa->uncomp -= pa->clone_origin->ds_phys->ds_uncompressed_bytes; |
| 2082 | 2340 } |
| 2341 | |
|
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|
2342 kmem_free(name, MAXPATHLEN); |
|
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2343 |
| 2082 | 2344 /* Check that there is enough space here */ |
|
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2345 if (err == 0) { |
|
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2346 dsl_dir_t *odd = origin_ds->ds_dir; |
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|
2347 err = dsl_dir_transfer_possible(odd, hds->ds_dir, pa->used); |
|
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|
2348 } |
|
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|
2349 |
| 2199 | 2350 return (err); |
| 2351 } | |
| 2082 | 2352 |
| 2199 | 2353 static void |
| 4543 | 2354 dsl_dataset_promote_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
| 2199 | 2355 { |
| 2356 dsl_dataset_t *hds = arg1; | |
| 2357 struct promotearg *pa = arg2; | |
|
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2358 struct promotenode *snap = list_head(&pa->snap_list); |
|
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2359 dsl_dataset_t *origin_ds = snap->ds; |
| 2199 | 2360 dsl_dir_t *dd = hds->ds_dir; |
| 2361 dsl_pool_t *dp = hds->ds_dir->dd_pool; | |
| 5367 | 2362 dsl_dir_t *odd = NULL; |
| 2199 | 2363 char *name; |
|
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2364 uint64_t oldnext_obj; |
| 2199 | 2365 |
| 2366 ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)); | |
| 2367 | |
| 2417 | 2368 /* |
| 5367 | 2369 * We need to explicitly open odd, since origin_ds's dd will be |
| 2417 | 2370 * changing. |
| 2371 */ | |
| 5367 | 2372 VERIFY(0 == dsl_dir_open_obj(dp, origin_ds->ds_dir->dd_object, |
| 2373 NULL, FTAG, &odd)); | |
| 2082 | 2374 |
|
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|
2375 /* change origin's next snap */ |
|
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|
2376 dmu_buf_will_dirty(origin_ds->ds_dbuf, tx); |
|
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2377 oldnext_obj = origin_ds->ds_phys->ds_next_snap_obj; |
|
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|
2378 origin_ds->ds_phys->ds_next_snap_obj = pa->newnext_obj; |
|
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|
2379 |
|
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|
2380 /* change the origin's next clone */ |
|
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|
2381 if (origin_ds->ds_phys->ds_next_clones_obj) { |
|
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2382 VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset, |
|
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|
2383 origin_ds->ds_phys->ds_next_clones_obj, |
|
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|
2384 pa->newnext_obj, tx)); |
|
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|
2385 VERIFY3U(0, ==, zap_add_int(dp->dp_meta_objset, |
|
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|
2386 origin_ds->ds_phys->ds_next_clones_obj, |
|
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|
2387 oldnext_obj, tx)); |
|
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|
2388 } |
|
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|
2389 |
|
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|
2390 /* change origin */ |
|
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|
2391 dmu_buf_will_dirty(dd->dd_dbuf, tx); |
|
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|
2392 ASSERT3U(dd->dd_phys->dd_origin_obj, ==, origin_ds->ds_object); |
|
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|
2393 dd->dd_phys->dd_origin_obj = odd->dd_phys->dd_origin_obj; |
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|
2394 dmu_buf_will_dirty(odd->dd_dbuf, tx); |
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|
2395 odd->dd_phys->dd_origin_obj = origin_ds->ds_object; |
|
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|
2396 |
| 2082 | 2397 /* move snapshots to this dir */ |
| 2199 | 2398 name = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
|
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|
2399 do { |
|
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|
2400 dsl_dataset_t *ds = snap->ds; |
| 2082 | 2401 |
|
7237
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|
2402 /* unregister props as dsl_dir is changing */ |
|
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|
2403 if (ds->ds_user_ptr) { |
|
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|
2404 ds->ds_user_evict_func(ds, ds->ds_user_ptr); |
|
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|
2405 ds->ds_user_ptr = NULL; |
|
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|
2406 } |
| 2082 | 2407 /* move snap name entry */ |
| 2408 dsl_dataset_name(ds, name); | |
|
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|
2409 VERIFY(0 == dsl_dataset_snap_remove(pa->old_head, |
|
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|
2410 ds->ds_snapname, tx)); |
| 2199 | 2411 VERIFY(0 == zap_add(dp->dp_meta_objset, |
| 2082 | 2412 hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname, |
| 2413 8, 1, &ds->ds_object, tx)); | |
| 2414 /* change containing dsl_dir */ | |
| 2415 dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
| 5367 | 2416 ASSERT3U(ds->ds_phys->ds_dir_obj, ==, odd->dd_object); |
| 2082 | 2417 ds->ds_phys->ds_dir_obj = dd->dd_object; |
| 5367 | 2418 ASSERT3P(ds->ds_dir, ==, odd); |
| 2082 | 2419 dsl_dir_close(ds->ds_dir, ds); |
| 2199 | 2420 VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, |
| 2082 | 2421 NULL, ds, &ds->ds_dir)); |
| 2422 | |
| 2423 ASSERT3U(dsl_prop_numcb(ds), ==, 0); | |
|
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|
2424 } while (snap = list_next(&pa->snap_list, snap)); |
| 2082 | 2425 |
| 2426 /* change space accounting */ | |
| 5367 | 2427 dsl_dir_diduse_space(odd, -pa->used, -pa->comp, -pa->uncomp, tx); |
| 2199 | 2428 dsl_dir_diduse_space(dd, pa->used, pa->comp, pa->uncomp, tx); |
| 5367 | 2429 origin_ds->ds_phys->ds_unique_bytes = pa->unique; |
| 2082 | 2430 |
| 4543 | 2431 /* log history record */ |
| 2432 spa_history_internal_log(LOG_DS_PROMOTE, dd->dd_pool->dp_spa, tx, | |
|
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|
2433 cr, "dataset = %llu", hds->ds_object); |
| 4543 | 2434 |
| 5367 | 2435 dsl_dir_close(odd, FTAG); |
| 2199 | 2436 kmem_free(name, MAXPATHLEN); |
| 2082 | 2437 } |
| 2438 | |
| 2439 int | |
| 2440 dsl_dataset_promote(const char *name) | |
| 2441 { | |
| 2442 dsl_dataset_t *ds; | |
|
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|
2443 dsl_dir_t *dd; |
|
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|
2444 dsl_pool_t *dp; |
| 2082 | 2445 dmu_object_info_t doi; |
| 2199 | 2446 struct promotearg pa; |
|
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|
2447 struct promotenode *snap; |
|
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|
2448 uint64_t snap_obj; |
|
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|
2449 uint64_t last_snap = 0; |
|
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|
2450 int err; |
|
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|
2451 |
|
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|
2452 err = dsl_dataset_hold(name, FTAG, &ds); |
| 2082 | 2453 if (err) |
| 2454 return (err); | |
|
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|
2455 dd = ds->ds_dir; |
|
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|
2456 dp = dd->dd_pool; |
|
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|
2457 |
|
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|
2458 err = dmu_object_info(dp->dp_meta_objset, |
| 2082 | 2459 ds->ds_phys->ds_snapnames_zapobj, &doi); |
| 2460 if (err) { | |
|
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|
2461 dsl_dataset_rele(ds, FTAG); |
| 2082 | 2462 return (err); |
| 2463 } | |
| 2464 | |
| 2465 /* | |
|
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|
2466 * We are going to inherit all the snapshots taken before our |
|
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|
2467 * origin (i.e., our new origin will be our parent's origin). |
|
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|
2468 * Take ownership of them so that we can rename them into our |
|
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|
2469 * namespace. |
|
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|
2470 */ |
|
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|
2471 pa.clone_origin = NULL; |
|
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|
2472 list_create(&pa.snap_list, |
|
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|
2473 sizeof (struct promotenode), offsetof(struct promotenode, link)); |
|
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|
2474 rw_enter(&dp->dp_config_rwlock, RW_READER); |
|
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|
2475 ASSERT(dd->dd_phys->dd_origin_obj != 0); |
|
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|
2476 snap_obj = dd->dd_phys->dd_origin_obj; |
|
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|
2477 while (snap_obj) { |
|
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|
2478 dsl_dataset_t *snapds; |
|
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|
2479 |
|
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|
2480 /* |
|
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|
2481 * NB: this would be handled by the below check for |
|
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|
2482 * clone of a clone, but then we'd always own_obj() the |
|
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|
2483 * $ORIGIN, thus causing unnecessary EBUSYs. We don't |
|
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|
2484 * need to set pa.clone_origin because the $ORIGIN has |
|
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|
2485 * no data to account for. |
|
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|
2486 */ |
|
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|
2487 if (dp->dp_origin_snap && |
|
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|
2488 snap_obj == dp->dp_origin_snap->ds_object) |
|
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diff
changeset
|
2489 break; |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2490 |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2491 err = dsl_dataset_own_obj(dp, snap_obj, 0, FTAG, &snapds); |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2492 if (err == ENOENT) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2493 /* lost race with snapshot destroy */ |
|
7046
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2494 struct promotenode *last = list_tail(&pa.snap_list); |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2495 ASSERT(snap_obj != last->ds->ds_phys->ds_prev_snap_obj); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2496 snap_obj = last->ds->ds_phys->ds_prev_snap_obj; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2497 continue; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2498 } else if (err) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2499 rw_exit(&dp->dp_config_rwlock); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2500 goto out; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2501 } |
|
7046
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2502 |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2503 /* |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2504 * We could be a clone of a clone. If we reach our |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2505 * parent's branch point, we're done. |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2506 */ |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2507 if (last_snap && |
|
7046
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2508 snapds->ds_phys->ds_next_snap_obj != last_snap) { |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2509 pa.clone_origin = snapds; |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2510 break; |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2511 } |
|
7046
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2512 |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2513 snap = kmem_alloc(sizeof (struct promotenode), KM_SLEEP); |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2514 snap->ds = snapds; |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2515 list_insert_tail(&pa.snap_list, snap); |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2516 last_snap = snap_obj; |
|
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2517 snap_obj = snap->ds->ds_phys->ds_prev_snap_obj; |
|
7385
f69ff8507427
6727817 ZFS assertion failure (zero length arc_buf_alloc) during NFS I/O
Mark Maybee <Mark.Maybee@Sun.COM>
parents:
7312
diff
changeset
|
2518 dsl_dataset_make_exclusive(snapds, FTAG); |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2519 } |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2520 snap = list_head(&pa.snap_list); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2521 ASSERT(snap != NULL); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2522 err = dsl_dataset_hold_obj(dp, |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2523 snap->ds->ds_dir->dd_phys->dd_head_dataset_obj, FTAG, &pa.old_head); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2524 rw_exit(&dp->dp_config_rwlock); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2525 |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2526 if (err) |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2527 goto out; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2528 |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2529 /* |
| 2082 | 2530 * Add in 128x the snapnames zapobj size, since we will be moving |
| 2531 * a bunch of snapnames to the promoted ds, and dirtying their | |
| 2532 * bonus buffers. | |
| 2533 */ | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2534 err = dsl_sync_task_do(dp, dsl_dataset_promote_check, |
| 2199 | 2535 dsl_dataset_promote_sync, ds, &pa, 2 + 2 * doi.doi_physical_blks); |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2536 |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2537 dsl_dataset_rele(pa.old_head, FTAG); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2538 out: |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2539 while ((snap = list_tail(&pa.snap_list)) != NULL) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2540 list_remove(&pa.snap_list, snap); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2541 dsl_dataset_disown(snap->ds, FTAG); |
|
7046
361307ae060d
6343667 scrub/resilver has to start over when a snapshot is taken
ahrens
parents:
6992
diff
changeset
|
2542 kmem_free(snap, sizeof (struct promotenode)); |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2543 } |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2544 list_destroy(&pa.snap_list); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2545 if (pa.clone_origin) |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2546 dsl_dataset_disown(pa.clone_origin, FTAG); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2547 dsl_dataset_rele(ds, FTAG); |
| 2082 | 2548 return (err); |
| 2549 } | |
| 3912 | 2550 |
| 5367 | 2551 struct cloneswaparg { |
| 2552 dsl_dataset_t *cds; /* clone dataset */ | |
| 2553 dsl_dataset_t *ohds; /* origin's head dataset */ | |
| 2554 boolean_t force; | |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2555 int64_t unused_refres_delta; /* change in unconsumed refreservation */ |
| 5367 | 2556 }; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2557 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2558 /* ARGSUSED */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2559 static int |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2560 dsl_dataset_clone_swap_check(void *arg1, void *arg2, dmu_tx_t *tx) |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2561 { |
| 5367 | 2562 struct cloneswaparg *csa = arg1; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2563 |
| 5367 | 2564 /* they should both be heads */ |
| 2565 if (dsl_dataset_is_snapshot(csa->cds) || | |
| 2566 dsl_dataset_is_snapshot(csa->ohds)) | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2567 return (EINVAL); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2568 |
| 5367 | 2569 /* the branch point should be just before them */ |
| 2570 if (csa->cds->ds_prev != csa->ohds->ds_prev) | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2571 return (EINVAL); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2572 |
| 5367 | 2573 /* cds should be the clone */ |
| 2574 if (csa->cds->ds_prev->ds_phys->ds_next_snap_obj != | |
| 2575 csa->ohds->ds_object) | |
| 2576 return (EINVAL); | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2577 |
| 5367 | 2578 /* the clone should be a child of the origin */ |
| 2579 if (csa->cds->ds_dir->dd_parent != csa->ohds->ds_dir) | |
| 2580 return (EINVAL); | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2581 |
| 5367 | 2582 /* ohds shouldn't be modified unless 'force' */ |
| 2583 if (!csa->force && dsl_dataset_modified_since_lastsnap(csa->ohds)) | |
| 2584 return (ETXTBSY); | |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2585 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2586 /* adjust amount of any unconsumed refreservation */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2587 csa->unused_refres_delta = |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2588 (int64_t)MIN(csa->ohds->ds_reserved, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2589 csa->ohds->ds_phys->ds_unique_bytes) - |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2590 (int64_t)MIN(csa->ohds->ds_reserved, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2591 csa->cds->ds_phys->ds_unique_bytes); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2592 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2593 if (csa->unused_refres_delta > 0 && |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2594 csa->unused_refres_delta > |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2595 dsl_dir_space_available(csa->ohds->ds_dir, NULL, 0, TRUE)) |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2596 return (ENOSPC); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2597 |
| 5367 | 2598 return (0); |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2599 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2600 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2601 /* ARGSUSED */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2602 static void |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2603 dsl_dataset_clone_swap_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2604 { |
| 5367 | 2605 struct cloneswaparg *csa = arg1; |
| 2606 dsl_pool_t *dp = csa->cds->ds_dir->dd_pool; | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2607 uint64_t itor = 0; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2608 blkptr_t bp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2609 uint64_t unique = 0; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2610 int err; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2611 |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2612 ASSERT(csa->cds->ds_reserved == 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2613 ASSERT(csa->cds->ds_quota == csa->ohds->ds_quota); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2614 |
| 5367 | 2615 dmu_buf_will_dirty(csa->cds->ds_dbuf, tx); |
| 2616 dmu_buf_will_dirty(csa->ohds->ds_dbuf, tx); | |
| 2617 dmu_buf_will_dirty(csa->cds->ds_prev->ds_dbuf, tx); | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2618 |
| 5367 | 2619 if (csa->cds->ds_user_ptr != NULL) { |
| 2620 csa->cds->ds_user_evict_func(csa->cds, csa->cds->ds_user_ptr); | |
| 2621 csa->cds->ds_user_ptr = NULL; | |
| 2622 } | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2623 |
| 5367 | 2624 if (csa->ohds->ds_user_ptr != NULL) { |
| 2625 csa->ohds->ds_user_evict_func(csa->ohds, | |
| 2626 csa->ohds->ds_user_ptr); | |
| 2627 csa->ohds->ds_user_ptr = NULL; | |
| 2628 } | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2629 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2630 /* compute unique space */ |
| 5367 | 2631 while ((err = bplist_iterate(&csa->cds->ds_deadlist, |
| 2632 &itor, &bp)) == 0) { | |
| 2633 if (bp.blk_birth > csa->cds->ds_prev->ds_phys->ds_prev_snap_txg) | |
| 2634 unique += bp_get_dasize(dp->dp_spa, &bp); | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2635 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2636 VERIFY(err == ENOENT); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2637 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2638 /* reset origin's unique bytes */ |
| 5367 | 2639 csa->cds->ds_prev->ds_phys->ds_unique_bytes = unique; |
|
5326
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ek110237
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diff
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|
2640 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
2641 /* swap blkptrs */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2642 { |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
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|
2643 blkptr_t tmp; |
| 5367 | 2644 tmp = csa->ohds->ds_phys->ds_bp; |
| 2645 csa->ohds->ds_phys->ds_bp = csa->cds->ds_phys->ds_bp; | |
| 2646 csa->cds->ds_phys->ds_bp = tmp; | |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
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diff
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|
2647 } |
|
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6425096 want online 'zfs recv' (read only and read/write)
ek110237
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diff
changeset
|
2648 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2649 /* set dd_*_bytes */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
changeset
|
2650 { |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
2651 int64_t dused, dcomp, duncomp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
changeset
|
2652 uint64_t cdl_used, cdl_comp, cdl_uncomp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
changeset
|
2653 uint64_t odl_used, odl_comp, odl_uncomp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
changeset
|
2654 |
| 5367 | 2655 VERIFY(0 == bplist_space(&csa->cds->ds_deadlist, &cdl_used, |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5094
diff
changeset
|
2656 &cdl_comp, &cdl_uncomp)); |
| 5367 | 2657 VERIFY(0 == bplist_space(&csa->ohds->ds_deadlist, &odl_used, |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
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parents:
5094
diff
changeset
|
2658 &odl_comp, &odl_uncomp)); |
| 5367 | 2659 dused = csa->cds->ds_phys->ds_used_bytes + cdl_used - |
| 2660 (csa->ohds->ds_phys->ds_used_bytes + odl_used); | |
| 2661 dcomp = csa->cds->ds_phys->ds_compressed_bytes + cdl_comp - | |
| 2662 (csa->ohds->ds_phys->ds_compressed_bytes + odl_comp); | |
| 2663 duncomp = csa->cds->ds_phys->ds_uncompressed_bytes + | |
| 2664 cdl_uncomp - | |
| 2665 (csa->ohds->ds_phys->ds_uncompressed_bytes + odl_uncomp); | |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
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diff
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|
2666 |
| 5367 | 2667 dsl_dir_diduse_space(csa->ohds->ds_dir, |
| 2668 dused, dcomp, duncomp, tx); | |
| 2669 dsl_dir_diduse_space(csa->cds->ds_dir, | |
| 2670 -dused, -dcomp, -duncomp, tx); | |
| 2671 } | |
| 2672 | |
| 2673 #define SWITCH64(x, y) \ | |
| 2674 { \ | |
| 2675 uint64_t __tmp = (x); \ | |
| 2676 (x) = (y); \ | |
| 2677 (y) = __tmp; \ | |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
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diff
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|
2678 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
changeset
|
2679 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
changeset
|
2680 /* swap ds_*_bytes */ |
| 5367 | 2681 SWITCH64(csa->ohds->ds_phys->ds_used_bytes, |
| 2682 csa->cds->ds_phys->ds_used_bytes); | |
| 2683 SWITCH64(csa->ohds->ds_phys->ds_compressed_bytes, | |
| 2684 csa->cds->ds_phys->ds_compressed_bytes); | |
| 2685 SWITCH64(csa->ohds->ds_phys->ds_uncompressed_bytes, | |
| 2686 csa->cds->ds_phys->ds_uncompressed_bytes); | |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2687 SWITCH64(csa->ohds->ds_phys->ds_unique_bytes, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2688 csa->cds->ds_phys->ds_unique_bytes); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2689 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2690 /* apply any parent delta for change in unconsumed refreservation */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2691 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
|
2692 0, 0, tx); |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
ek110237
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diff
changeset
|
2693 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
changeset
|
2694 /* swap deadlists */ |
| 5367 | 2695 bplist_close(&csa->cds->ds_deadlist); |
| 2696 bplist_close(&csa->ohds->ds_deadlist); | |
| 2697 SWITCH64(csa->ohds->ds_phys->ds_deadlist_obj, | |
| 2698 csa->cds->ds_phys->ds_deadlist_obj); | |
| 2699 VERIFY(0 == bplist_open(&csa->cds->ds_deadlist, dp->dp_meta_objset, | |
| 2700 csa->cds->ds_phys->ds_deadlist_obj)); | |
| 2701 VERIFY(0 == bplist_open(&csa->ohds->ds_deadlist, dp->dp_meta_objset, | |
| 2702 csa->ohds->ds_phys->ds_deadlist_obj)); | |
|
5326
6752aa2bd5bc
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ek110237
parents:
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diff
changeset
|
2703 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
changeset
|
2704 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
changeset
|
2705 /* |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2706 * Swap 'clone' with its origin head file system. Used at the end |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2707 * of "online recv" to swizzle the file system to the new version. |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
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diff
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|
2708 */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
2709 int |
| 5367 | 2710 dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, |
| 2711 boolean_t force) | |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
2712 { |
| 5367 | 2713 struct cloneswaparg csa; |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2714 int error; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2715 |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2716 ASSERT(clone->ds_owner); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2717 ASSERT(origin_head->ds_owner); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2718 retry: |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2719 /* Need exclusive access for the swap */ |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2720 rw_enter(&clone->ds_rwlock, RW_WRITER); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2721 if (!rw_tryenter(&origin_head->ds_rwlock, RW_WRITER)) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2722 rw_exit(&clone->ds_rwlock); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2723 rw_enter(&origin_head->ds_rwlock, RW_WRITER); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2724 if (!rw_tryenter(&clone->ds_rwlock, RW_WRITER)) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2725 rw_exit(&origin_head->ds_rwlock); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2726 goto retry; |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2727 } |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2728 } |
| 5367 | 2729 csa.cds = clone; |
| 2730 csa.ohds = origin_head; | |
| 2731 csa.force = force; | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2732 error = dsl_sync_task_do(clone->ds_dir->dd_pool, |
|
5326
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|
2733 dsl_dataset_clone_swap_check, |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2734 dsl_dataset_clone_swap_sync, &csa, NULL, 9); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2735 return (error); |
|
5326
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6425096 want online 'zfs recv' (read only and read/write)
ek110237
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diff
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|
2736 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
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diff
changeset
|
2737 |
| 3912 | 2738 /* |
| 2739 * Given a pool name and a dataset object number in that pool, | |
| 2740 * return the name of that dataset. | |
| 2741 */ | |
| 2742 int | |
| 2743 dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf) | |
| 2744 { | |
| 2745 spa_t *spa; | |
| 2746 dsl_pool_t *dp; | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2747 dsl_dataset_t *ds; |
| 3912 | 2748 int error; |
| 2749 | |
| 2750 if ((error = spa_open(pname, &spa, FTAG)) != 0) | |
| 2751 return (error); | |
| 2752 dp = spa_get_dsl(spa); | |
| 2753 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2754 if ((error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds)) == 0) { |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2755 dsl_dataset_name(ds, buf); |
|
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2756 dsl_dataset_rele(ds, FTAG); |
| 3912 | 2757 } |
| 2758 rw_exit(&dp->dp_config_rwlock); | |
| 2759 spa_close(spa, FTAG); | |
| 2760 | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2761 return (error); |
| 3912 | 2762 } |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2763 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2764 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2765 dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2766 uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv) |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
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|
2767 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2768 int error = 0; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2769 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2770 ASSERT3S(asize, >, 0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2771 |
|
5831
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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5712
diff
changeset
|
2772 /* |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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5712
diff
changeset
|
2773 * *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
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5712
diff
changeset
|
2774 * unconsumed refreservation space. |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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5712
diff
changeset
|
2775 */ |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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diff
changeset
|
2776 *ref_rsrv = 0; |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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5712
diff
changeset
|
2777 |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2778 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2779 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2780 * Make a space adjustment for reserved bytes. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2781 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2782 if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2783 ASSERT3U(*used, >=, |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2784 ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2785 *used -= (ds->ds_reserved - ds->ds_phys->ds_unique_bytes); |
|
5831
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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5712
diff
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|
2786 *ref_rsrv = |
|
48655d6b290b
6630761 In sub-filesystem, available space is less than refreservation space
ck153898
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5712
diff
changeset
|
2787 asize - MIN(asize, parent_delta(ds, asize + inflight)); |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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diff
changeset
|
2788 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2789 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2790 if (!check_quota || ds->ds_quota == 0) { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2791 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2792 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2793 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2794 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2795 * 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
|
2796 * is over quota, they get to try again unless the actual |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2797 * 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
|
2798 * may free up space for us). |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
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5367
diff
changeset
|
2799 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2800 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
|
2801 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
|
2802 error = ERESTART; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2803 else |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2804 error = EDQUOT; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2805 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2806 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2807 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2808 return (error); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2809 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2810 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2811 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2812 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2813 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
|
2814 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2815 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2816 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2817 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2818 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2819 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
|
2820 return (ENOTSUP); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2821 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2822 if (new_quota == 0) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2823 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2824 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2825 if (new_quota < ds->ds_phys->ds_used_bytes || |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2826 new_quota < ds->ds_reserved) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2827 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2828 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2829 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2830 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2831 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2832 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2833 void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2834 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
|
2835 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2836 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2837 uint64_t *quotap = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2838 uint64_t new_quota = *quotap; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2839 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2840 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2841 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2842 ds->ds_quota = new_quota; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2843 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2844 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
|
2845 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2846 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
|
2847 tx, cr, "%lld dataset = %llu ", |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2848 (longlong_t)new_quota, ds->ds_object); |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2849 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2850 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2851 int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2852 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
|
2853 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2854 dsl_dataset_t *ds; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2855 int err; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2856 |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2857 err = dsl_dataset_hold(dsname, FTAG, &ds); |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2858 if (err) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2859 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2860 |
|
5481
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2861 if (quota != ds->ds_quota) { |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2862 /* |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2863 * 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
|
2864 * want to make sure the file freeing takes effect. |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2865 */ |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2866 txg_wait_open(ds->ds_dir->dd_pool, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2867 |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2868 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2869 dsl_dataset_set_quota_check, dsl_dataset_set_quota_sync, |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2870 ds, "a, 0); |
|
1364fb7de75d
6619182 new non-sparse zvols should get refreservations
ck153898
parents:
5475
diff
changeset
|
2871 } |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6643
diff
changeset
|
2872 dsl_dataset_rele(ds, FTAG); |
|
5378
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2873 return (err); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2874 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2875 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2876 static int |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2877 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
|
2878 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2879 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2880 uint64_t *reservationp = arg2; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2881 uint64_t new_reservation = *reservationp; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2882 int64_t delta; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2883 uint64_t unique; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2884 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2885 if (new_reservation > INT64_MAX) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2886 return (EOVERFLOW); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2887 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2888 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
|
2889 SPA_VERSION_REFRESERVATION) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2890 return (ENOTSUP); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2891 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2892 if (dsl_dataset_is_snapshot(ds)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2893 return (EINVAL); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2894 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2895 /* |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2896 * 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
|
2897 * space estimates may be inaccurate. |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2898 */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2899 if (!dmu_tx_is_syncing(tx)) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2900 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2901 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2902 mutex_enter(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2903 unique = dsl_dataset_unique(ds); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2904 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
|
2905 mutex_exit(&ds->ds_lock); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2906 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2907 if (delta > 0 && |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2908 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
|
2909 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2910 if (delta > 0 && ds->ds_quota > 0 && |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2911 new_reservation > ds->ds_quota) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2912 return (ENOSPC); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2913 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2914 return (0); |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2915 } |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2916 |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2917 /* ARGSUSED */ |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2918 static void |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2919 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
|
2920 dmu_tx_t *tx) |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2921 { |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2922 dsl_dataset_t *ds = arg1; |
|
111aa1baa84a
PSARC 2007/555 zfs fs-only quotas and reservations
ck153898
parents:
5367
diff
changeset
|
2923 uint64_t *reservationp = arg2; |
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2924 uint64_t new_reservation = *reservationp; |
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2925 uint64_t unique; |
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2926 int64_t delta; |
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2927 |
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2928 dmu_buf_will_dirty(ds->ds_dbuf, tx); |
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2929 |
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2930 mutex_enter(&ds->ds_lock); |
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2931 unique = dsl_dataset_unique(ds); |
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2932 delta = MAX(0, (int64_t)(new_reservation - unique)) - |
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2933 MAX(0, (int64_t)(ds->ds_reserved - unique)); |
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2934 ds->ds_reserved = new_reservation; |
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2935 mutex_exit(&ds->ds_lock); |
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2936 |
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2937 dsl_prop_set_uint64_sync(ds->ds_dir, "refreservation", |
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2938 new_reservation, cr, tx); |
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2939 |
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2940 dsl_dir_diduse_space(ds->ds_dir, delta, 0, 0, tx); |
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2941 |
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2942 spa_history_internal_log(LOG_DS_REFRESERV, |
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2943 ds->ds_dir->dd_pool->dp_spa, tx, cr, "%lld dataset = %llu", |
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2944 (longlong_t)new_reservation, |
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2945 ds->ds_dir->dd_phys->dd_head_dataset_obj); |
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2946 } |
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2947 |
|
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2948 int |
|
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2949 dsl_dataset_set_reservation(const char *dsname, uint64_t reservation) |
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2950 { |
|
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2951 dsl_dataset_t *ds; |
|
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2952 int err; |
|
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2953 |
|
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47572a2f5e73
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|
2954 err = dsl_dataset_hold(dsname, FTAG, &ds); |
|
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2955 if (err) |
|
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2956 return (err); |
|
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|
2957 |
|
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2958 err = dsl_sync_task_do(ds->ds_dir->dd_pool, |
|
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2959 dsl_dataset_set_reservation_check, |
|
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|
2960 dsl_dataset_set_reservation_sync, ds, &reservation, 0); |
|
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|
2961 dsl_dataset_rele(ds, FTAG); |
|
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|
2962 return (err); |
|
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2963 } |