1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 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 /* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2011, 2017 by Delphix. All rights reserved. 24 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 25 * Copyright (c) 2013 Steven Hartland. All rights reserved. 26 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 27 * Copyright (c) 2014 Integros [integros.com] 28 */ 29 30 #ifndef _SYS_DSL_DATASET_H 31 #define _SYS_DSL_DATASET_H 32 33 #include <sys/dmu.h> 34 #include <sys/spa.h> 35 #include <sys/txg.h> 36 #include <sys/zio.h> 37 #include <sys/bplist.h> 38 #include <sys/dsl_synctask.h> 39 #include <sys/zfs_context.h> 40 #include <sys/dsl_deadlist.h> 41 #include <sys/refcount.h> 42 #include <sys/rrwlock.h> 43 #include <sys/dsl_crypt.h> 44 #include <zfeature_common.h> 45 46 #ifdef __cplusplus 47 extern "C" { 48 #endif 49 50 struct dsl_dataset; 51 struct dsl_dir; 52 struct dsl_pool; 53 struct dsl_crypto_params; 54 struct dsl_key_mapping; 55 56 #define DS_FLAG_INCONSISTENT (1ULL<<0) 57 #define DS_IS_INCONSISTENT(ds) \ 58 (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT) 59 60 /* 61 * Do not allow this dataset to be promoted. 62 */ 63 #define DS_FLAG_NOPROMOTE (1ULL<<1) 64 65 /* 66 * DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly 67 * calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE, 68 * refquota/refreservations). 69 */ 70 #define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2) 71 72 /* 73 * DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called 74 * on a dataset. This allows the dataset to be destroyed using 'zfs release'. 75 */ 76 #define DS_FLAG_DEFER_DESTROY (1ULL<<3) 77 #define DS_IS_DEFER_DESTROY(ds) \ 78 (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_DEFER_DESTROY) 79 80 /* 81 * DS_FIELD_* are strings that are used in the "extensified" dataset zap object. 82 * They should be of the format <reverse-dns>:<field>. 83 */ 84 85 /* 86 * This field's value is the object ID of a zap object which contains the 87 * bookmarks of this dataset. If it is present, then this dataset is counted 88 * in the refcount of the SPA_FEATURES_BOOKMARKS feature. 89 */ 90 #define DS_FIELD_BOOKMARK_NAMES "com.delphix:bookmarks" 91 92 /* 93 * This field is present (with value=0) if this dataset may contain large 94 * dnodes (>512B). If it is present, then this dataset is counted in the 95 * refcount of the SPA_FEATURE_LARGE_DNODE feature. 96 */ 97 #define DS_FIELD_LARGE_DNODE "org.zfsonlinux:large_dnode" 98 99 /* 100 * These fields are set on datasets that are in the middle of a resumable 101 * receive, and allow the sender to resume the send if it is interrupted. 102 */ 103 #define DS_FIELD_RESUME_FROMGUID "com.delphix:resume_fromguid" 104 #define DS_FIELD_RESUME_TONAME "com.delphix:resume_toname" 105 #define DS_FIELD_RESUME_TOGUID "com.delphix:resume_toguid" 106 #define DS_FIELD_RESUME_OBJECT "com.delphix:resume_object" 107 #define DS_FIELD_RESUME_OFFSET "com.delphix:resume_offset" 108 #define DS_FIELD_RESUME_BYTES "com.delphix:resume_bytes" 109 #define DS_FIELD_RESUME_LARGEBLOCK "com.delphix:resume_largeblockok" 110 #define DS_FIELD_RESUME_EMBEDOK "com.delphix:resume_embedok" 111 #define DS_FIELD_RESUME_COMPRESSOK "com.delphix:resume_compressok" 112 #define DS_FIELD_RESUME_RAWOK "com.datto:resume_rawok" 113 114 /* 115 * This field is set to the object number of the remap deadlist if one exists. 116 */ 117 #define DS_FIELD_REMAP_DEADLIST "com.delphix:remap_deadlist" 118 119 /* 120 * This field is set to the ivset guid for encrypted snapshots. This is used 121 * for validating raw receives. 122 */ 123 #define DS_FIELD_IVSET_GUID "com.datto:ivset_guid" 124 125 /* 126 * DS_FLAG_CI_DATASET is set if the dataset contains a file system whose 127 * name lookups should be performed case-insensitively. 128 */ 129 #define DS_FLAG_CI_DATASET (1ULL<<16) 130 131 #define DS_CREATE_FLAG_NODIRTY (1ULL<<24) 132 133 typedef struct dsl_dataset_phys { 134 uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */ 135 uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */ 136 uint64_t ds_prev_snap_txg; 137 uint64_t ds_next_snap_obj; /* DMU_OT_DSL_DATASET */ 138 uint64_t ds_snapnames_zapobj; /* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */ 139 uint64_t ds_num_children; /* clone/snap children; ==0 for head */ 140 uint64_t ds_creation_time; /* seconds since 1970 */ 141 uint64_t ds_creation_txg; 142 uint64_t ds_deadlist_obj; /* DMU_OT_DEADLIST */ 143 /* 144 * ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes 145 * include all blocks referenced by this dataset, including those 146 * shared with any other datasets. 147 */ 148 uint64_t ds_referenced_bytes; 149 uint64_t ds_compressed_bytes; 150 uint64_t ds_uncompressed_bytes; 151 uint64_t ds_unique_bytes; /* only relevant to snapshots */ 152 /* 153 * The ds_fsid_guid is a 56-bit ID that can change to avoid 154 * collisions. The ds_guid is a 64-bit ID that will never 155 * change, so there is a small probability that it will collide. 156 */ 157 uint64_t ds_fsid_guid; 158 uint64_t ds_guid; 159 uint64_t ds_flags; /* DS_FLAG_* */ 160 blkptr_t ds_bp; 161 uint64_t ds_next_clones_obj; /* DMU_OT_DSL_CLONES */ 162 uint64_t ds_props_obj; /* DMU_OT_DSL_PROPS for snaps */ 163 uint64_t ds_userrefs_obj; /* DMU_OT_USERREFS */ 164 uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */ 165 } dsl_dataset_phys_t; 166 167 typedef struct dsl_dataset { 168 dmu_buf_user_t ds_dbu; 169 rrwlock_t ds_bp_rwlock; /* Protects ds_phys->ds_bp */ 170 171 /* Immutable: */ 172 struct dsl_dir *ds_dir; 173 dmu_buf_t *ds_dbuf; 174 uint64_t ds_object; 175 uint64_t ds_fsid_guid; 176 boolean_t ds_is_snapshot; 177 struct dsl_key_mapping *ds_key_mapping; 178 179 /* only used in syncing context, only valid for non-snapshots: */ 180 struct dsl_dataset *ds_prev; 181 uint64_t ds_bookmarks; /* DMU_OTN_ZAP_METADATA */ 182 183 /* has internal locking: */ 184 dsl_deadlist_t ds_deadlist; 185 bplist_t ds_pending_deadlist; 186 187 /* 188 * The remap deadlist contains blocks (DVA's, really) that are 189 * referenced by the previous snapshot and point to indirect vdevs, 190 * but in this dataset they have been remapped to point to concrete 191 * (or at least, less-indirect) vdevs. In other words, the 192 * physical DVA is referenced by the previous snapshot but not by 193 * this dataset. Logically, the DVA continues to be referenced, 194 * but we are using a different (less indirect) physical DVA. 195 * This deadlist is used to determine when physical DVAs that 196 * point to indirect vdevs are no longer referenced anywhere, 197 * and thus should be marked obsolete. 198 * 199 * This is only used if SPA_FEATURE_OBSOLETE_COUNTS is enabled. 200 */ 201 dsl_deadlist_t ds_remap_deadlist; 202 /* protects creation of the ds_remap_deadlist */ 203 kmutex_t ds_remap_deadlist_lock; 204 205 /* protected by lock on pool's dp_dirty_datasets list */ 206 txg_node_t ds_dirty_link; 207 list_node_t ds_synced_link; 208 209 /* 210 * ds_phys->ds_<accounting> is also protected by ds_lock. 211 * Protected by ds_lock: 212 */ 213 kmutex_t ds_lock; 214 objset_t *ds_objset; 215 uint64_t ds_userrefs; 216 void *ds_owner; 217 218 /* 219 * Long holds prevent the ds from being destroyed; they allow the 220 * ds to remain held even after dropping the dp_config_rwlock. 221 * Owning counts as a long hold. See the comments above 222 * dsl_pool_hold() for details. 223 */ 224 zfs_refcount_t ds_longholds; 225 226 /* no locking; only for making guesses */ 227 uint64_t ds_trysnap_txg; 228 229 /* for objset_open() */ 230 kmutex_t ds_opening_lock; 231 232 uint64_t ds_reserved; /* cached refreservation */ 233 uint64_t ds_quota; /* cached refquota */ 234 235 kmutex_t ds_sendstream_lock; 236 list_t ds_sendstreams; 237 238 /* 239 * When in the middle of a resumable receive, tracks how much 240 * progress we have made. 241 */ 242 uint64_t ds_resume_object[TXG_SIZE]; 243 uint64_t ds_resume_offset[TXG_SIZE]; 244 uint64_t ds_resume_bytes[TXG_SIZE]; 245 246 /* Protected by our dsl_dir's dd_lock */ 247 list_t ds_prop_cbs; 248 249 /* 250 * For ZFEATURE_FLAG_PER_DATASET features, set if this dataset 251 * uses this feature. 252 */ 253 uint8_t ds_feature_inuse[SPA_FEATURES]; 254 255 /* 256 * Set if we need to activate the feature on this dataset this txg 257 * (used only in syncing context). 258 */ 259 uint8_t ds_feature_activation_needed[SPA_FEATURES]; 260 261 /* Protected by ds_lock; keep at end of struct for better locality */ 262 char ds_snapname[ZFS_MAX_DATASET_NAME_LEN]; 263 } dsl_dataset_t; 264 265 inline dsl_dataset_phys_t * 266 dsl_dataset_phys(dsl_dataset_t *ds) 267 { 268 return (ds->ds_dbuf->db_data); 269 } 270 271 typedef struct dsl_dataset_promote_arg { 272 const char *ddpa_clonename; 273 dsl_dataset_t *ddpa_clone; 274 list_t shared_snaps, origin_snaps, clone_snaps; 275 dsl_dataset_t *origin_origin; /* origin of the origin */ 276 uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap; 277 nvlist_t *err_ds; 278 cred_t *cr; 279 } dsl_dataset_promote_arg_t; 280 281 typedef struct dsl_dataset_rollback_arg { 282 const char *ddra_fsname; 283 const char *ddra_tosnap; 284 void *ddra_owner; 285 nvlist_t *ddra_result; 286 } dsl_dataset_rollback_arg_t; 287 288 typedef struct dsl_dataset_snapshot_arg { 289 nvlist_t *ddsa_snaps; 290 nvlist_t *ddsa_props; 291 nvlist_t *ddsa_errors; 292 cred_t *ddsa_cr; 293 } dsl_dataset_snapshot_arg_t; 294 295 /* 296 * The max length of a temporary tag prefix is the number of hex digits 297 * required to express UINT64_MAX plus one for the hyphen. 298 */ 299 #define MAX_TAG_PREFIX_LEN 17 300 301 #define dsl_dataset_is_snapshot(ds) \ 302 (dsl_dataset_phys(ds)->ds_num_children != 0) 303 304 #define DS_UNIQUE_IS_ACCURATE(ds) \ 305 ((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0) 306 307 /* flags for holding the dataset */ 308 typedef enum ds_hold_flags { 309 DS_HOLD_FLAG_NONE = 0 << 0, 310 DS_HOLD_FLAG_DECRYPT = 1 << 0 /* needs access to encrypted data */ 311 } ds_hold_flags_t; 312 313 int dsl_dataset_hold(struct dsl_pool *dp, const char *name, void *tag, 314 dsl_dataset_t **dsp); 315 int dsl_dataset_hold_flags(struct dsl_pool *dp, const char *name, 316 ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp); 317 boolean_t dsl_dataset_try_add_ref(struct dsl_pool *dp, dsl_dataset_t *ds, 318 void *tag); 319 int dsl_dataset_create_key_mapping(dsl_dataset_t *ds); 320 int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj, void *tag, 321 dsl_dataset_t **); 322 int dsl_dataset_hold_obj_flags(struct dsl_pool *dp, uint64_t dsobj, 323 ds_hold_flags_t flags, void *tag, dsl_dataset_t **); 324 void dsl_dataset_remove_key_mapping(dsl_dataset_t *ds); 325 void dsl_dataset_rele(dsl_dataset_t *ds, void *tag); 326 void dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags, 327 void *tag); 328 int dsl_dataset_own(struct dsl_pool *dp, const char *name, 329 ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp); 330 int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj, 331 ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp); 332 void dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag); 333 void dsl_dataset_name(dsl_dataset_t *ds, char *name); 334 boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, void *tag); 335 int dsl_dataset_namelen(dsl_dataset_t *ds); 336 boolean_t dsl_dataset_has_owner(dsl_dataset_t *ds); 337 uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname, 338 dsl_dataset_t *origin, uint64_t flags, cred_t *, 339 struct dsl_crypto_params *, dmu_tx_t *); 340 uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, 341 struct dsl_crypto_params *dcp, uint64_t flags, dmu_tx_t *tx); 342 void dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx); 343 int dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx); 344 int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors); 345 void dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx); 346 int dsl_dataset_promote_check(void *arg, dmu_tx_t *tx); 347 int dsl_dataset_promote(const char *name, char *conflsnap); 348 int dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, 349 boolean_t force); 350 int dsl_dataset_rename_snapshot(const char *fsname, 351 const char *oldsnapname, const char *newsnapname, boolean_t recursive); 352 int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, 353 minor_t cleanup_minor, const char *htag); 354 355 blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds); 356 357 spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds); 358 359 boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds, 360 dsl_dataset_t *snap); 361 362 void dsl_dataset_sync(dsl_dataset_t *os, zio_t *zio, dmu_tx_t *tx); 363 void dsl_dataset_sync_done(dsl_dataset_t *os, dmu_tx_t *tx); 364 365 void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, 366 dmu_tx_t *tx); 367 int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, 368 dmu_tx_t *tx, boolean_t async); 369 void dsl_dataset_block_remapped(dsl_dataset_t *ds, uint64_t vdev, 370 uint64_t offset, uint64_t size, uint64_t birth, dmu_tx_t *tx); 371 372 void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx); 373 374 int get_clones_stat_impl(dsl_dataset_t *ds, nvlist_t *val); 375 char *get_receive_resume_stats_impl(dsl_dataset_t *ds); 376 char *get_child_receive_stats(dsl_dataset_t *ds); 377 uint64_t dsl_get_refratio(dsl_dataset_t *ds); 378 uint64_t dsl_get_logicalreferenced(dsl_dataset_t *ds); 379 uint64_t dsl_get_compressratio(dsl_dataset_t *ds); 380 uint64_t dsl_get_used(dsl_dataset_t *ds); 381 uint64_t dsl_get_creation(dsl_dataset_t *ds); 382 uint64_t dsl_get_creationtxg(dsl_dataset_t *ds); 383 uint64_t dsl_get_refquota(dsl_dataset_t *ds); 384 uint64_t dsl_get_refreservation(dsl_dataset_t *ds); 385 uint64_t dsl_get_guid(dsl_dataset_t *ds); 386 uint64_t dsl_get_unique(dsl_dataset_t *ds); 387 uint64_t dsl_get_objsetid(dsl_dataset_t *ds); 388 uint64_t dsl_get_userrefs(dsl_dataset_t *ds); 389 uint64_t dsl_get_defer_destroy(dsl_dataset_t *ds); 390 uint64_t dsl_get_referenced(dsl_dataset_t *ds); 391 uint64_t dsl_get_numclones(dsl_dataset_t *ds); 392 uint64_t dsl_get_inconsistent(dsl_dataset_t *ds); 393 uint64_t dsl_get_available(dsl_dataset_t *ds); 394 int dsl_get_written(dsl_dataset_t *ds, uint64_t *written); 395 int dsl_get_prev_snap(dsl_dataset_t *ds, char *snap); 396 int dsl_get_mountpoint(dsl_dataset_t *ds, const char *dsname, char *value, 397 char *source); 398 399 void get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv); 400 401 void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv); 402 403 void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat); 404 void dsl_dataset_space(dsl_dataset_t *ds, 405 uint64_t *refdbytesp, uint64_t *availbytesp, 406 uint64_t *usedobjsp, uint64_t *availobjsp); 407 uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds); 408 int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new, 409 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp); 410 int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last, 411 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp); 412 boolean_t dsl_dataset_is_dirty(dsl_dataset_t *ds); 413 414 int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf); 415 416 int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, 417 uint64_t asize, uint64_t inflight, uint64_t *used, 418 uint64_t *ref_rsrv); 419 int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, 420 uint64_t quota); 421 int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, 422 uint64_t reservation); 423 424 boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, 425 uint64_t earlier_txg); 426 void dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag); 427 void dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag); 428 boolean_t dsl_dataset_long_held(dsl_dataset_t *ds); 429 430 int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, 431 dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx); 432 void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, 433 dsl_dataset_t *origin_head, dmu_tx_t *tx); 434 int dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, 435 dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr); 436 void dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, 437 dmu_tx_t *tx); 438 439 void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, 440 dmu_tx_t *tx); 441 void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds); 442 int dsl_dataset_get_snapname(dsl_dataset_t *ds); 443 int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, 444 uint64_t *value); 445 int dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, 446 boolean_t adj_cnt); 447 void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, 448 zprop_source_t source, uint64_t value, dmu_tx_t *tx); 449 void dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx); 450 boolean_t dsl_dataset_is_zapified(dsl_dataset_t *ds); 451 boolean_t dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds); 452 453 int dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx); 454 void dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx); 455 int dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner, 456 nvlist_t *result); 457 458 uint64_t dsl_dataset_get_remap_deadlist_object(dsl_dataset_t *ds); 459 void dsl_dataset_create_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx); 460 boolean_t dsl_dataset_remap_deadlist_exists(dsl_dataset_t *ds); 461 void dsl_dataset_destroy_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx); 462 463 void dsl_dataset_activate_feature(uint64_t dsobj, 464 spa_feature_t f, dmu_tx_t *tx); 465 void dsl_dataset_deactivate_feature(uint64_t dsobj, 466 spa_feature_t f, dmu_tx_t *tx); 467 468 #ifdef ZFS_DEBUG 469 #define dprintf_ds(ds, fmt, ...) do { \ 470 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 471 char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \ 472 dsl_dataset_name(ds, __ds_name); \ 473 dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \ 474 kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \ 475 } \ 476 _NOTE(CONSTCOND) } while (0) 477 #else 478 #define dprintf_ds(dd, fmt, ...) 479 #endif 480 481 #ifdef __cplusplus 482 } 483 #endif 484 485 #endif /* _SYS_DSL_DATASET_H */ 486