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) 2012, 2020 by Delphix. All rights reserved. 24 * Copyright 2016 RackTop Systems. 25 * Copyright (c) 2017, Intel Corporation. 26 */ 27 28 #ifndef _SYS_ZFS_IOCTL_H 29 #define _SYS_ZFS_IOCTL_H 30 31 #include <sys/cred.h> 32 #include <sys/dmu.h> 33 #include <sys/zio.h> 34 #include <sys/dsl_deleg.h> 35 #include <sys/spa.h> 36 #include <sys/zfs_stat.h> 37 38 #ifdef _KERNEL 39 #include <sys/nvpair.h> 40 #endif /* _KERNEL */ 41 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 /* 47 * The structures in this file are passed between userland and the 48 * kernel. Userland may be running a 32-bit process, while the kernel 49 * is 64-bit. Therefore, these structures need to compile the same in 50 * 32-bit and 64-bit. This means not using type "long", and adding 51 * explicit padding so that the 32-bit structure will not be packed more 52 * tightly than the 64-bit structure (which requires 64-bit alignment). 53 */ 54 55 /* 56 * Property values for snapdir 57 */ 58 #define ZFS_SNAPDIR_HIDDEN 0 59 #define ZFS_SNAPDIR_VISIBLE 1 60 61 /* 62 * Property values for snapdev 63 */ 64 #define ZFS_SNAPDEV_HIDDEN 0 65 #define ZFS_SNAPDEV_VISIBLE 1 66 /* 67 * Property values for acltype 68 */ 69 #define ZFS_ACLTYPE_OFF 0 70 #define ZFS_ACLTYPE_POSIXACL 1 71 72 /* 73 * Field manipulation macros for the drr_versioninfo field of the 74 * send stream header. 75 */ 76 77 /* 78 * Header types for zfs send streams. 79 */ 80 typedef enum drr_headertype { 81 DMU_SUBSTREAM = 0x1, 82 DMU_COMPOUNDSTREAM = 0x2 83 } drr_headertype_t; 84 85 #define DMU_GET_STREAM_HDRTYPE(vi) BF64_GET((vi), 0, 2) 86 #define DMU_SET_STREAM_HDRTYPE(vi, x) BF64_SET((vi), 0, 2, x) 87 88 #define DMU_GET_FEATUREFLAGS(vi) BF64_GET((vi), 2, 30) 89 #define DMU_SET_FEATUREFLAGS(vi, x) BF64_SET((vi), 2, 30, x) 90 91 /* 92 * Feature flags for zfs send streams (flags in drr_versioninfo) 93 */ 94 95 #define DMU_BACKUP_FEATURE_DEDUP (1 << 0) 96 #define DMU_BACKUP_FEATURE_DEDUPPROPS (1 << 1) 97 #define DMU_BACKUP_FEATURE_SA_SPILL (1 << 2) 98 /* flags #3 - #15 are reserved for incompatible closed-source implementations */ 99 #define DMU_BACKUP_FEATURE_EMBED_DATA (1 << 16) 100 #define DMU_BACKUP_FEATURE_LZ4 (1 << 17) 101 /* flag #18 is reserved for a Delphix feature */ 102 #define DMU_BACKUP_FEATURE_LARGE_BLOCKS (1 << 19) 103 #define DMU_BACKUP_FEATURE_RESUMING (1 << 20) 104 #define DMU_BACKUP_FEATURE_REDACTED (1 << 21) 105 #define DMU_BACKUP_FEATURE_COMPRESSED (1 << 22) 106 #define DMU_BACKUP_FEATURE_LARGE_DNODE (1 << 23) 107 #define DMU_BACKUP_FEATURE_RAW (1 << 24) 108 #define DMU_BACKUP_FEATURE_ZSTD (1 << 25) 109 #define DMU_BACKUP_FEATURE_HOLDS (1 << 26) 110 /* 111 * The SWITCH_TO_LARGE_BLOCKS feature indicates that we can receive 112 * incremental LARGE_BLOCKS streams (those with WRITE records of >128KB) even 113 * if the previous send did not use LARGE_BLOCKS, and thus its large blocks 114 * were split into multiple 128KB WRITE records. (See 115 * flush_write_batch_impl() and receive_object()). Older software that does 116 * not support this flag may encounter a bug when switching to large blocks, 117 * which causes files to incorrectly be zeroed. 118 * 119 * This flag is currently not set on any send streams. In the future, we 120 * intend for incremental send streams of snapshots that have large blocks to 121 * use LARGE_BLOCKS by default, and these streams will also have the 122 * SWITCH_TO_LARGE_BLOCKS feature set. This ensures that streams from the 123 * default use of "zfs send" won't encounter the bug mentioned above. 124 */ 125 #define DMU_BACKUP_FEATURE_SWITCH_TO_LARGE_BLOCKS (1 << 27) 126 127 /* 128 * Mask of all supported backup features 129 */ 130 #define DMU_BACKUP_FEATURE_MASK (DMU_BACKUP_FEATURE_SA_SPILL | \ 131 DMU_BACKUP_FEATURE_EMBED_DATA | DMU_BACKUP_FEATURE_LZ4 | \ 132 DMU_BACKUP_FEATURE_RESUMING | DMU_BACKUP_FEATURE_LARGE_BLOCKS | \ 133 DMU_BACKUP_FEATURE_COMPRESSED | DMU_BACKUP_FEATURE_LARGE_DNODE | \ 134 DMU_BACKUP_FEATURE_RAW | DMU_BACKUP_FEATURE_HOLDS | \ 135 DMU_BACKUP_FEATURE_REDACTED | DMU_BACKUP_FEATURE_SWITCH_TO_LARGE_BLOCKS | \ 136 DMU_BACKUP_FEATURE_ZSTD) 137 138 /* Are all features in the given flag word currently supported? */ 139 #define DMU_STREAM_SUPPORTED(x) (!((x) & ~DMU_BACKUP_FEATURE_MASK)) 140 141 typedef enum dmu_send_resume_token_version { 142 ZFS_SEND_RESUME_TOKEN_VERSION = 1 143 } dmu_send_resume_token_version_t; 144 145 /* 146 * The drr_versioninfo field of the dmu_replay_record has the 147 * following layout: 148 * 149 * 64 56 48 40 32 24 16 8 0 150 * +-------+-------+-------+-------+-------+-------+-------+-------+ 151 * | reserved | feature-flags |C|S| 152 * +-------+-------+-------+-------+-------+-------+-------+-------+ 153 * 154 * The low order two bits indicate the header type: SUBSTREAM (0x1) 155 * or COMPOUNDSTREAM (0x2). Using two bits for this is historical: 156 * this field used to be a version number, where the two version types 157 * were 1 and 2. Using two bits for this allows earlier versions of 158 * the code to be able to recognize send streams that don't use any 159 * of the features indicated by feature flags. 160 */ 161 162 #define DMU_BACKUP_MAGIC 0x2F5bacbacULL 163 164 /* 165 * Send stream flags. Bits 24-31 are reserved for vendor-specific 166 * implementations and should not be used. 167 */ 168 #define DRR_FLAG_CLONE (1<<0) 169 #define DRR_FLAG_CI_DATA (1<<1) 170 /* 171 * This send stream, if it is a full send, includes the FREE and FREEOBJECT 172 * records that are created by the sending process. This means that the send 173 * stream can be received as a clone, even though it is not an incremental. 174 * This is not implemented as a feature flag, because the receiving side does 175 * not need to have implemented it to receive this stream; it is fully backwards 176 * compatible. We need a flag, though, because full send streams without it 177 * cannot necessarily be received as a clone correctly. 178 */ 179 #define DRR_FLAG_FREERECORDS (1<<2) 180 /* 181 * When DRR_FLAG_SPILL_BLOCK is set it indicates the DRR_OBJECT_SPILL 182 * and DRR_SPILL_UNMODIFIED flags are meaningful in the send stream. 183 * 184 * When DRR_FLAG_SPILL_BLOCK is set, DRR_OBJECT records will have 185 * DRR_OBJECT_SPILL set if and only if they should have a spill block 186 * (either an existing one, or a new one in the send stream). When clear 187 * the object does not have a spill block and any existing spill block 188 * should be freed. 189 * 190 * Similarly, when DRR_FLAG_SPILL_BLOCK is set, DRR_SPILL records will 191 * have DRR_SPILL_UNMODIFIED set if and only if they were included for 192 * backward compatibility purposes, and can be safely ignored by new versions 193 * of zfs receive. Previous versions of ZFS which do not understand the 194 * DRR_FLAG_SPILL_BLOCK will process this record and recreate any missing 195 * spill blocks. 196 */ 197 #define DRR_FLAG_SPILL_BLOCK (1<<3) 198 199 /* 200 * flags in the drr_flags field in the DRR_WRITE, DRR_SPILL, DRR_OBJECT, 201 * DRR_WRITE_BYREF, and DRR_OBJECT_RANGE blocks 202 */ 203 #define DRR_CHECKSUM_DEDUP (1<<0) /* not used for SPILL records */ 204 #define DRR_RAW_BYTESWAP (1<<1) 205 #define DRR_OBJECT_SPILL (1<<2) /* OBJECT record has a spill block */ 206 #define DRR_SPILL_UNMODIFIED (1<<2) /* SPILL record for unmodified block */ 207 208 #define DRR_IS_DEDUP_CAPABLE(flags) ((flags) & DRR_CHECKSUM_DEDUP) 209 #define DRR_IS_RAW_BYTESWAPPED(flags) ((flags) & DRR_RAW_BYTESWAP) 210 #define DRR_OBJECT_HAS_SPILL(flags) ((flags) & DRR_OBJECT_SPILL) 211 #define DRR_SPILL_IS_UNMODIFIED(flags) ((flags) & DRR_SPILL_UNMODIFIED) 212 213 /* deal with compressed drr_write replay records */ 214 #define DRR_WRITE_COMPRESSED(drrw) ((drrw)->drr_compressiontype != 0) 215 #define DRR_WRITE_PAYLOAD_SIZE(drrw) \ 216 (DRR_WRITE_COMPRESSED(drrw) ? (drrw)->drr_compressed_size : \ 217 (drrw)->drr_logical_size) 218 #define DRR_SPILL_PAYLOAD_SIZE(drrs) \ 219 ((drrs)->drr_compressed_size ? \ 220 (drrs)->drr_compressed_size : (drrs)->drr_length) 221 #define DRR_OBJECT_PAYLOAD_SIZE(drro) \ 222 ((drro)->drr_raw_bonuslen != 0 ? \ 223 (drro)->drr_raw_bonuslen : P2ROUNDUP((drro)->drr_bonuslen, 8)) 224 225 /* 226 * zfs ioctl command structure 227 */ 228 229 /* Header is used in C++ so can't forward declare untagged struct */ 230 struct drr_begin { 231 uint64_t drr_magic; 232 uint64_t drr_versioninfo; /* was drr_version */ 233 uint64_t drr_creation_time; 234 dmu_objset_type_t drr_type; 235 uint32_t drr_flags; 236 uint64_t drr_toguid; 237 uint64_t drr_fromguid; 238 char drr_toname[MAXNAMELEN]; 239 }; 240 241 typedef struct dmu_replay_record { 242 enum { 243 DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS, 244 DRR_WRITE, DRR_FREE, DRR_END, DRR_WRITE_BYREF, 245 DRR_SPILL, DRR_WRITE_EMBEDDED, DRR_OBJECT_RANGE, DRR_REDACT, 246 DRR_NUMTYPES 247 } drr_type; 248 uint32_t drr_payloadlen; 249 union { 250 struct drr_begin drr_begin; 251 struct drr_end { 252 zio_cksum_t drr_checksum; 253 uint64_t drr_toguid; 254 } drr_end; 255 struct drr_object { 256 uint64_t drr_object; 257 dmu_object_type_t drr_type; 258 dmu_object_type_t drr_bonustype; 259 uint32_t drr_blksz; 260 uint32_t drr_bonuslen; 261 uint8_t drr_checksumtype; 262 uint8_t drr_compress; 263 uint8_t drr_dn_slots; 264 uint8_t drr_flags; 265 uint32_t drr_raw_bonuslen; 266 uint64_t drr_toguid; 267 /* only (possibly) nonzero for raw streams */ 268 uint8_t drr_indblkshift; 269 uint8_t drr_nlevels; 270 uint8_t drr_nblkptr; 271 uint8_t drr_pad[5]; 272 uint64_t drr_maxblkid; 273 /* bonus content follows */ 274 } drr_object; 275 struct drr_freeobjects { 276 uint64_t drr_firstobj; 277 uint64_t drr_numobjs; 278 uint64_t drr_toguid; 279 } drr_freeobjects; 280 struct drr_write { 281 uint64_t drr_object; 282 dmu_object_type_t drr_type; 283 uint32_t drr_pad; 284 uint64_t drr_offset; 285 uint64_t drr_logical_size; 286 uint64_t drr_toguid; 287 uint8_t drr_checksumtype; 288 uint8_t drr_flags; 289 uint8_t drr_compressiontype; 290 uint8_t drr_pad2[5]; 291 /* deduplication key */ 292 ddt_key_t drr_key; 293 /* only nonzero if drr_compressiontype is not 0 */ 294 uint64_t drr_compressed_size; 295 /* only nonzero for raw streams */ 296 uint8_t drr_salt[ZIO_DATA_SALT_LEN]; 297 uint8_t drr_iv[ZIO_DATA_IV_LEN]; 298 uint8_t drr_mac[ZIO_DATA_MAC_LEN]; 299 /* content follows */ 300 } drr_write; 301 struct drr_free { 302 uint64_t drr_object; 303 uint64_t drr_offset; 304 uint64_t drr_length; 305 uint64_t drr_toguid; 306 } drr_free; 307 struct drr_write_byref { 308 /* where to put the data */ 309 uint64_t drr_object; 310 uint64_t drr_offset; 311 uint64_t drr_length; 312 uint64_t drr_toguid; 313 /* where to find the prior copy of the data */ 314 uint64_t drr_refguid; 315 uint64_t drr_refobject; 316 uint64_t drr_refoffset; 317 /* properties of the data */ 318 uint8_t drr_checksumtype; 319 uint8_t drr_flags; 320 uint8_t drr_pad2[6]; 321 ddt_key_t drr_key; /* deduplication key */ 322 } drr_write_byref; 323 struct drr_spill { 324 uint64_t drr_object; 325 uint64_t drr_length; 326 uint64_t drr_toguid; 327 uint8_t drr_flags; 328 uint8_t drr_compressiontype; 329 uint8_t drr_pad[6]; 330 /* only nonzero for raw streams */ 331 uint64_t drr_compressed_size; 332 uint8_t drr_salt[ZIO_DATA_SALT_LEN]; 333 uint8_t drr_iv[ZIO_DATA_IV_LEN]; 334 uint8_t drr_mac[ZIO_DATA_MAC_LEN]; 335 dmu_object_type_t drr_type; 336 /* spill data follows */ 337 } drr_spill; 338 struct drr_write_embedded { 339 uint64_t drr_object; 340 uint64_t drr_offset; 341 /* logical length, should equal blocksize */ 342 uint64_t drr_length; 343 uint64_t drr_toguid; 344 uint8_t drr_compression; 345 uint8_t drr_etype; 346 uint8_t drr_pad[6]; 347 uint32_t drr_lsize; /* uncompressed size of payload */ 348 uint32_t drr_psize; /* compr. (real) size of payload */ 349 /* (possibly compressed) content follows */ 350 } drr_write_embedded; 351 struct drr_object_range { 352 uint64_t drr_firstobj; 353 uint64_t drr_numslots; 354 uint64_t drr_toguid; 355 uint8_t drr_salt[ZIO_DATA_SALT_LEN]; 356 uint8_t drr_iv[ZIO_DATA_IV_LEN]; 357 uint8_t drr_mac[ZIO_DATA_MAC_LEN]; 358 uint8_t drr_flags; 359 uint8_t drr_pad[3]; 360 } drr_object_range; 361 struct drr_redact { 362 uint64_t drr_object; 363 uint64_t drr_offset; 364 uint64_t drr_length; 365 uint64_t drr_toguid; 366 } drr_redact; 367 368 /* 369 * Note: drr_checksum is overlaid with all record types 370 * except DRR_BEGIN. Therefore its (non-pad) members 371 * must not overlap with members from the other structs. 372 * We accomplish this by putting its members at the very 373 * end of the struct. 374 */ 375 struct drr_checksum { 376 uint64_t drr_pad[34]; 377 /* 378 * fletcher-4 checksum of everything preceding the 379 * checksum. 380 */ 381 zio_cksum_t drr_checksum; 382 } drr_checksum; 383 } drr_u; 384 } dmu_replay_record_t; 385 386 /* diff record range types */ 387 typedef enum diff_type { 388 DDR_NONE = 0x1, 389 DDR_INUSE = 0x2, 390 DDR_FREE = 0x4 391 } diff_type_t; 392 393 /* 394 * The diff reports back ranges of free or in-use objects. 395 */ 396 typedef struct dmu_diff_record { 397 uint64_t ddr_type; 398 uint64_t ddr_first; 399 uint64_t ddr_last; 400 } dmu_diff_record_t; 401 402 typedef struct zinject_record { 403 uint64_t zi_objset; 404 uint64_t zi_object; 405 uint64_t zi_start; 406 uint64_t zi_end; 407 uint64_t zi_guid; 408 uint32_t zi_level; 409 uint32_t zi_error; 410 uint64_t zi_type; 411 uint32_t zi_freq; 412 uint32_t zi_failfast; 413 char zi_func[MAXNAMELEN]; 414 uint32_t zi_iotype; 415 int32_t zi_duration; 416 uint64_t zi_timer; 417 uint64_t zi_nlanes; 418 uint32_t zi_cmd; 419 uint32_t zi_dvas; 420 } zinject_record_t; 421 422 #define ZINJECT_NULL 0x1 423 #define ZINJECT_FLUSH_ARC 0x2 424 #define ZINJECT_UNLOAD_SPA 0x4 425 #define ZINJECT_CALC_RANGE 0x8 426 427 #define ZEVENT_NONE 0x0 428 #define ZEVENT_NONBLOCK 0x1 429 #define ZEVENT_SIZE 1024 430 431 #define ZEVENT_SEEK_START 0 432 #define ZEVENT_SEEK_END UINT64_MAX 433 434 /* scaled frequency ranges */ 435 #define ZI_PERCENTAGE_MIN 4294UL 436 #define ZI_PERCENTAGE_MAX UINT32_MAX 437 438 #define ZI_NO_DVA (-1) 439 440 typedef enum zinject_type { 441 ZINJECT_UNINITIALIZED, 442 ZINJECT_DATA_FAULT, 443 ZINJECT_DEVICE_FAULT, 444 ZINJECT_LABEL_FAULT, 445 ZINJECT_IGNORED_WRITES, 446 ZINJECT_PANIC, 447 ZINJECT_DELAY_IO, 448 ZINJECT_DECRYPT_FAULT, 449 } zinject_type_t; 450 451 typedef struct zfs_share { 452 uint64_t z_exportdata; 453 uint64_t z_sharedata; 454 uint64_t z_sharetype; /* 0 = share, 1 = unshare */ 455 uint64_t z_sharemax; /* max length of share string */ 456 } zfs_share_t; 457 458 /* 459 * ZFS file systems may behave the usual, POSIX-compliant way, where 460 * name lookups are case-sensitive. They may also be set up so that 461 * all the name lookups are case-insensitive, or so that only some 462 * lookups, the ones that set an FIGNORECASE flag, are case-insensitive. 463 */ 464 typedef enum zfs_case { 465 ZFS_CASE_SENSITIVE, 466 ZFS_CASE_INSENSITIVE, 467 ZFS_CASE_MIXED 468 } zfs_case_t; 469 470 /* 471 * Note: this struct must have the same layout in 32-bit and 64-bit, so 472 * that 32-bit processes (like /sbin/zfs) can pass it to the 64-bit 473 * kernel. Therefore, we add padding to it so that no "hidden" padding 474 * is automatically added on 64-bit (but not on 32-bit). 475 */ 476 typedef struct zfs_cmd { 477 char zc_name[MAXPATHLEN]; /* name of pool or dataset */ 478 uint64_t zc_nvlist_src; /* really (char *) */ 479 uint64_t zc_nvlist_src_size; 480 uint64_t zc_nvlist_dst; /* really (char *) */ 481 uint64_t zc_nvlist_dst_size; 482 boolean_t zc_nvlist_dst_filled; /* put an nvlist in dst? */ 483 int zc_pad2; 484 485 /* 486 * The following members are for legacy ioctls which haven't been 487 * converted to the new method. 488 */ 489 uint64_t zc_history; /* really (char *) */ 490 char zc_value[MAXPATHLEN * 2]; 491 char zc_string[MAXNAMELEN]; 492 uint64_t zc_guid; 493 uint64_t zc_nvlist_conf; /* really (char *) */ 494 uint64_t zc_nvlist_conf_size; 495 uint64_t zc_cookie; 496 uint64_t zc_objset_type; 497 uint64_t zc_perm_action; 498 uint64_t zc_history_len; 499 uint64_t zc_history_offset; 500 uint64_t zc_obj; 501 uint64_t zc_iflags; /* internal to zfs(7fs) */ 502 zfs_share_t zc_share; 503 dmu_objset_stats_t zc_objset_stats; 504 struct drr_begin zc_begin_record; 505 zinject_record_t zc_inject_record; 506 uint32_t zc_defer_destroy; 507 uint32_t zc_flags; 508 uint64_t zc_action_handle; 509 int zc_cleanup_fd; 510 uint8_t zc_simple; 511 uint8_t zc_pad[3]; /* alignment */ 512 uint64_t zc_sendobj; 513 uint64_t zc_fromobj; 514 uint64_t zc_createtxg; 515 zfs_stat_t zc_stat; 516 uint64_t zc_zoneid; 517 } zfs_cmd_t; 518 519 typedef struct zfs_useracct { 520 char zu_domain[256]; 521 uid_t zu_rid; 522 uint32_t zu_pad; 523 uint64_t zu_space; 524 } zfs_useracct_t; 525 526 #define ZFSDEV_MAX_MINOR (1 << 16) 527 #define ZFS_MIN_MINOR (ZFSDEV_MAX_MINOR + 1) 528 529 #define ZPOOL_EXPORT_AFTER_SPLIT 0x1 530 531 #ifdef _KERNEL 532 struct objset; 533 struct zfsvfs; 534 535 typedef struct zfs_creat { 536 nvlist_t *zct_zplprops; 537 nvlist_t *zct_props; 538 } zfs_creat_t; 539 540 extern int zfs_secpolicy_snapshot_perms(const char *, cred_t *); 541 extern int zfs_secpolicy_rename_perms(const char *, const char *, cred_t *); 542 extern int zfs_secpolicy_destroy_perms(const char *, cred_t *); 543 extern void zfs_unmount_snap(const char *); 544 extern void zfs_destroy_unmount_origin(const char *); 545 extern int getzfsvfs_impl(struct objset *, struct zfsvfs **); 546 extern int getzfsvfs(const char *, struct zfsvfs **); 547 548 enum zfsdev_state_type { 549 ZST_ONEXIT, 550 ZST_ZEVENT, 551 ZST_ALL, 552 }; 553 554 /* 555 * The zfsdev_state_t structure is managed as a singly-linked list 556 * from which items are never deleted. This allows for lock-free 557 * reading of the list so long as assignments to the zs_next and 558 * reads from zs_minor are performed atomically. Empty items are 559 * indicated by storing -1 into zs_minor. 560 */ 561 typedef struct zfsdev_state { 562 struct zfsdev_state *zs_next; /* next zfsdev_state_t link */ 563 minor_t zs_minor; /* made up minor number */ 564 void *zs_onexit; /* onexit data */ 565 void *zs_zevent; /* zevent data */ 566 } zfsdev_state_t; 567 568 extern void *zfsdev_get_state(minor_t minor, enum zfsdev_state_type which); 569 extern int zfsdev_getminor(int fd, minor_t *minorp); 570 extern minor_t zfsdev_minor_alloc(void); 571 572 extern uint_t zfs_fsyncer_key; 573 extern uint_t zfs_allow_log_key; 574 575 #endif /* _KERNEL */ 576 577 #ifdef __cplusplus 578 } 579 #endif 580 581 #endif /* _SYS_ZFS_IOCTL_H */ 582