1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * This file and its contents are supplied under the terms of the 4 * Common Development and Distribution License ("CDDL"), version 1.0. 5 * You may only use this file in accordance with the terms of version 6 * 1.0 of the CDDL. 7 * 8 * A full copy of the text of the CDDL should have accompanied this 9 * source. A copy of the CDDL is also available via the Internet at 10 * https://opensource.org/license/CDDL-1.0. 11 */ 12 /* 13 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 14 * Copyright (c) 2012, 2024 by Delphix. All rights reserved. 15 * Copyright 2016 RackTop Systems. 16 * Copyright (c) 2017, Intel Corporation. 17 * Copyright (c) 2024-2025, Klara, Inc. 18 */ 19 20 #ifndef _SYS_ZFS_IOCTL_H 21 #define _SYS_ZFS_IOCTL_H 22 23 #include <sys/cred.h> 24 #include <sys/dmu.h> 25 #include <sys/zio.h> 26 #include <sys/dsl_deleg.h> 27 #include <sys/spa.h> 28 #include <sys/zfs_stat.h> 29 30 #ifdef _KERNEL 31 #include <sys/nvpair.h> 32 #endif /* _KERNEL */ 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 /* 39 * The structures in this file are passed between userland and the 40 * kernel. Userland may be running a 32-bit process, while the kernel 41 * is 64-bit. Therefore, these structures need to compile the same in 42 * 32-bit and 64-bit. This means not using type "long", and adding 43 * explicit padding so that the 32-bit structure will not be packed more 44 * tightly than the 64-bit structure (which requires 64-bit alignment). 45 */ 46 47 /* 48 * Property values for snapdir 49 */ 50 #define ZFS_SNAPDIR_HIDDEN 0 51 #define ZFS_SNAPDIR_VISIBLE 1 52 #define ZFS_SNAPDIR_DISABLED 2 53 54 /* 55 * Property values for snapdev 56 */ 57 #define ZFS_SNAPDEV_HIDDEN 0 58 #define ZFS_SNAPDEV_VISIBLE 1 59 /* 60 * Property values for acltype 61 */ 62 #define ZFS_ACLTYPE_OFF 0 63 #define ZFS_ACLTYPE_POSIX 1 64 #define ZFS_ACLTYPE_NFSV4 2 65 66 /* 67 * The drr_versioninfo field of the dmu_replay_record has the 68 * following layout: 69 * 70 * 64 56 48 40 32 24 16 8 0 71 * +-------+-------+-------+-------+-------+-------+-------+-------+ 72 * |reserve| feature-flags |C|S| 73 * +-------+-------+-------+-------+-------+-------+-------+-------+ 74 * 75 * The low order two bits indicate the header type: SUBSTREAM (0x1) 76 * or COMPOUNDSTREAM (0x2). Using two bits for this is historical: 77 * this field used to be a version number, where the two version types 78 * were 1 and 2. Using two bits for this allows earlier versions of 79 * the code to be able to recognize send streams that don't use any 80 * of the features indicated by feature flags. 81 * 82 * The top 8 bits are reserved for future expansion. At time of writing there 83 * are no plans for these. If you want to use them, please reach out to the 84 * OpenZFS community, e.g., on GitHub or Slack. 85 */ 86 87 /* 88 * Field manipulation macros for the drr_versioninfo field of the 89 * send stream header. 90 */ 91 #define DMU_GET_STREAM_HDRTYPE(vi) BF64_GET((vi), 0, 2) 92 #define DMU_SET_STREAM_HDRTYPE(vi, x) BF64_SET((vi), 0, 2, x) 93 94 #define DMU_GET_FEATUREFLAGS(vi) BF64_GET((vi), 2, 56) 95 #define DMU_SET_FEATUREFLAGS(vi, x) BF64_SET((vi), 2, 56, x) 96 97 /* 98 * Header types for zfs send streams. 99 */ 100 typedef enum drr_headertype { 101 DMU_SUBSTREAM = 0x1, 102 DMU_COMPOUNDSTREAM = 0x2 103 } drr_headertype_t; 104 105 /* 106 * Feature flags for zfs send streams (flags in drr_versioninfo) 107 */ 108 #define DMU_BACKUP_FEATURE_DEDUP (1 << 0) 109 #define DMU_BACKUP_FEATURE_DEDUPPROPS (1 << 1) 110 #define DMU_BACKUP_FEATURE_SA_SPILL (1 << 2) 111 /* flags #3 - #15 are reserved for incompatible closed-source implementations */ 112 #define DMU_BACKUP_FEATURE_EMBED_DATA (1 << 16) 113 #define DMU_BACKUP_FEATURE_LZ4 (1 << 17) 114 /* flag #18 is reserved for a Delphix feature */ 115 #define DMU_BACKUP_FEATURE_LARGE_BLOCKS (1 << 19) 116 #define DMU_BACKUP_FEATURE_RESUMING (1 << 20) 117 #define DMU_BACKUP_FEATURE_REDACTED (1 << 21) 118 #define DMU_BACKUP_FEATURE_COMPRESSED (1 << 22) 119 #define DMU_BACKUP_FEATURE_LARGE_DNODE (1 << 23) 120 #define DMU_BACKUP_FEATURE_RAW (1 << 24) 121 #define DMU_BACKUP_FEATURE_ZSTD (1 << 25) 122 #define DMU_BACKUP_FEATURE_HOLDS (1 << 26) 123 /* 124 * The SWITCH_TO_LARGE_BLOCKS feature indicates that we can receive 125 * incremental LARGE_BLOCKS streams (those with WRITE records of >128KB) even 126 * if the previous send did not use LARGE_BLOCKS, and thus its large blocks 127 * were split into multiple 128KB WRITE records. (See 128 * flush_write_batch_impl() and receive_object()). Older software that does 129 * not support this flag may encounter a bug when switching to large blocks, 130 * which causes files to incorrectly be zeroed. 131 * 132 * This flag is currently not set on any send streams. In the future, we 133 * intend for incremental send streams of snapshots that have large blocks to 134 * use LARGE_BLOCKS by default, and these streams will also have the 135 * SWITCH_TO_LARGE_BLOCKS feature set. This ensures that streams from the 136 * default use of "zfs send" won't encounter the bug mentioned above. 137 */ 138 #define DMU_BACKUP_FEATURE_SWITCH_TO_LARGE_BLOCKS (1 << 27) 139 #define DMU_BACKUP_FEATURE_LONGNAME (1 << 28) 140 #define DMU_BACKUP_FEATURE_LARGE_MICROZAP (1 << 29) 141 142 /* 143 * Mask of all supported backup features 144 */ 145 #define DMU_BACKUP_FEATURE_MASK (DMU_BACKUP_FEATURE_SA_SPILL | \ 146 DMU_BACKUP_FEATURE_EMBED_DATA | DMU_BACKUP_FEATURE_LZ4 | \ 147 DMU_BACKUP_FEATURE_RESUMING | DMU_BACKUP_FEATURE_LARGE_BLOCKS | \ 148 DMU_BACKUP_FEATURE_COMPRESSED | DMU_BACKUP_FEATURE_LARGE_DNODE | \ 149 DMU_BACKUP_FEATURE_RAW | DMU_BACKUP_FEATURE_HOLDS | \ 150 DMU_BACKUP_FEATURE_REDACTED | DMU_BACKUP_FEATURE_SWITCH_TO_LARGE_BLOCKS | \ 151 DMU_BACKUP_FEATURE_ZSTD | DMU_BACKUP_FEATURE_LONGNAME | \ 152 DMU_BACKUP_FEATURE_LARGE_MICROZAP) 153 154 /* Are all features in the given flag word currently supported? */ 155 #define DMU_STREAM_SUPPORTED(x) (!((x) & ~DMU_BACKUP_FEATURE_MASK)) 156 157 typedef enum dmu_send_resume_token_version { 158 ZFS_SEND_RESUME_TOKEN_VERSION = 1 159 } dmu_send_resume_token_version_t; 160 161 #define DMU_BACKUP_MAGIC 0x2F5bacbacULL 162 163 /* 164 * Send stream flags. Bits 24-31 are reserved for vendor-specific 165 * implementations and should not be used. 166 */ 167 #define DRR_FLAG_CLONE (1<<0) 168 #define DRR_FLAG_CI_DATA (1<<1) 169 /* 170 * This send stream, if it is a full send, includes the FREE and FREEOBJECT 171 * records that are created by the sending process. This means that the send 172 * stream can be received as a clone, even though it is not an incremental. 173 * This is not implemented as a feature flag, because the receiving side does 174 * not need to have implemented it to receive this stream; it is fully backwards 175 * compatible. We need a flag, though, because full send streams without it 176 * cannot necessarily be received as a clone correctly. 177 */ 178 #define DRR_FLAG_FREERECORDS (1<<2) 179 /* 180 * When DRR_FLAG_SPILL_BLOCK is set it indicates the DRR_OBJECT_SPILL 181 * and DRR_SPILL_UNMODIFIED flags are meaningful in the send stream. 182 * 183 * When DRR_FLAG_SPILL_BLOCK is set, DRR_OBJECT records will have 184 * DRR_OBJECT_SPILL set if and only if they should have a spill block 185 * (either an existing one, or a new one in the send stream). When clear 186 * the object does not have a spill block and any existing spill block 187 * should be freed. 188 * 189 * Similarly, when DRR_FLAG_SPILL_BLOCK is set, DRR_SPILL records will 190 * have DRR_SPILL_UNMODIFIED set if and only if they were included for 191 * backward compatibility purposes, and can be safely ignored by new versions 192 * of zfs receive. Previous versions of ZFS which do not understand the 193 * DRR_FLAG_SPILL_BLOCK will process this record and recreate any missing 194 * spill blocks. 195 */ 196 #define DRR_FLAG_SPILL_BLOCK (1<<3) 197 198 /* 199 * flags in the drr_flags field in the DRR_WRITE, DRR_SPILL, DRR_OBJECT, 200 * DRR_WRITE_BYREF, and DRR_OBJECT_RANGE blocks 201 */ 202 #define DRR_CHECKSUM_DEDUP (1<<0) /* not used for SPILL records */ 203 #define DRR_RAW_BYTESWAP (1<<1) 204 #define DRR_OBJECT_SPILL (1<<2) /* OBJECT record has a spill block */ 205 #define DRR_SPILL_UNMODIFIED (1<<2) /* SPILL record for unmodified block */ 206 207 #define DRR_IS_DEDUP_CAPABLE(flags) ((flags) & DRR_CHECKSUM_DEDUP) 208 #define DRR_IS_RAW_BYTESWAPPED(flags) ((flags) & DRR_RAW_BYTESWAP) 209 #define DRR_OBJECT_HAS_SPILL(flags) ((flags) & DRR_OBJECT_SPILL) 210 #define DRR_SPILL_IS_UNMODIFIED(flags) ((flags) & DRR_SPILL_UNMODIFIED) 211 212 /* deal with compressed drr_write replay records */ 213 #define DRR_WRITE_COMPRESSED(drrw) ((drrw)->drr_compressiontype != 0) 214 #define DRR_WRITE_PAYLOAD_SIZE(drrw) \ 215 (DRR_WRITE_COMPRESSED(drrw) ? (drrw)->drr_compressed_size : \ 216 (drrw)->drr_logical_size) 217 #define DRR_SPILL_PAYLOAD_SIZE(drrs) \ 218 ((drrs)->drr_compressed_size ? \ 219 (drrs)->drr_compressed_size : (drrs)->drr_length) 220 #define DRR_OBJECT_PAYLOAD_SIZE(drro) \ 221 ((drro)->drr_raw_bonuslen != 0 ? \ 222 (drro)->drr_raw_bonuslen : P2ROUNDUP((drro)->drr_bonuslen, 8)) 223 224 /* Header is used in C++ so can't forward declare untagged struct */ 225 struct drr_begin { 226 uint64_t drr_magic; 227 uint64_t drr_versioninfo; /* was drr_version */ 228 uint64_t drr_creation_time; 229 dmu_objset_type_t drr_type; 230 uint32_t drr_flags; 231 uint64_t drr_toguid; 232 uint64_t drr_fromguid; 233 char drr_toname[MAXNAMELEN]; 234 }; 235 236 typedef struct dmu_replay_record { 237 enum { 238 DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS, 239 DRR_WRITE, DRR_FREE, DRR_END, DRR_WRITE_BYREF, 240 DRR_SPILL, DRR_WRITE_EMBEDDED, DRR_OBJECT_RANGE, DRR_REDACT, 241 DRR_NUMTYPES 242 } drr_type; 243 uint32_t drr_payloadlen; 244 union { 245 struct drr_begin drr_begin; 246 struct drr_end { 247 zio_cksum_t drr_checksum; 248 uint64_t drr_toguid; 249 } drr_end; 250 struct drr_object { 251 uint64_t drr_object; 252 dmu_object_type_t drr_type; 253 dmu_object_type_t drr_bonustype; 254 uint32_t drr_blksz; 255 uint32_t drr_bonuslen; 256 uint8_t drr_checksumtype; 257 uint8_t drr_compress; 258 uint8_t drr_dn_slots; 259 uint8_t drr_flags; 260 uint32_t drr_raw_bonuslen; 261 uint64_t drr_toguid; 262 /* only (possibly) nonzero for raw streams */ 263 uint8_t drr_indblkshift; 264 uint8_t drr_nlevels; 265 uint8_t drr_nblkptr; 266 uint8_t drr_pad[5]; 267 uint64_t drr_maxblkid; 268 /* bonus content follows */ 269 } drr_object; 270 struct drr_freeobjects { 271 uint64_t drr_firstobj; 272 uint64_t drr_numobjs; 273 uint64_t drr_toguid; 274 } drr_freeobjects; 275 struct drr_write { 276 uint64_t drr_object; 277 dmu_object_type_t drr_type; 278 uint32_t drr_pad; 279 uint64_t drr_offset; 280 uint64_t drr_logical_size; 281 uint64_t drr_toguid; 282 uint8_t drr_checksumtype; 283 uint8_t drr_flags; 284 uint8_t drr_compressiontype; 285 uint8_t drr_pad2[5]; 286 /* deduplication key */ 287 ddt_key_t drr_key; 288 /* only nonzero if drr_compressiontype is not 0 */ 289 uint64_t drr_compressed_size; 290 /* only nonzero for raw streams */ 291 uint8_t drr_salt[ZIO_DATA_SALT_LEN]; 292 uint8_t drr_iv[ZIO_DATA_IV_LEN]; 293 uint8_t drr_mac[ZIO_DATA_MAC_LEN]; 294 /* content follows */ 295 } drr_write; 296 struct drr_free { 297 uint64_t drr_object; 298 uint64_t drr_offset; 299 uint64_t drr_length; 300 uint64_t drr_toguid; 301 } drr_free; 302 struct drr_write_byref { 303 /* where to put the data */ 304 uint64_t drr_object; 305 uint64_t drr_offset; 306 uint64_t drr_length; 307 uint64_t drr_toguid; 308 /* where to find the prior copy of the data */ 309 uint64_t drr_refguid; 310 uint64_t drr_refobject; 311 uint64_t drr_refoffset; 312 /* properties of the data */ 313 uint8_t drr_checksumtype; 314 uint8_t drr_flags; 315 uint8_t drr_pad2[6]; 316 ddt_key_t drr_key; /* deduplication key */ 317 } drr_write_byref; 318 struct drr_spill { 319 uint64_t drr_object; 320 uint64_t drr_length; 321 uint64_t drr_toguid; 322 uint8_t drr_flags; 323 uint8_t drr_compressiontype; 324 uint8_t drr_pad[6]; 325 /* only nonzero for raw streams */ 326 uint64_t drr_compressed_size; 327 uint8_t drr_salt[ZIO_DATA_SALT_LEN]; 328 uint8_t drr_iv[ZIO_DATA_IV_LEN]; 329 uint8_t drr_mac[ZIO_DATA_MAC_LEN]; 330 dmu_object_type_t drr_type; 331 /* spill data follows */ 332 } drr_spill; 333 struct drr_write_embedded { 334 uint64_t drr_object; 335 uint64_t drr_offset; 336 /* logical length, should equal blocksize */ 337 uint64_t drr_length; 338 uint64_t drr_toguid; 339 uint8_t drr_compression; 340 uint8_t drr_etype; 341 uint8_t drr_pad[6]; 342 uint32_t drr_lsize; /* uncompressed size of payload */ 343 uint32_t drr_psize; /* compr. (real) size of payload */ 344 /* (possibly compressed) content follows */ 345 } drr_write_embedded; 346 struct drr_object_range { 347 uint64_t drr_firstobj; 348 uint64_t drr_numslots; 349 uint64_t drr_toguid; 350 uint8_t drr_salt[ZIO_DATA_SALT_LEN]; 351 uint8_t drr_iv[ZIO_DATA_IV_LEN]; 352 uint8_t drr_mac[ZIO_DATA_MAC_LEN]; 353 uint8_t drr_flags; 354 uint8_t drr_pad[3]; 355 } drr_object_range; 356 struct drr_redact { 357 uint64_t drr_object; 358 uint64_t drr_offset; 359 uint64_t drr_length; 360 uint64_t drr_toguid; 361 } drr_redact; 362 363 /* 364 * Note: drr_checksum is overlaid with all record types 365 * except DRR_BEGIN. Therefore its (non-pad) members 366 * must not overlap with members from the other structs. 367 * We accomplish this by putting its members at the very 368 * end of the struct. 369 */ 370 struct drr_checksum { 371 uint64_t drr_pad[34]; 372 /* 373 * fletcher-4 checksum of everything preceding the 374 * checksum. 375 */ 376 zio_cksum_t drr_checksum; 377 } drr_checksum; 378 } drr_u; 379 } dmu_replay_record_t; 380 381 /* diff record range types */ 382 typedef enum diff_type { 383 DDR_NONE = 0x1, 384 DDR_INUSE = 0x2, 385 DDR_FREE = 0x4 386 } diff_type_t; 387 388 /* 389 * The diff reports back ranges of free or in-use objects. 390 */ 391 typedef struct dmu_diff_record { 392 uint64_t ddr_type; 393 uint64_t ddr_first; 394 uint64_t ddr_last; 395 } dmu_diff_record_t; 396 397 typedef struct zinject_record { 398 uint64_t zi_objset; 399 uint64_t zi_object; 400 uint64_t zi_start; 401 uint64_t zi_end; 402 uint64_t zi_guid; 403 uint32_t zi_level; 404 uint32_t zi_error; 405 uint64_t zi_type; 406 uint32_t zi_freq; 407 uint32_t zi_failfast; 408 char zi_func[MAXNAMELEN]; 409 uint32_t zi_iotype; 410 int32_t zi_duration; 411 uint64_t zi_timer; 412 uint64_t zi_nlanes; 413 uint32_t zi_cmd; 414 uint32_t zi_dvas; 415 uint64_t zi_match_count; /* count of times matched */ 416 uint64_t zi_inject_count; /* count of times injected */ 417 } zinject_record_t; 418 419 #define ZINJECT_NULL 0x1 420 #define ZINJECT_FLUSH_ARC 0x2 421 #define ZINJECT_UNLOAD_SPA 0x4 422 #define ZINJECT_CALC_RANGE 0x8 423 424 #define ZEVENT_NONE 0x0 425 #define ZEVENT_NONBLOCK 0x1 426 #define ZEVENT_SIZE 1024 427 428 #define ZEVENT_SEEK_START 0 429 #define ZEVENT_SEEK_END UINT64_MAX 430 431 /* scaled frequency ranges */ 432 #define ZI_PERCENTAGE_MIN 4294UL 433 #define ZI_PERCENTAGE_MAX UINT32_MAX 434 435 #define ZI_NO_DVA (-1) 436 437 typedef enum zinject_type { 438 ZINJECT_UNINITIALIZED, 439 ZINJECT_DATA_FAULT, 440 ZINJECT_DEVICE_FAULT, 441 ZINJECT_LABEL_FAULT, 442 ZINJECT_IGNORED_WRITES, 443 ZINJECT_PANIC, 444 ZINJECT_DELAY_IO, 445 ZINJECT_DECRYPT_FAULT, 446 ZINJECT_DELAY_IMPORT, 447 ZINJECT_DELAY_EXPORT, 448 ZINJECT_DELAY_READY, 449 } zinject_type_t; 450 451 typedef enum zinject_iotype { 452 /* 453 * Compatibility: zi_iotype used to be set to ZIO_TYPE_, so make sure 454 * the corresponding ZINJECT_IOTYPE_ matches. Note that existing here 455 * does not mean that injections are possible for all these types. 456 */ 457 ZINJECT_IOTYPE_NULL = ZIO_TYPE_NULL, 458 ZINJECT_IOTYPE_READ = ZIO_TYPE_READ, 459 ZINJECT_IOTYPE_WRITE = ZIO_TYPE_WRITE, 460 ZINJECT_IOTYPE_FREE = ZIO_TYPE_FREE, 461 ZINJECT_IOTYPE_CLAIM = ZIO_TYPE_CLAIM, 462 ZINJECT_IOTYPE_FLUSH = ZIO_TYPE_FLUSH, 463 ZINJECT_IOTYPE_TRIM = ZIO_TYPE_TRIM, 464 ZINJECT_IOTYPE_ALL = ZIO_TYPES, 465 /* Room for future expansion for ZIO_TYPE_* */ 466 ZINJECT_IOTYPE_PROBE = 16, 467 ZINJECT_IOTYPES, 468 } zinject_iotype_t; 469 470 typedef struct zfs_share { 471 uint64_t z_exportdata; 472 uint64_t z_sharedata; 473 uint64_t z_sharetype; /* 0 = share, 1 = unshare */ 474 uint64_t z_sharemax; /* max length of share string */ 475 } zfs_share_t; 476 477 /* 478 * ZFS file systems may behave the usual, POSIX-compliant way, where 479 * name lookups are case-sensitive. They may also be set up so that 480 * all the name lookups are case-insensitive, or so that only some 481 * lookups, the ones that set an FIGNORECASE flag, are case-insensitive. 482 */ 483 typedef enum zfs_case { 484 ZFS_CASE_SENSITIVE, 485 ZFS_CASE_INSENSITIVE, 486 ZFS_CASE_MIXED 487 } zfs_case_t; 488 489 /* 490 * zfs ioctl command structure 491 */ 492 493 /* 494 * Note: this struct must have the same layout in 32-bit and 64-bit, so 495 * that 32-bit processes (like /sbin/zfs) can pass it to the 64-bit 496 * kernel. Therefore, we add padding to it so that no "hidden" padding 497 * is automatically added on 64-bit (but not on 32-bit). 498 */ 499 typedef struct zfs_cmd { 500 char zc_name[MAXPATHLEN]; /* name of pool or dataset */ 501 uint64_t zc_nvlist_src; /* really (char *) */ 502 uint64_t zc_nvlist_src_size; 503 uint64_t zc_nvlist_dst; /* really (char *) */ 504 uint64_t zc_nvlist_dst_size; 505 boolean_t zc_nvlist_dst_filled; /* put an nvlist in dst? */ 506 int zc_pad2; 507 508 /* 509 * The following members are for legacy ioctls which haven't been 510 * converted to the new method. 511 */ 512 uint64_t zc_history; /* really (char *) */ 513 char zc_value[MAXPATHLEN * 2]; 514 char zc_string[MAXNAMELEN]; 515 uint64_t zc_guid; 516 uint64_t zc_nvlist_conf; /* really (char *) */ 517 uint64_t zc_nvlist_conf_size; 518 uint64_t zc_cookie; 519 uint64_t zc_objset_type; 520 uint64_t zc_perm_action; 521 uint64_t zc_history_len; 522 uint64_t zc_history_offset; 523 uint64_t zc_obj; 524 uint64_t zc_iflags; /* internal to zfs(7fs) */ 525 zfs_share_t zc_share; 526 dmu_objset_stats_t zc_objset_stats; 527 struct drr_begin zc_begin_record; 528 529 /* 530 * zinject_record_t grew past its original size, which would push out 531 * the size of zfs_cmd_t. To adjust for this, we allow it to use the 532 * space after it, since those fields aren't used with ZFS_IOC_INJECT. 533 */ 534 union { 535 zinject_record_t zc_inject_record; 536 struct { 537 char zc_pad1[sizeof (zinject_record_t) - 16]; 538 uint32_t zc_defer_destroy; 539 uint32_t zc_flags; 540 uint64_t zc_action_handle; 541 }; 542 }; 543 544 int zc_cleanup_fd; 545 uint8_t zc_simple; 546 uint8_t zc_pad[3]; /* alignment */ 547 uint64_t zc_sendobj; 548 uint64_t zc_fromobj; 549 uint64_t zc_createtxg; 550 zfs_stat_t zc_stat; 551 uint64_t zc_zoneid; 552 } zfs_cmd_t; 553 554 /* 555 * zfs_cmd_t (and by extension, it's member structs) must always be the same 556 * size. Changing it will break compatibility between the kernel module and the 557 * userspace tools. 558 * 559 * This test is convoluted because MAXPATHLEN and MAXNAMELEN can vary across 560 * platforms. We include them directly here, which means it won't trip if those 561 * ever change, but if that happens we likely have other things to worry about. 562 */ 563 #define _expected_zfs_cmd_size ((MAXPATHLEN*3)+MAXNAMELEN+1200) 564 _Static_assert(sizeof (zfs_cmd_t) == _expected_zfs_cmd_size, 565 "zfs_cmd_t has wrong size"); 566 #undef _expected_zfs_cmd_size 567 568 typedef struct zfs_useracct { 569 char zu_domain[256]; 570 uid_t zu_rid; 571 uint32_t zu_pad; 572 uint64_t zu_space; 573 } zfs_useracct_t; 574 575 #define ZFSDEV_MAX_MINOR (1 << 16) 576 577 #define ZPOOL_EXPORT_AFTER_SPLIT 0x1 578 579 #ifdef _KERNEL 580 struct objset; 581 struct zfsvfs; 582 583 typedef struct zfs_creat { 584 nvlist_t *zct_zplprops; 585 nvlist_t *zct_props; 586 } zfs_creat_t; 587 588 extern int zfs_secpolicy_snapshot_perms(const char *, cred_t *); 589 extern int zfs_secpolicy_rename_perms(const char *, const char *, cred_t *); 590 extern int zfs_secpolicy_destroy_perms(const char *, cred_t *); 591 extern void zfs_unmount_snap(const char *); 592 extern void zfs_destroy_unmount_origin(const char *); 593 extern int getzfsvfs_impl(struct objset *, struct zfsvfs **); 594 extern int getzfsvfs(const char *, struct zfsvfs **); 595 596 enum zfsdev_state_type { 597 ZST_ONEXIT, 598 ZST_ZEVENT, 599 ZST_ALL, 600 }; 601 602 /* 603 * The zfsdev_state_t structure is managed as a singly-linked list 604 * from which items are never deleted. This allows for lock-free 605 * reading of the list so long as assignments to the zs_next and 606 * reads from zs_minor are performed atomically. Empty items are 607 * indicated by storing -1 into zs_minor. 608 */ 609 typedef struct zfsdev_state { 610 struct zfsdev_state *zs_next; /* next zfsdev_state_t link */ 611 minor_t zs_minor; /* made up minor number */ 612 void *zs_onexit; /* onexit data */ 613 void *zs_zevent; /* zevent data */ 614 } zfsdev_state_t; 615 616 extern void *zfsdev_get_state(minor_t minor, enum zfsdev_state_type which); 617 extern int zfsdev_getminor(zfs_file_t *fp, minor_t *minorp); 618 619 extern uint_t zfs_allow_log_key; 620 621 #endif /* _KERNEL */ 622 623 #ifdef __cplusplus 624 } 625 #endif 626 627 #endif /* _SYS_ZFS_IOCTL_H */ 628