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) 2011-2012 Pawel Jakub Dawidek. All rights reserved. 24 * Copyright (c) 2012, 2017 by Delphix. All rights reserved. 25 * Copyright 2016 RackTop Systems. 26 * Copyright (c) 2014 Integros [integros.com] 27 */ 28 29 #ifndef _SYS_ZFS_IOCTL_H 30 #define _SYS_ZFS_IOCTL_H 31 32 #include <sys/cred.h> 33 #include <sys/dmu.h> 34 #include <sys/zio.h> 35 #include <sys/dsl_deleg.h> 36 #include <sys/spa.h> 37 #include <sys/zfs_stat.h> 38 39 #ifdef _KERNEL 40 #include <sys/nvpair.h> 41 #endif /* _KERNEL */ 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 /* 48 * The structures in this file are passed between userland and the 49 * kernel. Userland may be running a 32-bit process, while the kernel 50 * is 64-bit. Therefore, these structures need to compile the same in 51 * 32-bit and 64-bit. This means not using type "long", and adding 52 * explicit padding so that the 32-bit structure will not be packed more 53 * tightly than the 64-bit structure (which requires 64-bit alignment). 54 */ 55 56 /* 57 * Property values for snapdir 58 */ 59 #define ZFS_SNAPDIR_HIDDEN 0 60 #define ZFS_SNAPDIR_VISIBLE 1 61 62 /* 63 * Field manipulation macros for the drr_versioninfo field of the 64 * send stream header. 65 */ 66 67 /* 68 * Header types for zfs send streams. 69 */ 70 typedef enum drr_headertype { 71 DMU_SUBSTREAM = 0x1, 72 DMU_COMPOUNDSTREAM = 0x2 73 } drr_headertype_t; 74 75 #define DMU_GET_STREAM_HDRTYPE(vi) BF64_GET((vi), 0, 2) 76 #define DMU_SET_STREAM_HDRTYPE(vi, x) BF64_SET((vi), 0, 2, x) 77 78 #define DMU_GET_FEATUREFLAGS(vi) BF64_GET((vi), 2, 30) 79 #define DMU_SET_FEATUREFLAGS(vi, x) BF64_SET((vi), 2, 30, x) 80 81 /* 82 * Feature flags for zfs send streams (flags in drr_versioninfo) 83 */ 84 85 #define DMU_BACKUP_FEATURE_DEDUP (1 << 0) 86 #define DMU_BACKUP_FEATURE_DEDUPPROPS (1 << 1) 87 #define DMU_BACKUP_FEATURE_SA_SPILL (1 << 2) 88 /* flags #3 - #15 are reserved for incompatible closed-source implementations */ 89 #define DMU_BACKUP_FEATURE_EMBED_DATA (1 << 16) 90 #define DMU_BACKUP_FEATURE_LZ4 (1 << 17) 91 /* flag #18 is reserved for a Delphix feature */ 92 #define DMU_BACKUP_FEATURE_LARGE_BLOCKS (1 << 19) 93 #define DMU_BACKUP_FEATURE_RESUMING (1 << 20) 94 /* flag #21 is reserved for the redacted send/receive feature */ 95 #define DMU_BACKUP_FEATURE_COMPRESSED (1 << 22) 96 #define DMU_BACKUP_FEATURE_LARGE_DNODE (1 << 23) 97 #define DMU_BACKUP_FEATURE_RAW (1 << 24) 98 /* flag #25 is reserved for the ZSTD compression feature */ 99 #define DMU_BACKUP_FEATURE_HOLDS (1 << 26) 100 101 /* 102 * Mask of all supported backup features 103 */ 104 #define DMU_BACKUP_FEATURE_MASK (DMU_BACKUP_FEATURE_DEDUP | \ 105 DMU_BACKUP_FEATURE_DEDUPPROPS | DMU_BACKUP_FEATURE_SA_SPILL | \ 106 DMU_BACKUP_FEATURE_EMBED_DATA | DMU_BACKUP_FEATURE_LZ4 | \ 107 DMU_BACKUP_FEATURE_RESUMING | DMU_BACKUP_FEATURE_LARGE_BLOCKS | \ 108 DMU_BACKUP_FEATURE_COMPRESSED | DMU_BACKUP_FEATURE_LARGE_DNODE | \ 109 DMU_BACKUP_FEATURE_RAW | DMU_BACKUP_FEATURE_HOLDS) 110 111 /* Are all features in the given flag word currently supported? */ 112 #define DMU_STREAM_SUPPORTED(x) (!((x) & ~DMU_BACKUP_FEATURE_MASK)) 113 114 typedef enum dmu_send_resume_token_version { 115 ZFS_SEND_RESUME_TOKEN_VERSION = 1 116 } dmu_send_resume_token_version_t; 117 118 /* 119 * The drr_versioninfo field of the dmu_replay_record has the 120 * following layout: 121 * 122 * 64 56 48 40 32 24 16 8 0 123 * +-------+-------+-------+-------+-------+-------+-------+-------+ 124 * | reserved | feature-flags |C|S| 125 * +-------+-------+-------+-------+-------+-------+-------+-------+ 126 * 127 * The low order two bits indicate the header type: SUBSTREAM (0x1) 128 * or COMPOUNDSTREAM (0x2). Using two bits for this is historical: 129 * this field used to be a version number, where the two version types 130 * were 1 and 2. Using two bits for this allows earlier versions of 131 * the code to be able to recognize send streams that don't use any 132 * of the features indicated by feature flags. 133 */ 134 135 #define DMU_BACKUP_MAGIC 0x2F5bacbacULL 136 137 /* 138 * Send stream flags. Bits 24-31 are reserved for vendor-specific 139 * implementations and should not be used. 140 */ 141 #define DRR_FLAG_CLONE (1<<0) 142 #define DRR_FLAG_CI_DATA (1<<1) 143 /* 144 * This send stream, if it is a full send, includes the FREE and FREEOBJECT 145 * records that are created by the sending process. This means that the send 146 * stream can be received as a clone, even though it is not an incremental. 147 * This is not implemented as a feature flag, because the receiving side does 148 * not need to have implemented it to receive this stream; it is fully backwards 149 * compatible. We need a flag, though, because full send streams without it 150 * cannot necessarily be received as a clone correctly. 151 */ 152 #define DRR_FLAG_FREERECORDS (1<<2) 153 /* 154 * When DRR_FLAG_SPILL_BLOCK is set it indicates the DRR_OBJECT_SPILL 155 * and DRR_SPILL_UNMODIFIED flags are meaningful in the send stream. 156 * 157 * When DRR_FLAG_SPILL_BLOCK is set, DRR_OBJECT records will have 158 * DRR_OBJECT_SPILL set if and only if they should have a spill block 159 * (either an existing one, or a new one in the send stream). When clear 160 * the object does not have a spill block and any existing spill block 161 * should be freed. 162 * 163 * Similarly, when DRR_FLAG_SPILL_BLOCK is set, DRR_SPILL records will 164 * have DRR_SPILL_UNMODIFIED set if and only if they were included for 165 * backward compatibility purposes, and can be safely ignored by new versions 166 * of zfs receive. Previous versions of ZFS which do not understand the 167 * DRR_FLAG_SPILL_BLOCK will process this record and recreate any missing 168 * spill blocks. 169 */ 170 #define DRR_FLAG_SPILL_BLOCK (1<<3) 171 172 /* 173 * flags in the drr_flags field in the DRR_WRITE, DRR_SPILL, DRR_OBJECT, 174 * DRR_WRITE_BYREF, and DRR_OBJECT_RANGE blocks 175 */ 176 #define DRR_CHECKSUM_DEDUP (1<<0) /* not used for SPILL records */ 177 #define DRR_RAW_BYTESWAP (1<<1) 178 #define DRR_OBJECT_SPILL (1<<2) /* OBJECT record has a spill block */ 179 #define DRR_SPILL_UNMODIFIED (1<<2) /* SPILL record for unmodified block */ 180 181 #define DRR_IS_DEDUP_CAPABLE(flags) ((flags) & DRR_CHECKSUM_DEDUP) 182 #define DRR_IS_RAW_BYTESWAPPED(flags) ((flags) & DRR_RAW_BYTESWAP) 183 #define DRR_OBJECT_HAS_SPILL(flags) ((flags) & DRR_OBJECT_SPILL) 184 #define DRR_SPILL_IS_UNMODIFIED(flags) ((flags) & DRR_SPILL_UNMODIFIED) 185 186 /* deal with compressed drr_write replay records */ 187 #define DRR_WRITE_COMPRESSED(drrw) ((drrw)->drr_compressiontype != 0) 188 #define DRR_WRITE_PAYLOAD_SIZE(drrw) \ 189 (DRR_WRITE_COMPRESSED(drrw) ? (drrw)->drr_compressed_size : \ 190 (drrw)->drr_logical_size) 191 #define DRR_SPILL_PAYLOAD_SIZE(drrs) \ 192 ((drrs)->drr_compressed_size ? \ 193 (drrs)->drr_compressed_size : (drrs)->drr_length) 194 #define DRR_OBJECT_PAYLOAD_SIZE(drro) \ 195 ((drro)->drr_raw_bonuslen != 0 ? \ 196 (drro)->drr_raw_bonuslen : P2ROUNDUP((drro)->drr_bonuslen, 8)) 197 198 /* 199 * zfs ioctl command structure 200 */ 201 typedef struct dmu_replay_record { 202 enum { 203 DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS, 204 DRR_WRITE, DRR_FREE, DRR_END, DRR_WRITE_BYREF, 205 DRR_SPILL, DRR_WRITE_EMBEDDED, DRR_OBJECT_RANGE, 206 DRR_NUMTYPES 207 } drr_type; 208 uint32_t drr_payloadlen; 209 union { 210 struct drr_begin { 211 uint64_t drr_magic; 212 uint64_t drr_versioninfo; /* was drr_version */ 213 uint64_t drr_creation_time; 214 dmu_objset_type_t drr_type; 215 uint32_t drr_flags; 216 uint64_t drr_toguid; 217 uint64_t drr_fromguid; 218 char drr_toname[MAXNAMELEN]; 219 } drr_begin; 220 struct drr_end { 221 zio_cksum_t drr_checksum; 222 uint64_t drr_toguid; 223 } drr_end; 224 struct drr_object { 225 uint64_t drr_object; 226 dmu_object_type_t drr_type; 227 dmu_object_type_t drr_bonustype; 228 uint32_t drr_blksz; 229 uint32_t drr_bonuslen; 230 uint8_t drr_checksumtype; 231 uint8_t drr_compress; 232 uint8_t drr_dn_slots; 233 uint8_t drr_flags; 234 uint32_t drr_raw_bonuslen; 235 uint64_t drr_toguid; 236 /* only (possibly) nonzero for raw streams */ 237 uint8_t drr_indblkshift; 238 uint8_t drr_nlevels; 239 uint8_t drr_nblkptr; 240 uint8_t drr_pad[5]; 241 uint64_t drr_maxblkid; 242 /* bonus content follows */ 243 } drr_object; 244 struct drr_freeobjects { 245 uint64_t drr_firstobj; 246 uint64_t drr_numobjs; 247 uint64_t drr_toguid; 248 } drr_freeobjects; 249 struct drr_write { 250 uint64_t drr_object; 251 dmu_object_type_t drr_type; 252 uint32_t drr_pad; 253 uint64_t drr_offset; 254 uint64_t drr_logical_size; 255 uint64_t drr_toguid; 256 uint8_t drr_checksumtype; 257 uint8_t drr_flags; 258 uint8_t drr_compressiontype; 259 uint8_t drr_pad2[5]; 260 /* deduplication key */ 261 ddt_key_t drr_key; 262 /* only nonzero if drr_compressiontype is not 0 */ 263 uint64_t drr_compressed_size; 264 /* only nonzero for raw streams */ 265 uint8_t drr_salt[ZIO_DATA_SALT_LEN]; 266 uint8_t drr_iv[ZIO_DATA_IV_LEN]; 267 uint8_t drr_mac[ZIO_DATA_MAC_LEN]; 268 /* content follows */ 269 } drr_write; 270 struct drr_free { 271 uint64_t drr_object; 272 uint64_t drr_offset; 273 uint64_t drr_length; 274 uint64_t drr_toguid; 275 } drr_free; 276 struct drr_write_byref { 277 /* where to put the data */ 278 uint64_t drr_object; 279 uint64_t drr_offset; 280 uint64_t drr_length; 281 uint64_t drr_toguid; 282 /* where to find the prior copy of the data */ 283 uint64_t drr_refguid; 284 uint64_t drr_refobject; 285 uint64_t drr_refoffset; 286 /* properties of the data */ 287 uint8_t drr_checksumtype; 288 uint8_t drr_flags; 289 uint8_t drr_pad2[6]; 290 ddt_key_t drr_key; /* deduplication key */ 291 } drr_write_byref; 292 struct drr_spill { 293 uint64_t drr_object; 294 uint64_t drr_length; 295 uint64_t drr_toguid; 296 uint8_t drr_flags; 297 uint8_t drr_compressiontype; 298 uint8_t drr_pad[6]; 299 /* only nonzero for raw streams */ 300 uint64_t drr_compressed_size; 301 uint8_t drr_salt[ZIO_DATA_SALT_LEN]; 302 uint8_t drr_iv[ZIO_DATA_IV_LEN]; 303 uint8_t drr_mac[ZIO_DATA_MAC_LEN]; 304 dmu_object_type_t drr_type; 305 /* spill data follows */ 306 } drr_spill; 307 struct drr_write_embedded { 308 uint64_t drr_object; 309 uint64_t drr_offset; 310 /* logical length, should equal blocksize */ 311 uint64_t drr_length; 312 uint64_t drr_toguid; 313 uint8_t drr_compression; 314 uint8_t drr_etype; 315 uint8_t drr_pad[6]; 316 uint32_t drr_lsize; /* uncompressed size of payload */ 317 uint32_t drr_psize; /* compr. (real) size of payload */ 318 /* (possibly compressed) content follows */ 319 } drr_write_embedded; 320 struct drr_object_range { 321 uint64_t drr_firstobj; 322 uint64_t drr_numslots; 323 uint64_t drr_toguid; 324 uint8_t drr_salt[ZIO_DATA_SALT_LEN]; 325 uint8_t drr_iv[ZIO_DATA_IV_LEN]; 326 uint8_t drr_mac[ZIO_DATA_MAC_LEN]; 327 uint8_t drr_flags; 328 uint8_t drr_pad[3]; 329 } drr_object_range; 330 331 /* 332 * Nore: drr_checksum is overlaid with all record types 333 * except DRR_BEGIN. Therefore its (non-pad) members 334 * must not overlap with members from the other structs. 335 * We accomplish this by putting its members at the very 336 * end of the struct. 337 */ 338 struct drr_checksum { 339 uint64_t drr_pad[34]; 340 /* 341 * fletcher-4 checksum of everything preceding the 342 * checksum. 343 */ 344 zio_cksum_t drr_checksum; 345 } drr_checksum; 346 } drr_u; 347 } dmu_replay_record_t; 348 349 /* diff record range types */ 350 typedef enum diff_type { 351 DDR_NONE = 0x1, 352 DDR_INUSE = 0x2, 353 DDR_FREE = 0x4 354 } diff_type_t; 355 356 /* 357 * The diff reports back ranges of free or in-use objects. 358 */ 359 typedef struct dmu_diff_record { 360 uint64_t ddr_type; 361 uint64_t ddr_first; 362 uint64_t ddr_last; 363 } dmu_diff_record_t; 364 365 typedef struct zinject_record { 366 uint64_t zi_objset; 367 uint64_t zi_object; 368 uint64_t zi_start; 369 uint64_t zi_end; 370 uint64_t zi_guid; 371 uint32_t zi_level; 372 uint32_t zi_error; 373 uint64_t zi_type; 374 uint32_t zi_freq; 375 uint32_t zi_failfast; 376 char zi_func[MAXNAMELEN]; 377 uint32_t zi_iotype; 378 int32_t zi_duration; 379 uint64_t zi_timer; 380 uint64_t zi_nlanes; 381 uint32_t zi_cmd; 382 uint32_t zi_dvas; 383 } zinject_record_t; 384 385 #define ZINJECT_NULL 0x1 386 #define ZINJECT_FLUSH_ARC 0x2 387 #define ZINJECT_UNLOAD_SPA 0x4 388 389 #define ZI_NO_DVA (-1) 390 391 typedef enum zinject_type { 392 ZINJECT_UNINITIALIZED, 393 ZINJECT_DATA_FAULT, 394 ZINJECT_DEVICE_FAULT, 395 ZINJECT_LABEL_FAULT, 396 ZINJECT_IGNORED_WRITES, 397 ZINJECT_PANIC, 398 ZINJECT_DELAY_IO, 399 ZINJECT_DECRYPT_FAULT, 400 } zinject_type_t; 401 402 typedef struct zfs_share { 403 uint64_t z_exportdata; 404 uint64_t z_sharedata; 405 uint64_t z_sharetype; /* 0 = share, 1 = unshare */ 406 uint64_t z_sharemax; /* max length of share string */ 407 } zfs_share_t; 408 409 /* 410 * ZFS file systems may behave the usual, POSIX-compliant way, where 411 * name lookups are case-sensitive. They may also be set up so that 412 * all the name lookups are case-insensitive, or so that only some 413 * lookups, the ones that set an FIGNORECASE flag, are case-insensitive. 414 */ 415 typedef enum zfs_case { 416 ZFS_CASE_SENSITIVE, 417 ZFS_CASE_INSENSITIVE, 418 ZFS_CASE_MIXED 419 } zfs_case_t; 420 421 /* 422 * Note: this struct must have the same layout in 32-bit and 64-bit, so 423 * that 32-bit processes (like /sbin/zfs) can pass it to the 64-bit 424 * kernel. Therefore, we add padding to it so that no "hidden" padding 425 * is automatically added on 64-bit (but not on 32-bit). 426 */ 427 typedef struct zfs_cmd { 428 char zc_name[MAXPATHLEN]; /* name of pool or dataset */ 429 uint64_t zc_nvlist_src; /* really (char *) */ 430 uint64_t zc_nvlist_src_size; 431 uint64_t zc_nvlist_dst; /* really (char *) */ 432 uint64_t zc_nvlist_dst_size; 433 boolean_t zc_nvlist_dst_filled; /* put an nvlist in dst? */ 434 int zc_pad2; 435 436 /* 437 * The following members are for legacy ioctls which haven't been 438 * converted to the new method. 439 */ 440 uint64_t zc_history; /* really (char *) */ 441 char zc_value[MAXPATHLEN * 2]; 442 char zc_string[MAXNAMELEN]; 443 uint64_t zc_guid; 444 uint64_t zc_nvlist_conf; /* really (char *) */ 445 uint64_t zc_nvlist_conf_size; 446 uint64_t zc_cookie; 447 uint64_t zc_objset_type; 448 uint64_t zc_perm_action; 449 uint64_t zc_history_len; 450 uint64_t zc_history_offset; 451 uint64_t zc_obj; 452 uint64_t zc_iflags; /* internal to zfs(7fs) */ 453 zfs_share_t zc_share; 454 dmu_objset_stats_t zc_objset_stats; 455 dmu_replay_record_t zc_begin_record; 456 zinject_record_t zc_inject_record; 457 uint32_t zc_defer_destroy; 458 uint32_t zc_flags; 459 uint64_t zc_action_handle; 460 int zc_cleanup_fd; 461 uint8_t zc_simple; 462 uint8_t zc_pad3[3]; 463 boolean_t zc_resumable; 464 uint32_t zc_pad4; 465 uint64_t zc_sendobj; 466 uint64_t zc_fromobj; 467 uint64_t zc_createtxg; 468 zfs_stat_t zc_stat; 469 } zfs_cmd_t; 470 471 typedef struct zfs_useracct { 472 char zu_domain[256]; 473 uid_t zu_rid; 474 uint32_t zu_pad; 475 uint64_t zu_space; 476 } zfs_useracct_t; 477 478 #define ZFSDEV_MAX_MINOR (1 << 16) 479 #define ZFS_MIN_MINOR (ZFSDEV_MAX_MINOR + 1) 480 481 #define ZPOOL_EXPORT_AFTER_SPLIT 0x1 482 483 #ifdef _KERNEL 484 struct objset; 485 struct zfsvfs; 486 487 typedef struct zfs_creat { 488 nvlist_t *zct_zplprops; 489 nvlist_t *zct_props; 490 } zfs_creat_t; 491 492 extern dev_info_t *zfs_dip; 493 494 extern int zfs_secpolicy_snapshot_perms(const char *, cred_t *); 495 extern int zfs_secpolicy_rename_perms(const char *, const char *, cred_t *); 496 extern int zfs_secpolicy_destroy_perms(const char *, cred_t *); 497 extern int zfs_busy(void); 498 extern void zfs_unmount_snap(const char *); 499 extern void zfs_destroy_unmount_origin(const char *); 500 extern int getzfsvfs_impl(struct objset *, struct zfsvfs **); 501 extern int getzfsvfs(const char *, struct zfsvfs **); 502 503 /* 504 * ZFS minor numbers can refer to either a control device instance or 505 * a zvol. Depending on the value of zss_type, zss_data points to either 506 * a zvol_state_t or a zfs_onexit_t. 507 */ 508 enum zfs_soft_state_type { 509 ZSST_ZVOL, 510 ZSST_CTLDEV 511 }; 512 513 typedef struct zfs_soft_state { 514 enum zfs_soft_state_type zss_type; 515 void *zss_data; 516 } zfs_soft_state_t; 517 518 extern void *zfsdev_get_soft_state(minor_t minor, 519 enum zfs_soft_state_type which); 520 extern minor_t zfsdev_minor_alloc(void); 521 522 extern void *zfsdev_state; 523 extern kmutex_t zfsdev_state_lock; 524 525 #endif /* _KERNEL */ 526 527 #ifdef __cplusplus 528 } 529 #endif 530 531 #endif /* _SYS_ZFS_IOCTL_H */ 532