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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
26 #ifndef _SYS_ZFS_IOCTL_H
27 #define _SYS_ZFS_IOCTL_H
32 #include <sys/dsl_deleg.h>
34 #include <sys/zfs_stat.h>
37 #include <sys/nvpair.h>
45 * The structures in this file are passed between userland and the
46 * kernel. Userland may be running a 32-bit process, while the kernel
47 * is 64-bit. Therefore, these structures need to compile the same in
48 * 32-bit and 64-bit. This means not using type "long", and adding
49 * explicit padding so that the 32-bit structure will not be packed more
50 * tightly than the 64-bit structure (which requires 64-bit alignment).
54 * Property values for snapdir
56 #define ZFS_SNAPDIR_HIDDEN 0
57 #define ZFS_SNAPDIR_VISIBLE 1
60 * Field manipulation macros for the drr_versioninfo field of the
65 * Header types for zfs send streams.
67 typedef enum drr_headertype {
69 DMU_COMPOUNDSTREAM = 0x2
72 #define DMU_GET_STREAM_HDRTYPE(vi) BF64_GET((vi), 0, 2)
73 #define DMU_SET_STREAM_HDRTYPE(vi, x) BF64_SET((vi), 0, 2, x)
75 #define DMU_GET_FEATUREFLAGS(vi) BF64_GET((vi), 2, 30)
76 #define DMU_SET_FEATUREFLAGS(vi, x) BF64_SET((vi), 2, 30, x)
79 * Feature flags for zfs send streams (flags in drr_versioninfo)
82 #define DMU_BACKUP_FEATURE_DEDUP (1 << 0)
83 #define DMU_BACKUP_FEATURE_DEDUPPROPS (1 << 1)
84 #define DMU_BACKUP_FEATURE_SA_SPILL (1 << 2)
85 /* flags #3 - #15 are reserved for incompatible closed-source implementations */
86 #define DMU_BACKUP_FEATURE_EMBED_DATA (1 << 16)
87 #define DMU_BACKUP_FEATURE_EMBED_DATA_LZ4 (1 << 17)
88 /* flag #18 is reserved for a Delphix feature */
89 #define DMU_BACKUP_FEATURE_LARGE_BLOCKS (1 << 19)
90 #define DMU_BACKUP_FEATURE_RESUMING (1 << 20)
93 * Mask of all supported backup features
95 #define DMU_BACKUP_FEATURE_MASK (DMU_BACKUP_FEATURE_DEDUP | \
96 DMU_BACKUP_FEATURE_DEDUPPROPS | DMU_BACKUP_FEATURE_SA_SPILL | \
97 DMU_BACKUP_FEATURE_EMBED_DATA | DMU_BACKUP_FEATURE_EMBED_DATA_LZ4 | \
98 DMU_BACKUP_FEATURE_RESUMING | \
99 DMU_BACKUP_FEATURE_LARGE_BLOCKS)
101 /* Are all features in the given flag word currently supported? */
102 #define DMU_STREAM_SUPPORTED(x) (!((x) & ~DMU_BACKUP_FEATURE_MASK))
104 typedef enum dmu_send_resume_token_version {
105 ZFS_SEND_RESUME_TOKEN_VERSION = 1
106 } dmu_send_resume_token_version_t;
109 * The drr_versioninfo field of the dmu_replay_record has the
112 * 64 56 48 40 32 24 16 8 0
113 * +-------+-------+-------+-------+-------+-------+-------+-------+
114 * | reserved | feature-flags |C|S|
115 * +-------+-------+-------+-------+-------+-------+-------+-------+
117 * The low order two bits indicate the header type: SUBSTREAM (0x1)
118 * or COMPOUNDSTREAM (0x2). Using two bits for this is historical:
119 * this field used to be a version number, where the two version types
120 * were 1 and 2. Using two bits for this allows earlier versions of
121 * the code to be able to recognize send streams that don't use any
122 * of the features indicated by feature flags.
125 #define DMU_BACKUP_MAGIC 0x2F5bacbacULL
127 #define DRR_FLAG_CLONE (1<<0)
128 #define DRR_FLAG_CI_DATA (1<<1)
130 * This send stream, if it is a full send, includes the FREE and FREEOBJECT
131 * records that are created by the sending process. This means that the send
132 * stream can be received as a clone, even though it is not an incremental.
133 * This is not implemented as a feature flag, because the receiving side does
134 * not need to have implemented it to receive this stream; it is fully backwards
135 * compatible. We need a flag, though, because full send streams without it
136 * cannot necessarily be received as a clone correctly.
138 #define DRR_FLAG_FREERECORDS (1<<2)
141 * flags in the drr_checksumflags field in the DRR_WRITE and
142 * DRR_WRITE_BYREF blocks
144 #define DRR_CHECKSUM_DEDUP (1<<0)
146 #define DRR_IS_DEDUP_CAPABLE(flags) ((flags) & DRR_CHECKSUM_DEDUP)
149 * zfs ioctl command structure
153 uint64_t drr_versioninfo; /* was drr_version */
154 uint64_t drr_creation_time;
155 dmu_objset_type_t drr_type;
158 uint64_t drr_fromguid;
159 char drr_toname[MAXNAMELEN];
163 zio_cksum_t drr_checksum;
169 dmu_object_type_t drr_type;
170 dmu_object_type_t drr_bonustype;
172 uint32_t drr_bonuslen;
173 uint8_t drr_checksumtype;
174 uint8_t drr_compress;
177 /* bonus content follows */
180 struct drr_freeobjects {
181 uint64_t drr_firstobj;
182 uint64_t drr_numobjs;
188 dmu_object_type_t drr_type;
193 uint8_t drr_checksumtype;
194 uint8_t drr_checksumflags;
196 ddt_key_t drr_key; /* deduplication key */
197 /* content follows */
207 struct drr_write_byref {
208 /* where to put the data */
213 /* where to find the prior copy of the data */
214 uint64_t drr_refguid;
215 uint64_t drr_refobject;
216 uint64_t drr_refoffset;
217 /* properties of the data */
218 uint8_t drr_checksumtype;
219 uint8_t drr_checksumflags;
221 ddt_key_t drr_key; /* deduplication key */
228 uint64_t drr_pad[4]; /* needed for crypto */
229 /* spill data follows */
232 typedef struct dmu_replay_record {
234 DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS,
235 DRR_WRITE, DRR_FREE, DRR_END, DRR_WRITE_BYREF,
236 DRR_SPILL, DRR_WRITE_EMBEDDED, DRR_NUMTYPES
238 uint32_t drr_payloadlen;
240 struct drr_begin drr_begin;
241 struct drr_end drr_end;
242 struct drr_object drr_object;
243 struct drr_freeobjects drr_freeobjects;
244 struct drr_write drr_write;
245 struct drr_free drr_free;
246 struct drr_write_byref drr_write_byref;
247 struct drr_spill drr_spill;
248 struct drr_write_embedded {
251 /* logical length, should equal blocksize */
254 uint8_t drr_compression;
257 uint32_t drr_lsize; /* uncompressed size of payload */
258 uint32_t drr_psize; /* compr. (real) size of payload */
259 /* (possibly compressed) content follows */
260 } drr_write_embedded;
263 * Nore: drr_checksum is overlaid with all record types
264 * except DRR_BEGIN. Therefore its (non-pad) members
265 * must not overlap with members from the other structs.
266 * We accomplish this by putting its members at the very
269 struct drr_checksum {
270 uint64_t drr_pad[34];
272 * fletcher-4 checksum of everything preceding the
275 zio_cksum_t drr_checksum;
278 } dmu_replay_record_t;
280 /* diff record range types */
281 typedef enum diff_type {
288 * The diff reports back ranges of free or in-use objects.
290 typedef struct dmu_diff_record {
296 typedef struct zinject_record {
306 uint32_t zi_failfast;
307 char zi_func[MAXNAMELEN];
316 #define ZINJECT_NULL 0x1
317 #define ZINJECT_FLUSH_ARC 0x2
318 #define ZINJECT_UNLOAD_SPA 0x4
320 typedef enum zinject_type {
321 ZINJECT_UNINITIALIZED,
323 ZINJECT_DEVICE_FAULT,
325 ZINJECT_IGNORED_WRITES,
330 typedef struct zfs_share {
331 uint64_t z_exportdata;
332 uint64_t z_sharedata;
333 uint64_t z_sharetype; /* 0 = share, 1 = unshare */
334 uint64_t z_sharemax; /* max length of share string */
338 * ZFS file systems may behave the usual, POSIX-compliant way, where
339 * name lookups are case-sensitive. They may also be set up so that
340 * all the name lookups are case-insensitive, or so that only some
341 * lookups, the ones that set an FIGNORECASE flag, are case-insensitive.
343 typedef enum zfs_case {
345 ZFS_CASE_INSENSITIVE,
349 typedef struct zfs_cmd {
350 char zc_name[MAXPATHLEN]; /* name of pool or dataset */
351 uint64_t zc_nvlist_src; /* really (char *) */
352 uint64_t zc_nvlist_src_size;
353 uint64_t zc_nvlist_dst; /* really (char *) */
354 uint64_t zc_nvlist_dst_size;
355 boolean_t zc_nvlist_dst_filled; /* put an nvlist in dst? */
359 * The following members are for legacy ioctls which haven't been
360 * converted to the new method.
362 uint64_t zc_history; /* really (char *) */
363 char zc_value[MAXPATHLEN * 2];
364 char zc_string[MAXNAMELEN];
366 uint64_t zc_nvlist_conf; /* really (char *) */
367 uint64_t zc_nvlist_conf_size;
369 uint64_t zc_objset_type;
370 uint64_t zc_perm_action;
371 uint64_t zc_history_len;
372 uint64_t zc_history_offset;
374 uint64_t zc_iflags; /* internal to zfs(7fs) */
375 zfs_share_t zc_share;
377 dmu_objset_stats_t zc_objset_stats;
378 dmu_replay_record_t zc_begin_record;
379 zinject_record_t zc_inject_record;
380 uint32_t zc_defer_destroy;
382 uint64_t zc_action_handle;
385 boolean_t zc_resumable;
388 uint64_t zc_createtxg;
392 typedef struct zfs_useracct {
399 #define ZFSDEV_MAX_MINOR (1 << 16)
400 #define ZFS_MIN_MINOR (ZFSDEV_MAX_MINOR + 1)
402 #define ZPOOL_EXPORT_AFTER_SPLIT 0x1
406 typedef struct zfs_creat {
407 nvlist_t *zct_zplprops;
411 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
412 extern int zfs_secpolicy_rename_perms(const char *from,
413 const char *to, cred_t *cr);
414 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
415 extern int zfs_busy(void);
416 extern int zfs_unmount_snap(const char *);
417 extern void zfs_destroy_unmount_origin(const char *);
420 * ZFS minor numbers can refer to either a control device instance or
421 * a zvol. Depending on the value of zss_type, zss_data points to either
422 * a zvol_state_t or a zfs_onexit_t.
424 enum zfs_soft_state_type {
429 typedef struct zfs_soft_state {
430 enum zfs_soft_state_type zss_type;
434 extern void *zfsdev_get_soft_state(minor_t minor,
435 enum zfs_soft_state_type which);
436 extern minor_t zfsdev_minor_alloc(void);
438 extern void *zfsdev_state;
446 #endif /* _SYS_ZFS_IOCTL_H */