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 by Delphix. All rights reserved.
  24  */
  25 
  26 #ifndef _SYS_ZFS_IOCTL_H
  27 #define _SYS_ZFS_IOCTL_H
  28 
  29 #include <sys/cred.h>
  30 #include <sys/dmu.h>
  31 #include <sys/zio.h>
  32 #include <sys/dsl_deleg.h>
  33 #include <sys/spa.h>
  34 #include <sys/zfs_stat.h>
  35 
  36 #ifdef _KERNEL
  37 #include <sys/nvpair.h>
  38 #endif  /* _KERNEL */
  39 
  40 #ifdef  __cplusplus
  41 extern "C" {
  42 #endif
  43 
  44 /*
  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).
  51  */
  52 
  53 /*
  54  * Property values for snapdir
  55  */
  56 #define ZFS_SNAPDIR_HIDDEN              0
  57 #define ZFS_SNAPDIR_VISIBLE             1
  58 
  59 /*
  60  * Field manipulation macros for the drr_versioninfo field of the
  61  * send stream header.
  62  */
  63 
  64 /*
  65  * Header types for zfs send streams.
  66  */
  67 typedef enum drr_headertype {
  68         DMU_SUBSTREAM = 0x1,
  69         DMU_COMPOUNDSTREAM = 0x2
  70 } drr_headertype_t;
  71 
  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)
  74 
  75 #define DMU_GET_FEATUREFLAGS(vi)        BF64_GET((vi), 2, 30)
  76 #define DMU_SET_FEATUREFLAGS(vi, x)     BF64_SET((vi), 2, 30, x)
  77 
  78 /*
  79  * Feature flags for zfs send streams (flags in drr_versioninfo)
  80  */
  81 
  82 #define DMU_BACKUP_FEATURE_DEDUP        (0x1)
  83 #define DMU_BACKUP_FEATURE_DEDUPPROPS   (0x2)
  84 #define DMU_BACKUP_FEATURE_SA_SPILL     (0x4)
  85 
  86 /*
  87  * Mask of all supported backup features
  88  */
  89 #define DMU_BACKUP_FEATURE_MASK (DMU_BACKUP_FEATURE_DEDUP | \
  90                 DMU_BACKUP_FEATURE_DEDUPPROPS | DMU_BACKUP_FEATURE_SA_SPILL)
  91 
  92 /* Are all features in the given flag word currently supported? */
  93 #define DMU_STREAM_SUPPORTED(x) (!((x) & ~DMU_BACKUP_FEATURE_MASK))
  94 
  95 /*
  96  * The drr_versioninfo field of the dmu_replay_record has the
  97  * following layout:
  98  *
  99  *      64      56      48      40      32      24      16      8       0
 100  *      +-------+-------+-------+-------+-------+-------+-------+-------+
 101  *      |               reserved        |        feature-flags      |C|S|
 102  *      +-------+-------+-------+-------+-------+-------+-------+-------+
 103  *
 104  * The low order two bits indicate the header type: SUBSTREAM (0x1)
 105  * or COMPOUNDSTREAM (0x2).  Using two bits for this is historical:
 106  * this field used to be a version number, where the two version types
 107  * were 1 and 2.  Using two bits for this allows earlier versions of
 108  * the code to be able to recognize send streams that don't use any
 109  * of the features indicated by feature flags.
 110  */
 111 
 112 #define DMU_BACKUP_MAGIC 0x2F5bacbacULL
 113 
 114 #define DRR_FLAG_CLONE          (1<<0)
 115 #define DRR_FLAG_CI_DATA        (1<<1)
 116 
 117 /*
 118  * flags in the drr_checksumflags field in the DRR_WRITE and
 119  * DRR_WRITE_BYREF blocks
 120  */
 121 #define DRR_CHECKSUM_DEDUP      (1<<0)
 122 
 123 #define DRR_IS_DEDUP_CAPABLE(flags)     ((flags) & DRR_CHECKSUM_DEDUP)
 124 
 125 /*
 126  * zfs ioctl command structure
 127  */
 128 typedef struct dmu_replay_record {
 129         enum {
 130                 DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS,
 131                 DRR_WRITE, DRR_FREE, DRR_END, DRR_WRITE_BYREF,
 132                 DRR_SPILL, DRR_NUMTYPES
 133         } drr_type;
 134         uint32_t drr_payloadlen;
 135         union {
 136                 struct drr_begin {
 137                         uint64_t drr_magic;
 138                         uint64_t drr_versioninfo; /* was drr_version */
 139                         uint64_t drr_creation_time;
 140                         dmu_objset_type_t drr_type;
 141                         uint32_t drr_flags;
 142                         uint64_t drr_toguid;
 143                         uint64_t drr_fromguid;
 144                         char drr_toname[MAXNAMELEN];
 145                 } drr_begin;
 146                 struct drr_end {
 147                         zio_cksum_t drr_checksum;
 148                         uint64_t drr_toguid;
 149                 } drr_end;
 150                 struct drr_object {
 151                         uint64_t drr_object;
 152                         dmu_object_type_t drr_type;
 153                         dmu_object_type_t drr_bonustype;
 154                         uint32_t drr_blksz;
 155                         uint32_t drr_bonuslen;
 156                         uint8_t drr_checksumtype;
 157                         uint8_t drr_compress;
 158                         uint8_t drr_pad[6];
 159                         uint64_t drr_toguid;
 160                         /* bonus content follows */
 161                 } drr_object;
 162                 struct drr_freeobjects {
 163                         uint64_t drr_firstobj;
 164                         uint64_t drr_numobjs;
 165                         uint64_t drr_toguid;
 166                 } drr_freeobjects;
 167                 struct drr_write {
 168                         uint64_t drr_object;
 169                         dmu_object_type_t drr_type;
 170                         uint32_t drr_pad;
 171                         uint64_t drr_offset;
 172                         uint64_t drr_length;
 173                         uint64_t drr_toguid;
 174                         uint8_t drr_checksumtype;
 175                         uint8_t drr_checksumflags;
 176                         uint8_t drr_pad2[6];
 177                         ddt_key_t drr_key; /* deduplication key */
 178                         /* content follows */
 179                 } drr_write;
 180                 struct drr_free {
 181                         uint64_t drr_object;
 182                         uint64_t drr_offset;
 183                         uint64_t drr_length;
 184                         uint64_t drr_toguid;
 185                 } drr_free;
 186                 struct drr_write_byref {
 187                         /* where to put the data */
 188                         uint64_t drr_object;
 189                         uint64_t drr_offset;
 190                         uint64_t drr_length;
 191                         uint64_t drr_toguid;
 192                         /* where to find the prior copy of the data */
 193                         uint64_t drr_refguid;
 194                         uint64_t drr_refobject;
 195                         uint64_t drr_refoffset;
 196                         /* properties of the data */
 197                         uint8_t drr_checksumtype;
 198                         uint8_t drr_checksumflags;
 199                         uint8_t drr_pad2[6];
 200                         ddt_key_t drr_key; /* deduplication key */
 201                 } drr_write_byref;
 202                 struct drr_spill {
 203                         uint64_t drr_object;
 204                         uint64_t drr_length;
 205                         uint64_t drr_toguid;
 206                         uint64_t drr_pad[4]; /* needed for crypto */
 207                         /* spill data follows */
 208                 } drr_spill;
 209         } drr_u;
 210 } dmu_replay_record_t;
 211 
 212 /* diff record range types */
 213 typedef enum diff_type {
 214         DDR_NONE = 0x1,
 215         DDR_INUSE = 0x2,
 216         DDR_FREE = 0x4
 217 } diff_type_t;
 218 
 219 /*
 220  * The diff reports back ranges of free or in-use objects.
 221  */
 222 typedef struct dmu_diff_record {
 223         uint64_t ddr_type;
 224         uint64_t ddr_first;
 225         uint64_t ddr_last;
 226 } dmu_diff_record_t;
 227 
 228 typedef struct zinject_record {
 229         uint64_t        zi_objset;
 230         uint64_t        zi_object;
 231         uint64_t        zi_start;
 232         uint64_t        zi_end;
 233         uint64_t        zi_guid;
 234         uint32_t        zi_level;
 235         uint32_t        zi_error;
 236         uint64_t        zi_type;
 237         uint32_t        zi_freq;
 238         uint32_t        zi_failfast;
 239         char            zi_func[MAXNAMELEN];
 240         uint32_t        zi_iotype;
 241         int32_t         zi_duration;
 242         uint64_t        zi_timer;
 243         uint32_t        zi_cmd;
 244         uint32_t        zi_pad;
 245 } zinject_record_t;
 246 
 247 #define ZINJECT_NULL            0x1
 248 #define ZINJECT_FLUSH_ARC       0x2
 249 #define ZINJECT_UNLOAD_SPA      0x4
 250 
 251 typedef enum zinject_type {
 252         ZINJECT_UNINITIALIZED,
 253         ZINJECT_DATA_FAULT,
 254         ZINJECT_DEVICE_FAULT,
 255         ZINJECT_LABEL_FAULT,
 256         ZINJECT_IGNORED_WRITES,
 257         ZINJECT_PANIC,
 258         ZINJECT_DELAY_IO,
 259 } zinject_type_t;
 260 
 261 typedef struct zfs_share {
 262         uint64_t        z_exportdata;
 263         uint64_t        z_sharedata;
 264         uint64_t        z_sharetype;    /* 0 = share, 1 = unshare */
 265         uint64_t        z_sharemax;  /* max length of share string */
 266 } zfs_share_t;
 267 
 268 /*
 269  * ZFS file systems may behave the usual, POSIX-compliant way, where
 270  * name lookups are case-sensitive.  They may also be set up so that
 271  * all the name lookups are case-insensitive, or so that only some
 272  * lookups, the ones that set an FIGNORECASE flag, are case-insensitive.
 273  */
 274 typedef enum zfs_case {
 275         ZFS_CASE_SENSITIVE,
 276         ZFS_CASE_INSENSITIVE,
 277         ZFS_CASE_MIXED
 278 } zfs_case_t;
 279 
 280 typedef struct zfs_cmd {
 281         char            zc_name[MAXPATHLEN];    /* name of pool or dataset */
 282         uint64_t        zc_nvlist_src;          /* really (char *) */
 283         uint64_t        zc_nvlist_src_size;
 284         uint64_t        zc_nvlist_dst;          /* really (char *) */
 285         uint64_t        zc_nvlist_dst_size;
 286         boolean_t       zc_nvlist_dst_filled;   /* put an nvlist in dst? */
 287         int             zc_pad2;
 288 
 289         /*
 290          * The following members are for legacy ioctls which haven't been
 291          * converted to the new method.
 292          */
 293         uint64_t        zc_history;             /* really (char *) */
 294         char            zc_value[MAXPATHLEN * 2];
 295         char            zc_string[MAXNAMELEN];
 296         uint64_t        zc_guid;
 297         uint64_t        zc_nvlist_conf;         /* really (char *) */
 298         uint64_t        zc_nvlist_conf_size;
 299         uint64_t        zc_cookie;
 300         uint64_t        zc_objset_type;
 301         uint64_t        zc_perm_action;
 302         uint64_t        zc_history_len;
 303         uint64_t        zc_history_offset;
 304         uint64_t        zc_obj;
 305         uint64_t        zc_iflags;              /* internal to zfs(7fs) */
 306         zfs_share_t     zc_share;
 307         dmu_objset_stats_t zc_objset_stats;
 308         struct drr_begin zc_begin_record;
 309         zinject_record_t zc_inject_record;
 310         boolean_t       zc_defer_destroy;
 311         boolean_t       zc_temphold;
 312         uint64_t        zc_action_handle;
 313         int             zc_cleanup_fd;
 314         uint8_t         zc_pad[4];              /* alignment */
 315         uint64_t        zc_sendobj;
 316         uint64_t        zc_fromobj;
 317         uint64_t        zc_createtxg;
 318         zfs_stat_t      zc_stat;
 319 } zfs_cmd_t;
 320 
 321 typedef struct zfs_useracct {
 322         char zu_domain[256];
 323         uid_t zu_rid;
 324         uint32_t zu_pad;
 325         uint64_t zu_space;
 326 } zfs_useracct_t;
 327 
 328 #define ZFSDEV_MAX_MINOR        (1 << 16)
 329 #define ZFS_MIN_MINOR   (ZFSDEV_MAX_MINOR + 1)
 330 
 331 #define ZPOOL_EXPORT_AFTER_SPLIT 0x1
 332 
 333 #ifdef _KERNEL
 334 
 335 typedef struct zfs_creat {
 336         nvlist_t        *zct_zplprops;
 337         nvlist_t        *zct_props;
 338 } zfs_creat_t;
 339 
 340 extern dev_info_t *zfs_dip;
 341 
 342 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 343 extern int zfs_secpolicy_rename_perms(const char *from,
 344     const char *to, cred_t *cr);
 345 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 346 extern int zfs_busy(void);
 347 extern void zfs_unmount_snap(const char *);
 348 extern void zfs_destroy_unmount_origin(const char *);
 349 
 350 /*
 351  * ZFS minor numbers can refer to either a control device instance or
 352  * a zvol. Depending on the value of zss_type, zss_data points to either
 353  * a zvol_state_t or a zfs_onexit_t.
 354  */
 355 enum zfs_soft_state_type {
 356         ZSST_ZVOL,
 357         ZSST_CTLDEV
 358 };
 359 
 360 typedef struct zfs_soft_state {
 361         enum zfs_soft_state_type zss_type;
 362         void *zss_data;
 363 } zfs_soft_state_t;
 364 
 365 extern void *zfsdev_get_soft_state(minor_t minor,
 366     enum zfs_soft_state_type which);
 367 extern minor_t zfsdev_minor_alloc(void);
 368 
 369 extern void *zfsdev_state;
 370 extern kmutex_t zfsdev_state_lock;
 371 
 372 #endif  /* _KERNEL */
 373 
 374 #ifdef  __cplusplus
 375 }
 376 #endif
 377 
 378 #endif  /* _SYS_ZFS_IOCTL_H */