core/hfs_fsctl.h

   1 /*
   2  * Copyright (c) 2004-2015 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _HFS_FSCTL_H_
  30 #define _HFS_FSCTL_H_
  31
  32 #include <sys/appleapiopts.h>
  33
  34 #include <sys/param.h>
  35 #include <sys/ioccom.h>
  36 #include <sys/time.h>
  37 #include <stdint.h>
  38
  39 #ifdef __APPLE_API_UNSTABLE
  40
  41 struct hfs_backingstoreinfo {
  42         int  signature;   /* == 3419115 */
  43         int  version;     /* version of this struct (1) */
  44         int  backingfd;   /* disk image file (on backing fs) */
  45         int  bandsize;    /* sparse disk image band size */
  46 };
  47
  48
  49 typedef char pathname_t[MAXPATHLEN];
  50
  51 struct hfs_journal_info {
  52         off_t   jstart;
  53         off_t   jsize;
  54 };
  55
  56
  57 // Will be deprecated and replaced by hfs_fsinfo
  58 struct hfsinfo_metadata {
  59         uint32_t total;
  60         uint32_t extents;
  61         uint32_t catalog;
  62         uint32_t allocation;
  63         uint32_t attribute;
  64         uint32_t journal;
  65         uint32_t reserved[4];
  66 };
  67
  68 /*
  69  * Flags for hfs_fsinfo_data structure
  70  */
  71 #define HFS_FSINFO_CLASS_A      0x0001  /* Information for class A files requested */
  72 #define HFS_FSINFO_CLASS_B      0x0002  /* Information for class B files requested */
  73 #define HFS_FSINFO_CLASS_C      0x0004  /* Information for class C files requested */
  74 #define HFS_FSINFO_CLASS_D      0x0008  /* Information for class D files requested */
  75
  76 /*
  77  * Maximum number of buckets to represent range from 0 to 1TB (2^40) in
  78  * increments of power of 2, and one catch-all bucket for anything that
  79  * is greater than 1TB
  80  */
  81 #define HFS_FSINFO_DATA_MAX_BUCKETS     42
  82
  83 /*
  84  * Maximum number of buckets to represents percentage range from 0 to 100
  85  * in increments of 10.
  86  */
  87 #define HFS_FSINFO_PERCENT_MAX_BUCKETS  10
  88
  89 /*
  90  * Maximum number of buckets to represent number of file/directory name characters
  91  * (range 1 to 255) in increments of 5.
  92  */
  93 #define HFS_FSINFO_NAME_MAX_BUCKETS     51
  94
  95 /*
  96  * Version number to ensure that the caller and the kernel have same understanding
  97  * of the hfs_fsinfo_data structure.  This version needs to be bumped whenever the
  98  * number of buckets is changed.
  99  */
 100 #define HFS_FSINFO_VERSION              1
 101
 102 /*
 103  * hfs_fsinfo_data is generic data structure to aggregate information like sizes
 104  * or counts in buckets of power of 2.  Each bucket represents a range of values
 105  * that is determined based on its index in the array.  Specifically, buckets[i]
 106  * represents values that are greater than or equal to 2^(i-1) and less than 2^i,
 107  * except the last bucket which represents range greater than or equal to 2^(i-1)
 108  *
 109  * The current maximum number of buckets is 41, so we can represent range from
 110  * 0 up to 1TB in increments of power of 2, and then a catch-all bucket of
 111  * anything that is greater than or equal to 1TB.
 112  *
 113  * For example,
 114  * bucket[0]  -> greater than or equal to 0 and less than 1
 115  * bucket[1]  -> greater than or equal to 1 and less than 2
 116  * bucket[10] -> greater than or equal to 2^(10-1) = 512 and less than 2^10 = 1024
 117  * bucket[20] -> greater than or equal to 2^(20-1) = 512KB and less than 2^20 = 1MB
 118  * bucket[41] -> greater than or equal to 2^(41-1) = 1TB
 119  *
 120  * Note that fsctls that populate this data structure can take long time to
 121  * execute as this operation can be I/O intensive (traversing btrees) and compute
 122  * intensive.
 123  *
 124  * WARNING: Any changes to this structure should also update version number to
 125  * ensure that the clients and kernel are reading/writing correctly.
 126  */
 127
 128 /*
 129  * The header includes the user input fields.
 130  */
 131 typedef struct hfs_fsinfo_header {
 132         uint32_t request_type;
 133         uint16_t version;
 134         uint16_t flags;
 135 } hfs_fsinfo_header_t;
 136
 137 struct hfs_fsinfo_data {
 138         hfs_fsinfo_header_t header;
 139         uint32_t                        bucket[HFS_FSINFO_DATA_MAX_BUCKETS];
 140 };
 141
 142 /*
 143  * Structure to represent information about metadata files
 144  *
 145  * WARNING: Any changes to this structure should also update version number to
 146  * ensure that the clients and kernel are reading/writing correctly.
 147  */
 148 struct hfs_fsinfo_metadata {
 149         hfs_fsinfo_header_t header;
 150         uint32_t                        extents;
 151         uint32_t                        catalog;
 152         uint32_t                        allocation;
 153         uint32_t                        attribute;
 154         uint32_t                        journal;
 155 };
 156
 157 /*
 158  * Structure to represent distribution of number of file name characters
 159  * in increments of 5s.  Each bucket represents a range of values that is
 160  * determined based on its index in the array.  So bucket[i] represents values
 161  * that are greater than or equal to (i*5) and less than ((i+1)*10).
 162  *
 163  * Since this structure represents range of file name characters and the
 164  * maximum number of unicode characters in HFS+ is 255, the maximum number
 165  * of buckets will be 52 [0..51].
 166  *
 167  * For example,
 168  * bucket[4] -> greater than or equal to 20 and less than 25 characters
 169  * bucket[51] -> equal to 255 characters
 170  *
 171  * WARNING: Any changes to this structure should also update version number to
 172  * ensure that the clients and kernel are reading/writing correctly.
 173  */
 174 struct hfs_fsinfo_name {
 175         hfs_fsinfo_header_t     header;
 176         uint32_t                        bucket[HFS_FSINFO_NAME_MAX_BUCKETS];
 177 };
 178
 179 /*
 180  * Structure to represent information about content protection classes
 181  *
 182  * WARNING: Any changes to this structure should also update version number to
 183  * ensure that the clients and kernel are reading/writing correctly.
 184  */
 185 struct hfs_fsinfo_cprotect {
 186         hfs_fsinfo_header_t     header;
 187         uint32_t class_A;
 188         uint32_t class_B;
 189         uint32_t class_C;
 190         uint32_t class_D;
 191         uint32_t class_E;
 192         uint32_t class_F;
 193 };
 194
 195 /*
 196  * Union of all the different values returned by HFSIOC_FSINFO fsctl
 197  */
 198 union hfs_fsinfo {
 199         hfs_fsinfo_header_t                     header;
 200         struct hfs_fsinfo_data          data;
 201         struct hfs_fsinfo_metadata      metadata;
 202         struct hfs_fsinfo_name          name;
 203         struct hfs_fsinfo_cprotect cprotect;
 204 };
 205 typedef union hfs_fsinfo hfs_fsinfo;
 206
 207 /*
 208  * Type of FSINFO requested, specified by the caller in request_type field
 209  */
 210 enum {
 211         /* Information about number of allocation blocks for each metadata file, returns struct hfs_fsinfo_metadata */
 212         HFS_FSINFO_METADATA_BLOCKS_INFO = 1,
 213
 214         /* Information about number of extents for each metadata file, returns struct hfs_fsinfo_metadata */
 215         HFS_FSINFO_METADATA_EXTENTS             = 2,
 216
 217         /* Information about percentage of free nodes vs used nodes in metadata btrees, returns struct hfs_fsinfo_metadata */
 218         HFS_FSINFO_METADATA_PERCENTFREE = 3,
 219
 220         /* Distribution of number of extents for data files (data fork, no rsrc fork, no xattr), returns struct hfs_fsinfo_data */
 221         HFS_FSINFO_FILE_EXTENT_COUNT    = 4,
 222
 223         /* Distribution of extent sizes for data files (data fork, no rsrc fork, no xattr), returns struct hfs_fsinfo_data */
 224         HFS_FSINFO_FILE_EXTENT_SIZE             = 5,
 225
 226         /* Distribution of file sizes for data files (data fork, no rsrc fork, no xattr), returns struct hfs_fsinfo_data */
 227         HFS_FSINFO_FILE_SIZE                    = 6,
 228
 229         /* Distribution of valence for all directories, returns struct hfs_fsinfo_data */
 230         HFS_FSINFO_DIR_VALENCE                  = 7,
 231
 232         /* Distribution of file/directory name size in unicode characters, returns struct hfs_fsinfo_name */
 233         HFS_FSINFO_NAME_SIZE                    = 8,
 234
 235         /* Distribution of extended attribute sizes, returns hfs_fsinfo_data */
 236         HFS_FSINFO_XATTR_SIZE                   = 9,
 237
 238         /* Distribution of free space for the entire file system, returns struct hfs_fsinfo_data */
 239         HFS_FSINFO_FREE_EXTENTS                 = 10,
 240
 241         /* Information about number of files belonging to each class, returns hfs_fsinfo_cprotect */
 242         HFS_FSINFO_FILE_CPROTECT_COUNT  = 11,
 243
 244         /*
 245          * Distribution of symbolic link sizes for data files (data fork, no rsrc fork, no xattr),
 246          * returns struct hfs_fsinfo_data
 247          */
 248         HFS_FSINFO_SYMLINK_SIZE                 = 12,
 249 };
 250
 251
 252 /* HFS FS CONTROL COMMANDS */
 253
 254 #define HFSIOC_RESIZE_PROGRESS  _IOR('h', 1, u_int32_t)
 255
 256 #define HFSIOC_RESIZE_VOLUME  _IOW('h', 2, u_int64_t)
 257
 258 #define HFSIOC_CHANGE_NEXT_ALLOCATION  _IOWR('h', 3, u_int32_t)
 259 /* Magic value for next allocation to use with fcntl to set next allocation
 260  * to zero and never update it again on new block allocation.
 261  */
 262 #define HFS_NO_UPDATE_NEXT_ALLOCATION   0xffffFFFF
 263
 264 #define HFSIOC_GETCREATETIME  _IOR('h', 4, time_t)
 265
 266 #define HFSIOC_SETBACKINGSTOREINFO  _IOW('h', 7, struct hfs_backingstoreinfo)
 267
 268 #define HFSIOC_CLRBACKINGSTOREINFO  _IO('h', 8)
 269
 270 // 'h', 9 used to be HFSIOC_BULKACCESS which is now deprecated
 271
 272 /* Unsupported - Previously used to enable/disable ACLs */
 273 #define HFSIOC_UNSUPPORTED  _IOW('h', 10, int32_t)
 274
 275 #define HFSIOC_PREV_LINK  _IOWR('h', 11, u_int32_t)
 276
 277 #define HFSIOC_NEXT_LINK  _IOWR('h', 12, u_int32_t)
 278
 279 #define HFSIOC_GETPATH  _IOWR('h', 13, pathname_t)
 280 /* By default, the path returned by HFS_GETPATH is an absolute path,
 281  * i.e. it also contains the mount point of the volume on which the
 282  * fileID exists.  If the following bit is set, the path returned is
 283  * relative to the root of the volume.
 284  */
 285 #define HFS_GETPATH_VOLUME_RELATIVE     0x1
 286
 287 /* Enable/disable extent-based extended attributes */
 288 #define HFSIOC_SET_XATTREXTENTS_STATE  _IOW('h', 14, u_int32_t)
 289
 290 #if defined(KERNEL)
 291 #define HFSIOC_EXT_BULKACCESS32 _IOW('h', 15, struct user32_ext_access_t)
 292 #define HFSIOC_EXT_BULKACCESS64 _IOW('h', 15, struct user64_ext_access_t)
 293 #else
 294 #define HFSIOC_EXT_BULKACCESS _IOW('h', 15, struct ext_access_t)
 295 #endif /* KERNEL */
 296
 297 #define HFSIOC_MARK_BOOT_CORRUPT _IO('h', 16)
 298
 299 #define HFSIOC_GET_JOURNAL_INFO _IOR('h', 17, struct hfs_journal_info)
 300
 301 #define HFSIOC_SET_VERY_LOW_DISK _IOW('h', 20, u_int32_t)
 302
 303 #define HFSIOC_SET_LOW_DISK _IOW('h', 21, u_int32_t)
 304
 305 #define HFSIOC_SET_DESIRED_DISK _IOW('h', 22, u_int32_t)
 306
 307 #define HFSIOC_SET_ALWAYS_ZEROFILL _IOW('h', 23, int32_t)
 308         /* XXXJRT Keep until 31866920 is resolved. */
 309 #define HFS_SET_ALWAYS_ZEROFILL IOCBASECMD(HFSIOC_SET_ALWAYS_ZEROFILL)
 310
 311 #define HFSIOC_VOLUME_STATUS  _IOR('h', 24, u_int32_t)
 312
 313 /* Disable metadata zone for given volume */
 314 #define HFSIOC_DISABLE_METAZONE _IO('h', 25)
 315
 316 /* Change the next CNID value */
 317 #define HFSIOC_CHANGE_NEXTCNID  _IOWR('h', 26, u_int32_t)
 318         /* XXXJRT Keep until 31866920 is resolved. */
 319 #define HFS_CHANGE_NEXTCNID             IOCBASECMD(HFSIOC_CHANGE_NEXTCNID)
 320
 321 /* Get the low disk space values */
 322 #define HFSIOC_GET_VERY_LOW_DISK        _IOR('h', 27, u_int32_t)
 323
 324 #define HFSIOC_GET_LOW_DISK     _IOR('h', 28, u_int32_t)
 325
 326 #define HFSIOC_GET_DESIRED_DISK _IOR('h', 29, u_int32_t)
 327
 328 /* 30 was HFSIOC_GET_WRITE_GEN_COUNTER and is now deprecated */
 329
 330 /* 31 was HFSIOC_GET_DOCUMENT_ID and is now deprecated */
 331
 332 /* revisiond only uses this when something transforms in a way the kernel can't track such as "foo.rtf" -> "foo.rtfd" */
 333 #define HFSIOC_TRANSFER_DOCUMENT_ID  _IOW('h', 32, u_int32_t)
 334
 335
 336 /*
 337  * XXX: Will be deprecated and replaced by HFSIOC_GET_FSINFO
 338  *
 339  * Get information about number of file system allocation blocks used by metadata
 340  * files on the volume, including individual btrees and journal file.  The caller
 341  * can determine the size of file system allocation block using value returned as
 342  * f_bsize by statfs(2).
 343  */
 344 #define HFSIOC_FSINFO_METADATA_BLOCKS  _IOWR('h', 38, struct hfsinfo_metadata)
 345
 346 /* Send TRIMs for all free blocks to the underlying device */
 347 #define HFSIOC_CS_FREESPACE_TRIM _IOWR('h', 39, u_int32_t)
 348
 349
 350 /* Get file system information for the given volume */
 351 #define HFSIOC_GET_FSINFO        _IOWR('h', 45, hfs_fsinfo)
 352
 353 /* Re-pin hotfile data; argument controls what state gets repinned */
 354 #define HFSIOC_REPIN_HOTFILE_STATE _IOWR('h', 46, u_int32_t)
 355
 356 #define HFS_REPIN_METADATA      0x0001
 357 #define HFS_REPIN_USERDATA      0x0002
 358
 359 /* Mark a directory or file as worth caching on any underlying "fast" device */
 360 #define HFSIOC_SET_HOTFILE_STATE _IOWR('h', 47, u_int32_t)
 361
 362 /* flags to pass to SET_HOTFILE_STATE */
 363 #define HFS_MARK_FASTDEVCANDIDATE   0x0001
 364 #define HFS_UNMARK_FASTDEVCANDIDATE 0x0002
 365 #define HFS_NEVER_FASTDEVCANDIDATE  0x0004
 366
 367 #define HFSIOC_SET_MAX_DEFRAG_SIZE _IOWR('h', 48, u_int32_t)
 368
 369 #define HFSIOC_FORCE_ENABLE_DEFRAG _IOWR('h', 49, u_int32_t)
 370
 371 /* These fsctls are ported from apfs. */
 372 #ifndef APFSIOC_SET_NEAR_LOW_DISK
 373 #define APFSIOC_SET_NEAR_LOW_DISK _IOW('J', 17, u_int32_t)
 374 #endif /* APFSIOC_SET_NEAR_LOW_DISK */
 375
 376 #ifndef APFSIOC_GET_NEAR_LOW_DISK
 377 #define APFSIOC_GET_NEAR_LOW_DISK _IOR('J', 18, u_int32_t)
 378 #endif /* APFSIOC_GET_NEAR_LOW_DISK */
 379
 380 #endif /* __APPLE_API_UNSTABLE */
 381
 382 #endif /* ! _HFS_FSCTL_H_ */