bsd/hfs/hfs.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, 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__
  30 #define __HFS__
  31
  32 #define HFS_SPARSE_DEV 1
  33
  34 #include <sys/appleapiopts.h>
  35
  36 #ifdef KERNEL
  37 #ifdef __APPLE_API_PRIVATE
  38 #include <sys/param.h>
  39 #include <sys/queue.h>
  40 #include <sys/mount.h>
  41 #include <sys/vnode.h>
  42 #include <sys/quota.h>
  43 #include <sys/dirent.h>
  44 #include <sys/event.h>
  45
  46 #include <kern/locks.h>
  47
  48 #include <vfs/vfs_journal.h>
  49
  50 #include <hfs/hfs_format.h>
  51 #include <hfs/hfs_catalog.h>
  52 #include <hfs/hfs_cnode.h>
  53 #include <hfs/hfs_macos_defs.h>
  54 #include <hfs/hfs_encodings.h>
  55 #include <hfs/hfs_hotfiles.h>
  56
  57 /*
  58  *      Just reported via MIG interface.
  59  */
  60 #define VERSION_STRING  "hfs-2 (4-12-99)"
  61
  62 #define HFS_LINK_MAX    32767
  63
  64 #define HFS_MAX_DEFERED_ALLOC   (1024*1024)
  65
  66 // 400 mb is a "big" file (i.e. one that when deleted
  67 // would touch enough data that we should break it into
  68 // multiple separate transactions
  69 #define HFS_BIGFILE_SIZE (400LL * 1024LL * 1024LL)
  70
  71
  72 enum { kMDBSize = 512 };                                /* Size of I/O transfer to read entire MDB */
  73
  74 enum { kMasterDirectoryBlock = 2 };                     /* MDB offset on disk in 512-byte blocks */
  75 enum { kMDBOffset = kMasterDirectoryBlock * 512 };      /* MDB offset on disk in bytes */
  76
  77 #define kRootDirID kHFSRootFolderID
  78
  79
  80 /* number of locked buffer caches to hold for b-tree meta data */
  81 #define kMaxLockedMetaBuffers           32
  82
  83 /*
  84  *      File type and creator for symbolic links
  85  */
  86 enum {
  87         kSymLinkFileType  = 0x736C6E6B, /* 'slnk' */
  88         kSymLinkCreator   = 0x72686170  /* 'rhap' */
  89 };
  90
  91
  92 extern struct timezone gTimeZone;
  93
  94
  95 /* How many free extents to cache per volume */
  96 #define kMaxFreeExtents         10
  97
  98 /*
  99  * HFS_MINFREE gives the minimum acceptable percentage
 100  * of file system blocks which may be free (but this
 101  * minimum will never exceed HFS_MAXRESERVE bytes). If
 102  * the free block count drops below this level only the
 103  * superuser may continue to allocate blocks.
 104  */
 105 #define HFS_MINFREE             1
 106 #define HFS_MAXRESERVE          ((u_int64_t)(250*1024*1024))
 107
 108 /*
 109  * The system distinguishes between the desirable low-disk
 110  * notifiaction levels for root volumes and non-root volumes.
 111  * The various thresholds are computed as a fraction of the
 112  * volume size, all capped at a certain fixed level
 113  */
 114
 115 #define HFS_ROOTLOWDISKTRIGGERFRACTION 5
 116 #define HFS_ROOTLOWDISKTRIGGERLEVEL ((u_int64_t)(250*1024*1024))
 117 #define HFS_ROOTLOWDISKSHUTOFFFRACTION 6
 118 #define HFS_ROOTLOWDISKSHUTOFFLEVEL ((u_int64_t)(375*1024*1024))
 119
 120 #define HFS_LOWDISKTRIGGERFRACTION 1
 121 #define HFS_LOWDISKTRIGGERLEVEL ((u_int64_t)(50*1024*1024))
 122 #define HFS_LOWDISKSHUTOFFFRACTION 2
 123 #define HFS_LOWDISKSHUTOFFLEVEL ((u_int64_t)(75*1024*1024))
 124
 125 /* Internal Data structures*/
 126
 127
 128 #define kHFS_DamagedVolume  0x1 /* This volume has errors, unmount dirty */
 129
 130 /* XXX */
 131 #define MARK_VOLUMEDAMAGED(fcb)
 132
 133
 134 /* This structure describes the HFS specific mount structure data. */
 135 typedef struct hfsmount {
 136         u_int32_t     hfs_flags;              /* see below */
 137
 138         /* Physical Description */
 139         u_long        hfs_phys_block_size;    /* Always a multiple of 512 */
 140         daddr64_t     hfs_phys_block_count;   /* Num of PHYSICAL blocks of volume */
 141         daddr64_t     hfs_alt_id_sector;      /* location of alternate VH/MDB */
 142
 143         /* Access to VFS and devices */
 144         struct mount            *hfs_mp;                                /* filesystem vfs structure */
 145         struct vnode            *hfs_devvp;                             /* block device mounted vnode */
 146         struct vnode *          hfs_extents_vp;
 147         struct vnode *          hfs_catalog_vp;
 148         struct vnode *          hfs_allocation_vp;
 149         struct vnode *          hfs_attribute_vp;
 150         dev_t                   hfs_raw_dev;                    /* device mounted */
 151         u_int32_t               hfs_logBlockSize;               /* Size of buffer cache buffer for I/O */
 152
 153         /* Default values for HFS standard and non-init access */
 154         uid_t         hfs_uid;            /* uid to set as owner of the files */
 155         gid_t         hfs_gid;            /* gid to set as owner of the files */
 156         mode_t        hfs_dir_mask;       /* mask to and with directory protection bits */
 157         mode_t        hfs_file_mask;      /* mask to and with file protection bits */
 158         u_long        hfs_encoding;       /* Defualt encoding for non hfs+ volumes */
 159
 160         /* Persistent fields (on disk, dynamic) */
 161         time_t        hfs_mtime;          /* file system last modification time */
 162         u_int32_t     hfs_filecount;      /* number of files in file system */
 163         u_int32_t     hfs_dircount;       /* number of directories in file system */
 164         u_int32_t     freeBlocks;         /* free allocation blocks */
 165         u_int32_t     nextAllocation;     /* start of next allocation search */
 166         u_int32_t     vcbNxtCNID;         /* next unused catalog node ID */
 167         u_int32_t     vcbWrCnt;           /* file system write count */
 168         u_int64_t     encodingsBitmap;    /* in-use encodings */
 169         u_int16_t     vcbNmFls;           /* HFS Only - root dir file count */
 170         u_int16_t     vcbNmRtDirs;        /* HFS Only - root dir directory count */
 171
 172         /* Persistent fields (on disk, static) */
 173         u_int16_t                       vcbSigWord;
 174         int16_t                         vcbFlags;
 175         u_int32_t                       vcbAtrb;
 176         u_int32_t                       vcbJinfoBlock;
 177         time_t        hfs_itime;   /* file system creation time */
 178         time_t        hfs_btime;   /* file system last backup time */
 179         u_int32_t                       blockSize;      /* size of allocation blocks */
 180         u_int32_t                       totalBlocks;    /* total allocation blocks */
 181         int32_t                         vcbClpSiz;
 182         u_int32_t     vcbFndrInfo[8];
 183         int16_t                         vcbVBMSt;               /* HFS only */
 184         int16_t                         vcbAlBlSt;              /* HFS only */
 185
 186         /* vcb stuff */
 187         u_int8_t                        vcbVN[256];             /* volume name in UTF-8 */
 188         u_int32_t                       volumeNameEncodingHint;
 189         u_int32_t                       hfsPlusIOPosOffset;     /* Disk block where HFS+ starts */
 190         u_int32_t                       vcbVBMIOSize;           /* volume bitmap I/O size */
 191
 192         /* cache of largest known free extents */
 193         u_int32_t                       vcbFreeExtCnt;
 194         HFSPlusExtentDescriptor vcbFreeExt[kMaxFreeExtents];
 195
 196         u_int32_t               reserveBlocks;          /* free block reserve */
 197         u_int32_t               loanedBlocks;           /* blocks on loan for delayed allocations */
 198
 199         u_int32_t                       localCreateDate;        /* creation times for HFS+ volumes are in local time */
 200         struct cat_desc         hfs_privdir_desc;
 201         struct cat_attr         hfs_privdir_attr;
 202         u_int32_t               hfs_metadata_createdate;
 203         hfs_to_unicode_func_t   hfs_get_unicode;
 204         unicode_to_hfs_func_t   hfs_get_hfsname;
 205
 206         /* Quota variables: */
 207         struct quotafile        hfs_qfiles[MAXQUOTAS];    /* quota files */
 208
 209         /* Journaling variables: */
 210         void                *jnl;           // the journal for this volume (if one exists)
 211         struct vnode        *jvp;           // device where the journal lives (may be equal to devvp)
 212         u_int32_t            jnl_start;     // start block of the journal file (so we don't delete it)
 213         u_int32_t            jnl_size;
 214         u_int32_t            hfs_jnlfileid;
 215         u_int32_t            hfs_jnlinfoblkid;
 216         lck_rw_t             hfs_global_lock;
 217         u_int32_t            hfs_global_lock_nesting;
 218
 219         /* Notification variables: */
 220         unsigned long           hfs_notification_conditions;
 221         u_int32_t               hfs_freespace_notify_warninglimit;
 222         u_int32_t               hfs_freespace_notify_desiredlevel;
 223
 224         /* time mounted and last mounted mod time "snapshot" */
 225         time_t          hfs_mount_time;
 226         time_t          hfs_last_mounted_mtime;
 227
 228         /* Metadata allocation zone variables: */
 229         u_int32_t       hfs_metazone_start;
 230         u_int32_t       hfs_metazone_end;
 231         u_int32_t       hfs_hotfile_start;
 232         u_int32_t       hfs_hotfile_end;
 233         int             hfs_hotfile_freeblks;
 234         int             hfs_hotfile_maxblks;
 235         int             hfs_overflow_maxblks;
 236         int             hfs_catalog_maxblks;
 237
 238         /* Hot File Clustering variables: */
 239         lck_mtx_t       hfc_mutex;      /* serialize hot file stages */
 240         enum hfc_stage  hfc_stage;      /* what are we up to... */
 241         time_t          hfc_timebase;   /* recording period start time */
 242         time_t          hfc_timeout;    /* recording period stop time */
 243         void *          hfc_recdata;    /* recording data (opaque) */
 244         int             hfc_maxfiles;   /* maximum files to track */
 245         struct vnode *  hfc_filevp;
 246
 247 #ifdef HFS_SPARSE_DEV
 248         /* Sparse device variables: */
 249         struct vnode * hfs_backingfs_rootvp;
 250         int            hfs_sparsebandblks;
 251 #endif
 252         size_t         hfs_max_inline_attrsize;
 253
 254         lck_mtx_t      hfs_mutex;      /* protects access to hfsmount data */
 255         void          *hfs_freezing_proc;  /* who froze the fs */
 256         lck_rw_t       hfs_insync;     /* protects sync/freeze interaction */
 257
 258         /* Resize variables: */
 259         u_int32_t               hfs_resize_filesmoved;
 260         u_int32_t               hfs_resize_totalfiles;
 261 } hfsmount_t;
 262
 263 typedef hfsmount_t  ExtendedVCB;
 264
 265 /* Aliases for legacy field names */
 266 #define vcbCrDate          hfs_itime
 267 #define vcbLsMod           hfs_mtime
 268 #define vcbVolBkUp         hfs_btime
 269 #define extentsRefNum      hfs_extents_vp
 270 #define catalogRefNum      hfs_catalog_vp
 271 #define allocationsRefNum  hfs_allocation_vp
 272 #define vcbFilCnt          hfs_filecount
 273 #define vcbDirCnt          hfs_dircount
 274
 275
 276 /* HFS mount point flags */
 277 #define HFS_READ_ONLY             0x001
 278 #define HFS_UNKNOWN_PERMS         0x002
 279 #define HFS_WRITEABLE_MEDIA       0x004
 280 #define HFS_CLEANED_ORPHANS       0x008
 281 #define HFS_X                     0x010
 282 #define HFS_CASE_SENSITIVE        0x020
 283 #define HFS_STANDARD              0x040
 284 #define HFS_METADATA_ZONE         0x080
 285 #define HFS_FRAGMENTED_FREESPACE  0x100
 286 #define HFS_NEED_JNL_RESET        0x200
 287 #define HFS_HAS_SPARSE_DEVICE     0x400
 288 #define HFS_RESIZE_IN_PROGRESS    0x800
 289
 290
 291 #define HFS_MOUNT_LOCK(hfsmp, metadata)                      \
 292         {                                                    \
 293                 if ((metadata) && 1)                         \
 294                         lck_mtx_lock(&(hfsmp)->hfs_mutex);   \
 295         }                                                    \
 296
 297 #define HFS_MOUNT_UNLOCK(hfsmp, metadata)                    \
 298         {                                                    \
 299                 if ((metadata) && 1)                         \
 300                         lck_mtx_unlock(&(hfsmp)->hfs_mutex); \
 301         }                                                    \
 302
 303 #define hfs_global_exclusive_lock_acquire(hfsmp) lck_rw_lock_exclusive(&(hfsmp)->hfs_global_lock)
 304 #define hfs_global_exclusive_lock_release(hfsmp) lck_rw_done(&(hfsmp)->hfs_global_lock)
 305
 306
 307 #define MAXHFSVNODELEN          31
 308
 309
 310 typedef struct filefork FCB;
 311
 312
 313 #define MAKE_INODE_NAME(name,linkno) \
 314             (void) sprintf((name), "%s%d", HFS_INODE_PREFIX, (linkno))
 315
 316 #define HFS_INODE_PREFIX_LEN    5
 317
 318
 319 #define HFS_AVERAGE_NAME_SIZE   22
 320 #define AVERAGE_HFSDIRENTRY_SIZE  (8+HFS_AVERAGE_NAME_SIZE+4)
 321
 322 #define STD_DIRENT_LEN(namlen) \
 323         ((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen)+1 + 3) &~ 3))
 324
 325 #define EXT_DIRENT_LEN(namlen) \
 326         ((sizeof(struct direntry) + (namlen) - (MAXPATHLEN-1) + 3) & ~3)
 327
 328
 329 enum { kHFSPlusMaxFileNameBytes = kHFSPlusMaxFileNameChars * 3 };
 330
 331
 332 /* macro to determine if hfs or hfsplus */
 333 #define ISHFSPLUS(VCB) ((VCB)->vcbSigWord == kHFSPlusSigWord)
 334 #define ISHFS(VCB) ((VCB)->vcbSigWord == kHFSSigWord)
 335
 336
 337 /*
 338  * Various ways to acquire a VFS mount point pointer:
 339  */
 340 #define VTOVFS(VP)  vnode_mount((VP))
 341 #define HFSTOVFS(HFSMP) ((HFSMP)->hfs_mp)
 342 #define VCBTOVFS(VCB)   HFSTOVFS(VCB)
 343
 344 /*
 345  * Various ways to acquire an HFS mount point pointer:
 346  */
 347 #define VTOHFS(VP)  ((struct hfsmount *)vfs_fsprivate(vnode_mount((VP))))
 348 #define VFSTOHFS(MP)  ((struct hfsmount *)vfs_fsprivate((MP)))
 349 #define VCBTOHFS(VCB) (VCB)
 350 #define FCBTOHFS(FCB)  ((struct hfsmount *)vfs_fsprivate(vnode_mount((FCB)->ff_cp->c_vp)))
 351
 352 /*
 353  * Various ways to acquire a VCB (legacy) pointer:
 354  */
 355 #define VTOVCB(VP)       VTOHFS(VP)
 356 #define VFSTOVCB(MP)     VFSTOHFS(MP)
 357 #define HFSTOVCB(HFSMP)  (HFSMP)
 358 #define FCBTOVCB(FCB)    FCBTOHFS(FCB)
 359
 360
 361 #define HFS_KNOTE(vp, hint) KNOTE(&VTOC(vp)->c_knotes, (hint))
 362
 363
 364 #define E_NONE  0
 365 #define kHFSBlockSize 512
 366
 367 /*
 368  * Macros for getting the MDB/VH sector and offset
 369  */
 370 #define HFS_PRI_SECTOR(blksize)          (1024 / (blksize))
 371 #define HFS_PRI_OFFSET(blksize)          ((blksize) > 1024 ? 1024 : 0)
 372
 373 #define HFS_ALT_SECTOR(blksize, blkcnt)  (((blkcnt) - 1) - (512 / (blksize)))
 374 #define HFS_ALT_OFFSET(blksize)          ((blksize) > 1024 ? (blksize) - 1024 : 0)
 375
 376
 377 /*
 378  * HFS specific fcntl()'s
 379  */
 380 #define HFS_BULKACCESS      (FCNTL_FS_SPECIFIC_BASE + 0x00001)
 381 #define HFS_GET_MOUNT_TIME  (FCNTL_FS_SPECIFIC_BASE + 0x00002)
 382 #define HFS_GET_LAST_MTIME  (FCNTL_FS_SPECIFIC_BASE + 0x00003)
 383 #define HFS_GET_BOOT_INFO   (FCNTL_FS_SPECIFIC_BASE + 0x00004)
 384 #define HFS_SET_BOOT_INFO   (FCNTL_FS_SPECIFIC_BASE + 0x00005)
 385
 386
 387 /*
 388  *      This is the straight GMT conversion constant:
 389  *      00:00:00 January 1, 1970 - 00:00:00 January 1, 1904
 390  *      (3600 * 24 * ((365 * (1970 - 1904)) + (((1970 - 1904) / 4) + 1)))
 391  */
 392 #define MAC_GMT_FACTOR          2082844800UL
 393
 394
 395 time_t to_bsd_time(u_int32_t hfs_time);
 396 u_int32_t to_hfs_time(time_t bsd_time);
 397
 398 int hfs_flushvolumeheader(struct hfsmount *hfsmp, int waitfor, int altflush);
 399 #define HFS_ALTFLUSH    1
 400
 401 extern int hfsUnmount(struct hfsmount *hfsmp, struct proc *p);
 402
 403 extern int hfs_getnewvnode(struct hfsmount *hfsmp, struct vnode *dvp, struct componentname *cnp,
 404                            struct cat_desc *descp, int wantrsrc, struct cat_attr *attrp,
 405                            struct cat_fork *forkp, struct vnode **vpp);
 406
 407 extern u_int32_t hfs_freeblks(struct hfsmount * hfsmp, int wantreserve);
 408
 409 extern void hfs_remove_orphans(struct hfsmount *);
 410
 411
 412 short MacToVFSError(OSErr err);
 413
 414 extern int hfs_owner_rights(struct hfsmount *hfsmp, uid_t cnode_uid, struct ucred *cred,
 415                 struct proc *p, int invokesuperuserstatus);
 416
 417 u_long FindMetaDataDirectory(ExtendedVCB *vcb);
 418
 419 #define  kMaxSecsForFsync       5
 420 #define  HFS_SYNCTRANS          1
 421
 422 extern int hfs_btsync(struct vnode *vp, int sync_transaction);
 423 // used as a callback by the journaling code
 424 extern void hfs_sync_metadata(void *arg);
 425
 426 short make_dir_entry(FCB **fileptr, char *name, u_int32_t fileID);
 427
 428
 429 unsigned long BestBlockSizeFit(unsigned long allocationBlockSize,
 430                                unsigned long blockSizeLimit,
 431                                unsigned long baseMultiple);
 432
 433 OSErr   hfs_MountHFSVolume(struct hfsmount *hfsmp, HFSMasterDirectoryBlock *mdb,
 434                 struct proc *p);
 435 OSErr   hfs_MountHFSPlusVolume(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
 436                 off_t embeddedOffset, u_int64_t disksize, struct proc *p, void *args, kauth_cred_t cred);
 437
 438 extern int     hfs_early_journal_init(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
 439                                                            void *_args, off_t embeddedOffset, daddr64_t mdb_offset,
 440                                                            HFSMasterDirectoryBlock *mdbp, struct ucred *cred);
 441 extern u_long  GetFileInfo(ExtendedVCB *vcb, u_int32_t dirid, const char *name,
 442                                                    struct cat_attr *fattr, struct cat_fork *forkinfo);
 443
 444 int hfs_getconverter(u_int32_t encoding, hfs_to_unicode_func_t *get_unicode,
 445                      unicode_to_hfs_func_t *get_hfsname);
 446
 447 int hfs_relconverter(u_int32_t encoding);
 448
 449 int hfs_to_utf8(ExtendedVCB *vcb, Str31 hfs_str, ByteCount maxDstLen,
 450                 ByteCount *actualDstLen, unsigned char* dstStr);
 451
 452 int utf8_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, const unsigned char* srcStr,
 453                 Str31 dstStr);
 454
 455 int mac_roman_to_utf8(Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen,
 456                 unsigned char* dstStr);
 457
 458 int utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr);
 459
 460 u_int32_t hfs_pickencoding(const u_int16_t *src, int len);
 461
 462 enum volop {VOL_UPDATE, VOL_MKDIR, VOL_RMDIR, VOL_MKFILE, VOL_RMFILE};
 463
 464 extern int hfs_volupdate(struct hfsmount *hfsmp, enum volop op, int inroot);
 465
 466 extern void hfs_setencodingbits(struct hfsmount *hfsmp, u_int32_t encoding);
 467
 468
 469 extern void replace_desc(struct cnode *cp, struct cat_desc *cdp);
 470
 471 extern int hfs_namecmp(const char *, size_t, const char *, size_t);
 472
 473 extern int  hfs_virtualmetafile(struct cnode *);
 474
 475 void hfs_generate_volume_notifications(struct hfsmount *hfsmp);
 476
 477 __private_extern__ u_int32_t hfs_getencodingbias(void);
 478 __private_extern__ void hfs_setencodingbias(u_int32_t bias);
 479
 480 extern int hfs_vgetrsrc(struct hfsmount *hfsmp, struct vnode *vp,
 481                         struct vnode **rvpp, struct proc *p);
 482
 483 extern int hfs_update(struct vnode *, int);
 484
 485 extern int hfs_truncate(struct vnode *, off_t, int, int, vfs_context_t);
 486
 487 extern int hfs_fsync(struct vnode *, int, int, struct proc *);
 488
 489 extern int hfs_access(struct vnode *, mode_t, struct ucred *, struct proc *);
 490
 491 extern int hfs_vget(struct hfsmount *, cnid_t, struct vnode **, int);
 492
 493 extern int hfs_bmap(struct vnode *, daddr_t, struct vnode **, daddr64_t *, int *);
 494
 495 extern int hfs_removeallattr(struct hfsmount *hfsmp, u_int32_t fileid);
 496
 497 __private_extern__ int hfs_start_transaction(struct hfsmount *hfsmp);
 498 __private_extern__ int hfs_end_transaction(struct hfsmount *hfsmp);
 499
 500 extern int  hfs_setextendedsecurity(struct hfsmount *hfsmp, int state);
 501 extern void hfs_checkextendedsecurity(struct hfsmount *hfsmp);
 502
 503 extern int  hfs_extendfs(struct hfsmount *, u_int64_t, vfs_context_t);
 504 extern int  hfs_truncatefs(struct hfsmount *, u_int64_t, vfs_context_t);
 505 extern int  hfs_resize_progress(struct hfsmount *, u_int32_t *);
 506
 507 extern int  hfs_isallocated(struct hfsmount *, u_long, u_long);
 508
 509
 510 /* HFS System file locking */
 511 #define SFL_CATALOG     0x0001
 512 #define SFL_EXTENTS     0x0002
 513 #define SFL_BITMAP      0x0004
 514 #define SFL_ATTRIBUTE   0x0008
 515 #define SFL_VALIDMASK   (SFL_CATALOG | SFL_EXTENTS | SFL_BITMAP | SFL_ATTRIBUTE)
 516
 517 extern int  hfs_systemfile_lock(struct hfsmount *, int, enum hfslocktype);
 518 extern void hfs_systemfile_unlock(struct hfsmount *, int);
 519
 520 #endif /* __APPLE_API_PRIVATE */
 521 #endif /* KERNEL */
 522 #endif /* __HFS__ */