xnu-1504.3.12.tar.gz

[apple/xnu.git] / bsd / hfs / hfs.h

diff --git a/bsd/hfs/hfs.h b/bsd/hfs/hfs.h
index 1cfb21d13bcac4996080cafb4c3a091433852f76..beb10099f697171fad4420d58552dc58c2a59459 100644 (file)
--- a/bsd/hfs/hfs.h
+++ b/bsd/hfs/hfs.h
@@ -1,16 +1,19 @@
 /*
 /*

- * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2009 Apple Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in

- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.

  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER


@@ -20,24 +23,32 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 

- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 
 #ifndef __HFS__
 #define __HFS__
 
  */
 
 #ifndef __HFS__
 #define __HFS__
 

+#define HFS_SPARSE_DEV 1
+
+#if DEBUG
+#define HFS_CHECK_LOCK_ORDER 1
+#endif
+

 #include <sys/appleapiopts.h>
 
 #ifdef KERNEL
 #ifdef __APPLE_API_PRIVATE
 #include <sys/param.h>
 #include <sys/appleapiopts.h>
 
 #ifdef KERNEL
 #ifdef __APPLE_API_PRIVATE
 #include <sys/param.h>

-#include <sys/lock.h>

 #include <sys/queue.h>
 #include <sys/mount.h>
 #include <sys/queue.h>
 #include <sys/mount.h>

-#include <sys/namei.h>

 #include <sys/vnode.h>
 #include <sys/quota.h>
 #include <sys/dirent.h>
 #include <sys/vnode.h>
 #include <sys/quota.h>
 #include <sys/dirent.h>

+#include <sys/event.h>
+#include <kern/thread_call.h>
+
+#include <kern/locks.h>

 
 #include <vfs/vfs_journal.h>
 
 
 #include <vfs/vfs_journal.h>
 


@@ -46,10 +57,7 @@
 #include <hfs/hfs_cnode.h>
 #include <hfs/hfs_macos_defs.h>
 #include <hfs/hfs_encodings.h>
 #include <hfs/hfs_cnode.h>
 #include <hfs/hfs_macos_defs.h>
 #include <hfs/hfs_encodings.h>

-
-
-struct uio;            // This is more effective than #include <sys/uio.h> in case KERNEL is undefined...
-struct hfslockf;       /* For advisory locking */
+#include <hfs/hfs_hotfiles.h>

 
 /*
  *     Just reported via MIG interface.
 
 /*
  *     Just reported via MIG interface.


@@ -60,36 +68,23 @@ struct hfslockf;    /* For advisory locking */
 
 #define HFS_MAX_DEFERED_ALLOC  (1024*1024)
 
 
 #define HFS_MAX_DEFERED_ALLOC  (1024*1024)
 

+// 400 megs is a "big" file (i.e. one that when deleted
+// would touch enough data that we should break it into
+// multiple separate transactions)
+#define HFS_BIGFILE_SIZE (400LL * 1024LL * 1024LL)
+

 
 enum { kMDBSize = 512 };                               /* Size of I/O transfer to read entire MDB */
 
 enum { kMasterDirectoryBlock = 2 };                    /* MDB offset on disk in 512-byte blocks */
 enum { kMDBOffset = kMasterDirectoryBlock * 512 };     /* MDB offset on disk in bytes */
 
 
 enum { kMDBSize = 512 };                               /* Size of I/O transfer to read entire MDB */
 
 enum { kMasterDirectoryBlock = 2 };                    /* MDB offset on disk in 512-byte blocks */
 enum { kMDBOffset = kMasterDirectoryBlock * 512 };     /* MDB offset on disk in bytes */
 

-enum {
-       kUnknownID = 0,
-       kRootParID = 1,
-       kRootDirID = 2
-};
+#define kRootDirID kHFSRootFolderID

 
 

-enum {
-       kDataFork,
-       kRsrcFork,
-       kDirectory
-};

 
 /* number of locked buffer caches to hold for b-tree meta data */
 #define kMaxLockedMetaBuffers          32              
 
 
 /* number of locked buffer caches to hold for b-tree meta data */
 #define kMaxLockedMetaBuffers          32              
 

-/*
- *     File type and creator for symbolic links
- */
-enum {
-       kSymLinkFileType  = 0x736C6E6B, /* 'slnk' */
-       kSymLinkCreator   = 0x72686170  /* 'rhap' */
-};
-
-

 extern struct timezone gTimeZone;
 
 
 extern struct timezone gTimeZone;
 
 


@@ -104,259 +99,372 @@ extern struct timezone gTimeZone;
  * superuser may continue to allocate blocks.
  */
 #define HFS_MINFREE            1
  * superuser may continue to allocate blocks.
  */
 #define HFS_MINFREE            1

-#define HFS_MAXRESERVE         (u_int64_t)(250*1024*1024)
-
-/* Internal Data structures*/
-
-struct vcb_t {
-    u_int16_t                  vcbSigWord;
-    int16_t                    vcbAtrb;
-    int16_t                    vcbFlags;
-    int16_t                    vcbspare;
-    u_int32_t                  vcbJinfoBlock;
-
-    u_int32_t                  vcbCrDate;
-    u_int32_t                  vcbLsMod;
-    u_int32_t                  vcbVolBkUp;
-
-    int32_t                    vcbFilCnt;
-    int32_t                    vcbDirCnt;
-    u_int32_t                  blockSize;      /* size of allocation blocks */
-    u_int32_t                  totalBlocks;    /* total allocation blocks */
-    u_int32_t                  freeBlocks;     /* free allocation blocks */
-    u_int32_t                  nextAllocation; /* start of next allocation search */
-    int32_t                    vcbClpSiz;
-    u_int32_t                  vcbNxtCNID;
-       u_int32_t               vcbCNIDGen;
-       int32_t                 vcbWrCnt;
-
-    int32_t                    vcbFndrInfo[8];
-
-    u_int64_t                  encodingsBitmap;        /* HFS Plus only */
-
-    u_int16_t                  vcbNmFls;               /* HFS only */
-    u_int16_t                  vcbNmRtDirs;            /* HFS only */
-    int16_t                    vcbVBMSt;               /* HFS only */
-    int16_t                    vcbAlBlSt;              /* HFS only */
-
-    struct vnode *             extentsRefNum;
-    struct vnode *             catalogRefNum;
-    struct vnode *             allocationsRefNum;
-
-    u_int8_t                   vcbVN[256];             /* volume name in UTF-8 */
-    u_int32_t                  volumeNameEncodingHint;
-    u_int32_t                  hfsPlusIOPosOffset;     /* Disk block where HFS+ starts */
-    u_int32_t                  vcbVBMIOSize;           /* volume bitmap I/O size */
-
-    /* cache of largest known free extents */
-    u_int32_t                  vcbFreeExtCnt;
-    HFSPlusExtentDescriptor vcbFreeExt[kMaxFreeExtents];
-
-    u_int32_t          reserveBlocks;          /* free block reserve */
-    u_int32_t          loanedBlocks;           /* blocks on loan for delayed allocations */
-
-    u_int32_t                  localCreateDate;        /* creation times for HFS+ volumes are in local time */
-    simple_lock_data_t vcbSimpleLock;          /* simple lock to allow concurrent access to vcb data */
-};
-typedef struct vcb_t ExtendedVCB;
-
-
-#define kHFS_DamagedVolume  0x1        /* This volume has errors, unmount dirty */
-
-/* XXX */
-#define MARK_VOLUMEDAMAGED(fcb) 
+#define HFS_MAXRESERVE         ((u_int64_t)(250*1024*1024))

 
 /*
 
 /*

- * NOTE: The code relies on being able to cast an ExtendedVCB* to a vfsVCB* in order
- *      to gain access to the mount point pointer from a pointer
- *      to an ExtendedVCB.  DO NOT INSERT OTHER FIELDS BEFORE THE vcb FIELD!!
- *
- * vcbFlags, vcbLsMod, vcbFilCnt, vcbDirCnt, vcbNxtCNID, etc
- * are locked by the hfs_lock simple lock.
+ * The system distinguishes between the desirable low-disk
+ * notifiaction levels for root volumes and non-root volumes.
+ * The various thresholds are computed as a fraction of the
+ * volume size, all capped at a certain fixed level

  */
  */

-typedef struct vfsVCB {
-    ExtendedVCB                        vcb_vcb;
-    struct hfsmount            *vcb_hfsmp;                             /* Pointer to hfsmount structure */
-} vfsVCB_t;
-
+ 
+#define HFS_ROOTVERYLOWDISKTRIGGERFRACTION 5
+#define HFS_ROOTVERYLOWDISKTRIGGERLEVEL ((u_int64_t)(125*1024*1024))
+#define HFS_ROOTLOWDISKTRIGGERFRACTION 10
+#define HFS_ROOTLOWDISKTRIGGERLEVEL ((u_int64_t)(250*1024*1024))
+#define HFS_ROOTLOWDISKSHUTOFFFRACTION 11
+#define HFS_ROOTLOWDISKSHUTOFFLEVEL ((u_int64_t)(375*1024*1024))
+
+#define HFS_VERYLOWDISKTRIGGERFRACTION 1
+#define HFS_VERYLOWDISKTRIGGERLEVEL ((u_int64_t)(100*1024*1024))
+#define HFS_LOWDISKTRIGGERFRACTION 2
+#define HFS_LOWDISKTRIGGERLEVEL ((u_int64_t)(150*1024*1024))
+#define HFS_LOWDISKSHUTOFFFRACTION 3
+#define HFS_LOWDISKSHUTOFFLEVEL ((u_int64_t)(200*1024*1024))

 
 

+/* Internal Data structures*/

 
 /* This structure describes the HFS specific mount structure data. */
 typedef struct hfsmount {
 
 /* This structure describes the HFS specific mount structure data. */
 typedef struct hfsmount {

-       u_int8_t                        hfs_fs_ronly;                   /* Whether this was mounted as read-initially  */
-       u_int8_t                        hfs_unknownpermissions; /* Whether this was mounted with MNT_UNKNOWNPERMISSIONS */
-       u_int8_t                        hfs_media_writeable;
-       u_int8_t                        hfs_orphans_cleaned;
-       
+       u_int32_t     hfs_flags;              /* see below */
+

        /* Physical Description */
        /* Physical Description */

-       u_long                          hfs_phys_block_count;   /* Num of PHYSICAL blocks of volume */
-       u_long                          hfs_phys_block_size;    /* Always a multiple of 512 */
+       u_int32_t     hfs_logical_block_size;   /* Logical block size of the disk as reported by ioctl(DKIOCGETBLOCKSIZE), always a multiple of 512 */
+       daddr64_t     hfs_logical_block_count;  /* Number of logical blocks on the disk */
+       daddr64_t     hfs_alt_id_sector;        /* location of alternate VH/MDB */
+       u_int32_t     hfs_physical_block_size;  /* Physical block size of the disk as reported by ioctl(DKIOCGETPHYSICALBLOCKSIZE) */ 
+       u_int32_t     hfs_log_per_phys;         /* Number of logical blocks per physical block size */

 
        /* Access to VFS and devices */
        struct mount            *hfs_mp;                                /* filesystem vfs structure */
        struct vnode            *hfs_devvp;                             /* block device mounted vnode */
 
        /* Access to VFS and devices */
        struct mount            *hfs_mp;                                /* filesystem vfs structure */
        struct vnode            *hfs_devvp;                             /* block device mounted vnode */

-       dev_t                           hfs_raw_dev;                    /* device mounted */
-       struct netexport        hfs_export;                             /* Export information */
-       u_int32_t                       hfs_logBlockSize;               /* Size of buffer cache buffer for I/O */
+       struct vnode *          hfs_extents_vp;
+       struct vnode *          hfs_catalog_vp;
+       struct vnode *          hfs_allocation_vp;
+       struct vnode *          hfs_attribute_vp;
+       struct vnode *          hfs_startup_vp;
+       struct vnode *          hfs_attrdata_vp;   /* pseudo file */
+       struct cnode *          hfs_extents_cp;
+       struct cnode *          hfs_catalog_cp;
+       struct cnode *          hfs_allocation_cp;
+       struct cnode *          hfs_attribute_cp;
+       struct cnode *          hfs_startup_cp;
+       dev_t                   hfs_raw_dev;                    /* device mounted */
+       u_int32_t               hfs_logBlockSize;               /* Size of buffer cache buffer for I/O */

        
        /* Default values for HFS standard and non-init access */
        
        /* Default values for HFS standard and non-init access */

-       uid_t                           hfs_uid;                                /* uid to set as owner of the files */
-       gid_t                           hfs_gid;                                /* gid to set as owner of the files */
-       mode_t                          hfs_dir_mask;                   /* mask to and with directory protection bits */
-       mode_t                          hfs_file_mask;                  /* mask to and with file protection bits */
-       u_long                          hfs_encoding;                   /* Defualt encoding for non hfs+ volumes */     
-
-       /* simple lock for shared meta renaming */
-       simple_lock_data_t      hfs_renamelock;
-
-       /* HFS Specific */
-       struct vfsVCB           hfs_vcb;
-       struct cat_desc         hfs_privdir_desc;
-       struct cat_attr         hfs_privdir_attr;
+       uid_t         hfs_uid;            /* uid to set as owner of the files */
+       gid_t         hfs_gid;            /* gid to set as owner of the files */
+       mode_t        hfs_dir_mask;       /* mask to and with directory protection bits */
+       mode_t        hfs_file_mask;      /* mask to and with file protection bits */
+       u_int32_t        hfs_encoding;       /* Default encoding for non hfs+ volumes */        
+
+       /* Persistent fields (on disk, dynamic) */
+       time_t        hfs_mtime;          /* file system last modification time */
+       u_int32_t     hfs_filecount;      /* number of files in file system */
+       u_int32_t     hfs_dircount;       /* number of directories in file system */
+       u_int32_t     freeBlocks;         /* free allocation blocks */
+       u_int32_t     nextAllocation;     /* start of next allocation search */
+       u_int32_t     sparseAllocation;   /* start of allocations for sparse devices */
+       u_int32_t     vcbNxtCNID;         /* next unused catalog node ID - protected by catalog lock */
+       u_int32_t     vcbWrCnt;           /* file system write count */
+       u_int64_t     encodingsBitmap;    /* in-use encodings */
+       u_int16_t     vcbNmFls;           /* HFS Only - root dir file count */
+       u_int16_t     vcbNmRtDirs;        /* HFS Only - root dir directory count */
+
+       /* Persistent fields (on disk, static) */
+       u_int16_t                       vcbSigWord;
+       int16_t                         vcbFlags; /* Runtime flag to indicate if volume is dirty/clean */
+       u_int32_t                       vcbAtrb;
+       u_int32_t                       vcbJinfoBlock;
+       time_t        hfs_itime;   /* file system creation time */
+       time_t        hfs_btime;   /* file system last backup time */
+       u_int32_t                       blockSize;      /* size of allocation blocks */
+       u_int32_t                       totalBlocks;    /* total allocation blocks */
+       u_int32_t                       allocLimit;     /* Do not allocate this block or beyond */
+       /*
+        * NOTE: When resizing a volume to make it smaller, allocLimit is set to the allocation
+        * block number which will contain the new alternate volume header.  At all other times,
+        * allocLimit is set to totalBlocks.  The allocation code uses allocLimit instead of
+        * totalBlocks to limit which blocks may be allocated, so that during a resize, we don't
+        * put new content into the blocks we're trying to truncate away.
+        */
+       int32_t                         vcbClpSiz;
+       u_int32_t     vcbFndrInfo[8];
+       int16_t                         vcbVBMSt;               /* HFS only */
+       int16_t                         vcbAlBlSt;              /* HFS only */
+
+       /* vcb stuff */
+       u_int8_t                        vcbVN[256];             /* volume name in UTF-8 */
+       u_int32_t                       volumeNameEncodingHint;
+       u_int32_t                       hfsPlusIOPosOffset;     /* Disk block where HFS+ starts */
+       u_int32_t                       vcbVBMIOSize;           /* volume bitmap I/O size */
+       
+       /* cache of largest known free extents */
+       u_int32_t                       vcbFreeExtCnt;
+       HFSPlusExtentDescriptor vcbFreeExt[kMaxFreeExtents];
+       
+       u_int32_t               reserveBlocks;          /* free block reserve */
+       u_int32_t               loanedBlocks;           /* blocks on loan for delayed allocations */
+       
+       u_int32_t                       localCreateDate;        /* creation times for HFS+ volumes are in local time */
+
+       /*
+        * HFS+ Private system directories (two). Any access
+        * (besides looking at the cd_cnid) requires holding
+        * the Catalog File lock.
+        */
+       struct cat_desc     hfs_private_desc[2];
+       struct cat_attr     hfs_private_attr[2];
+

        u_int32_t               hfs_metadata_createdate;
        hfs_to_unicode_func_t   hfs_get_unicode;
        unicode_to_hfs_func_t   hfs_get_hfsname;
  
        u_int32_t               hfs_metadata_createdate;
        hfs_to_unicode_func_t   hfs_get_unicode;
        unicode_to_hfs_func_t   hfs_get_hfsname;
  

+       /* Quota variables: */

        struct quotafile        hfs_qfiles[MAXQUOTAS];    /* quota files */
 
        struct quotafile        hfs_qfiles[MAXQUOTAS];    /* quota files */
 

-       // XXXdbg
+       /* Journaling variables: */

        void                *jnl;           // the journal for this volume (if one exists)
        struct vnode        *jvp;           // device where the journal lives (may be equal to devvp)
        u_int32_t            jnl_start;     // start block of the journal file (so we don't delete it)
        void                *jnl;           // the journal for this volume (if one exists)
        struct vnode        *jvp;           // device where the journal lives (may be equal to devvp)
        u_int32_t            jnl_start;     // start block of the journal file (so we don't delete it)

+       u_int32_t            jnl_size;

        u_int32_t            hfs_jnlfileid;
        u_int32_t            hfs_jnlinfoblkid;
        u_int32_t            hfs_jnlfileid;
        u_int32_t            hfs_jnlinfoblkid;

-    volatile int         readers;
-       volatile int         blocker;
+       lck_rw_t             hfs_global_lock;
+       u_int32_t            hfs_global_lock_nesting;
+       
+       /* Notification variables: */
+       u_int32_t               hfs_notification_conditions;
+       u_int32_t               hfs_freespace_notify_dangerlimit;
+       u_int32_t               hfs_freespace_notify_warninglimit;
+       u_int32_t               hfs_freespace_notify_desiredlevel;
+
+       /* time mounted and last mounted mod time "snapshot" */
+       time_t          hfs_mount_time;
+       time_t          hfs_last_mounted_mtime;
+
+       /* Metadata allocation zone variables: */
+       u_int32_t       hfs_metazone_start;
+       u_int32_t       hfs_metazone_end;
+       u_int32_t       hfs_hotfile_start;
+       u_int32_t       hfs_hotfile_end;
+        u_int32_t       hfs_min_alloc_start;
+       u_int32_t       hfs_freed_block_count;
+       int             hfs_hotfile_freeblks;
+       int             hfs_hotfile_maxblks;
+       int             hfs_overflow_maxblks;
+       int             hfs_catalog_maxblks;
+
+       /* Hot File Clustering variables: */
+       lck_mtx_t       hfc_mutex;      /* serialize hot file stages */
+       enum hfc_stage  hfc_stage;      /* what are we up to... */
+       time_t          hfc_timebase;   /* recording period start time */
+       time_t          hfc_timeout;    /* recording period stop time */
+       void *          hfc_recdata;    /* recording data (opaque) */
+       int             hfc_maxfiles;   /* maximum files to track */
+       struct vnode *  hfc_filevp;
+
+#ifdef HFS_SPARSE_DEV
+       /* Sparse device variables: */
+       struct vnode * hfs_backingfs_rootvp;
+       u_int32_t      hfs_last_backingstatfs;
+       int            hfs_sparsebandblks;
+       u_int64_t      hfs_backingfs_maxblocks;
+#endif
+       size_t         hfs_max_inline_attrsize;
+
+       lck_mtx_t      hfs_mutex;      /* protects access to hfsmount data */
+       void          *hfs_freezing_proc;  /* who froze the fs */
+       void          *hfs_downgrading_proc; /* process who's downgrading to rdonly */
+       lck_rw_t       hfs_insync;     /* protects sync/freeze interaction */
+
+       /* Resize variables: */
+       u_int32_t               hfs_resize_filesmoved;
+       u_int32_t               hfs_resize_totalfiles;
+
+       /* Per mount cnode hash variables: */
+       lck_mtx_t      hfs_chash_mutex; /* protects access to cnode hash table */
+       u_long         hfs_cnodehash;   /* size of cnode hash table - 1 */
+       LIST_HEAD(cnodehashhead, cnode) *hfs_cnodehashtbl;      /* base of cnode hash */
+                                       
+
+       /*
+        * About the sync counters:
+        * hfs_sync_scheduled  keeps track whether a timer was scheduled but we
+        *                     haven't started processing the callback (i.e. we
+        *                     haven't begun the flush).  This will be non-zero
+        *                     even if the callback has been invoked, before we
+        *                    start the flush.
+        * hfs_sync_incomplete keeps track of the number of callbacks that have
+        *                     not completed yet (including callbacks not yet
+        *                     invoked).  We cannot safely unmount until this
+        *                     drops to zero.
+        *
+        * In both cases, we use counters, not flags, so that we can avoid
+        * taking locks.
+        */
+       int32_t         hfs_sync_scheduled;
+       int32_t         hfs_sync_incomplete;
+       u_int64_t       hfs_last_sync_request_time;
+       u_int64_t       hfs_last_sync_time;
+       u_int32_t       hfs_active_threads;
+       u_int64_t       hfs_max_pending_io;
+                                       
+       thread_call_t   hfs_syncer;           // removeable devices get sync'ed by this guy
+

 } hfsmount_t;
 
 } hfsmount_t;
 

-#define hfs_private_metadata_dir       hfs_privdir_desc.cd_cnid
-
-#define hfs_global_shared_lock_acquire(hfsmp)    \
-    do { \
-       if (hfsmp->blocker) { \
-              tsleep((caddr_t)&hfsmp->blocker, PRIBIO, "journal_blocker", 0); \
-           continue; \
-          } \
-          hfsmp->readers++; \
-       break; \
-       } while (1)
-
-#define hfs_global_shared_lock_release(hfsmp)    \
-    do { \
-           hfsmp->readers--; \
-           if (hfsmp->readers == 0) { \
-               wakeup((caddr_t)&hfsmp->readers); \
-        } \
-    } while (0)
-
-#define hfs_global_exclusive_lock_acquire(hfsmp) \
-    do { \
-       if (hfsmp->blocker) { \
-              tsleep((caddr_t)&hfsmp->blocker, PRIBIO, "journal_blocker", 0); \
-           continue; \
-          } \
-       if (hfsmp->readers != 0) { \
-              tsleep((caddr_t)&hfsmp->readers, PRIBIO, "journal_enable/disble", 0); \
-           continue; \
-       } \
-       hfsmp->blocker = 1; \
-       break; \
-       } while (1)
-     
-#define hfs_global_exclusive_lock_release(hfsmp) \
-    hfsmp->blocker = 0; \
-       wakeup((caddr_t)&hfsmp->blocker)
-
-#define MAXHFSVNODELEN         31
+#define HFS_META_DELAY     (100)
+#define HFS_MILLISEC_SCALE (1000*1000)
+
+typedef hfsmount_t  ExtendedVCB;
+
+/* Aliases for legacy (Mac OS 9) field names */
+#define vcbCrDate          hfs_itime
+#define vcbLsMod           hfs_mtime
+#define vcbVolBkUp         hfs_btime
+#define extentsRefNum      hfs_extents_vp
+#define catalogRefNum      hfs_catalog_vp
+#define allocationsRefNum  hfs_allocation_vp
+#define vcbFilCnt          hfs_filecount
+#define vcbDirCnt          hfs_dircount
+
+/* Inline functions to set/reset vcbFlags.  Upper 8 bits indicate if the volume 
+ * header/VCB is clean/dirty --- if set, volume header is dirty, and 
+ * if clear, volume header is clean.  This value is checked to determine
+ * if the in-memory copy of volume header should be flushed to the disk
+ * or not. 
+ */
+/* Set runtime flag to indicate that volume is dirty */
+static __inline__ void MarkVCBDirty(ExtendedVCB *vcb)
+{ 
+       vcb->vcbFlags |= 0xFF00;
+}

 
 

+/* Clear runtime flag to indicate that volume is dirty */
+static __inline__ void MarkVCBClean(ExtendedVCB *vcb)
+{
+       vcb->vcbFlags &= 0x00FF;
+}

 
 

-typedef struct filefork FCB;
+/* Check runtime flag to determine if the volume is dirty or not */
+static __inline__ Boolean IsVCBDirty(ExtendedVCB *vcb)
+{
+       return (vcb->vcbFlags & 0xFF00 ? true  : false);
+}

 
 

+/*
+ * There are two private directories in HFS+.
+ *
+ * One contains inodes for files that are hardlinked or open/unlinked.
+ * The other contains inodes for directories that are hardlinked.
+ */
+enum privdirtype {FILE_HARDLINKS, DIR_HARDLINKS};
+
+
+/* HFS mount point flags */
+#define HFS_READ_ONLY             0x00001
+#define HFS_UNKNOWN_PERMS         0x00002
+#define HFS_WRITEABLE_MEDIA       0x00004
+#define HFS_CLEANED_ORPHANS       0x00008
+#define HFS_X                     0x00010
+#define HFS_CASE_SENSITIVE        0x00020
+#define HFS_STANDARD              0x00040
+#define HFS_METADATA_ZONE         0x00080
+#define HFS_FRAGMENTED_FREESPACE  0x00100
+#define HFS_NEED_JNL_RESET        0x00200
+#define HFS_HAS_SPARSE_DEVICE     0x00400
+#define HFS_RESIZE_IN_PROGRESS    0x00800
+#define HFS_QUOTAS                0x01000
+#define HFS_CREATING_BTREE        0x02000
+/* When set, do not update nextAllocation in the mount structure */
+#define HFS_SKIP_UPDATE_NEXT_ALLOCATION 0x04000        
+#define HFS_XATTR_EXTENTS         0x08000      
+#define        HFS_FOLDERCOUNT           0x10000
+/* When set, the file system exists on a virtual device, like disk image */
+#define HFS_VIRTUAL_DEVICE        0x20000
+/* When set, we're in hfs_changefs, so hfs_sync should do nothing. */
+#define HFS_IN_CHANGEFS           0x40000
+/* When set, we are in process of downgrading or have downgraded to read-only, 
+ * so hfs_start_transaction should return EROFS.
+ */
+#define HFS_RDONLY_DOWNGRADE      0x80000
+#define HFS_DID_CONTIG_SCAN      0x100000

 
 

-#define MAKE_INODE_NAME(name,linkno) \
-           (void) sprintf((name), "%s%d", HFS_INODE_PREFIX, (linkno))

 
 

-/*
- *     Write check macro
+/* Macro to update next allocation block in the HFS mount structure.  If 
+ * the HFS_SKIP_UPDATE_NEXT_ALLOCATION is set, do not update 
+ * nextAllocation block.

  */
  */

-#define        WRITE_CK(VNODE, FUNC_NAME)      {                               \
-    if ((VNODE)->v_mount->mnt_flag & MNT_RDONLY) {                     \
-        DBG_ERR(("%s: ATTEMPT TO WRITE A READONLY VOLUME\n",   \
-                 FUNC_NAME));  \
-                     return(EROFS);                                                    \
-    }                                                                  \
-}
+#define HFS_UPDATE_NEXT_ALLOCATION(hfsmp, new_nextAllocation)                  \
+       {                                                               \
+               if ((hfsmp->hfs_flags & HFS_SKIP_UPDATE_NEXT_ALLOCATION) == 0)\
+                       hfsmp->nextAllocation = new_nextAllocation;     \
+       }                                                               \
+
+#define HFS_MOUNT_LOCK(hfsmp, metadata)                      \
+       {                                                    \
+               if ((metadata) && 1)                         \
+                       lck_mtx_lock(&(hfsmp)->hfs_mutex);   \
+       }                                                    \
+
+#define HFS_MOUNT_UNLOCK(hfsmp, metadata)                    \
+       {                                                    \
+               if ((metadata) && 1)                         \
+                       lck_mtx_unlock(&(hfsmp)->hfs_mutex); \
+       }                                                    \
+
+#define hfs_global_exclusive_lock_acquire(hfsmp) lck_rw_lock_exclusive(&(hfsmp)->hfs_global_lock)
+#define hfs_global_exclusive_lock_release(hfsmp) lck_rw_unlock_exclusive(&(hfsmp)->hfs_global_lock)
+
+/* Macro for incrementing and decrementing the folder count in a cnode 
+ * attribute only if the HFS_FOLDERCOUNT bit is set in the mount flags 
+ * and kHFSHasFolderCount bit is set in the cnode flags.  Currently these 
+ * bits are only set for case sensitive HFS+ volumes.
+ */
+#define INC_FOLDERCOUNT(hfsmp, cattr)                          \
+       if ((hfsmp->hfs_flags & HFS_FOLDERCOUNT) &&             \
+           (cattr.ca_recflags & kHFSHasFolderCountMask)) {     \
+               cattr.ca_dircount++;                            \
+       }                                                       \
+
+#define DEC_FOLDERCOUNT(hfsmp, cattr)                          \
+       if ((hfsmp->hfs_flags & HFS_FOLDERCOUNT) &&             \
+           (cattr.ca_recflags & kHFSHasFolderCountMask) &&     \
+           (cattr.ca_dircount > 0)) {                          \
+               cattr.ca_dircount--;                            \
+       }                                                       \

 
 

-/* structure to hold a "." or ".." directory entry (12 bytes) */
-typedef struct hfsdotentry {
-       u_int32_t       d_fileno;       /* unique file number */
-       u_int16_t       d_reclen;       /* length of this structure */
-       u_int8_t        d_type;         /* dirent file type */
-       u_int8_t        d_namelen;      /* len of filename */
-       char            d_name[4];      /* "." or ".." */
-} hfsdotentry;
+typedef struct filefork FCB;

 
 

-#define HFS_AVERAGE_NAME_SIZE  22
-#define AVERAGE_HFSDIRENTRY_SIZE  (8+HFS_AVERAGE_NAME_SIZE+4)
-#define MAX_HFSDIRENTRY_SIZE   sizeof(struct dirent)
+/*
+ * Macros for creating item names for our special/private directories.
+ */
+#define MAKE_INODE_NAME(name, size, linkno) \
+           (void) snprintf((name), size, "%s%d", HFS_INODE_PREFIX, (linkno))
+#define HFS_INODE_PREFIX_LEN   5

 
 

-#define DIRENTRY_SIZE(namlen) \
-    ((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen)+1 + 3) &~ 3))
+#define MAKE_DIRINODE_NAME(name, size, linkno) \
+           (void) snprintf((name), size, "%s%d", HFS_DIRINODE_PREFIX, (linkno))
+#define HFS_DIRINODE_PREFIX_LEN   4

 
 

+#define MAKE_DELETED_NAME(NAME, size, FID) \
+           (void) snprintf((NAME), size, "%s%d", HFS_DELETE_PREFIX, (FID))
+#define HFS_DELETE_PREFIX_LEN  4

 
 

-enum {
-       kCatalogFolderNode = 1,
-       kCatalogFileNode = 2
-};

 
 

-/* 
- * CatalogNodeData has same layout as the on-disk HFS Plus file/dir records.
- * Classic hfs file/dir records are converted to match this layout.
- * 
- * The cnd_extra padding allows big hfs plus thread records (520 bytes max)
- * to be read onto this stucture during a cnid lookup.
- *
- */
-struct CatalogNodeData {
-       int16_t                 cnd_type;
-       u_int16_t               cnd_flags;
-       u_int32_t               cnd_valence;    /* dirs only */
-       u_int32_t               cnd_nodeID;
-       u_int32_t               cnd_createDate;
-       u_int32_t               cnd_contentModDate;
-       u_int32_t               cnd_attributeModDate;
-       u_int32_t               cnd_accessDate;
-       u_int32_t               cnd_backupDate;
-       u_int32_t               cnd_ownerID;
-       u_int32_t               cnd_groupID;
-       u_int8_t                cnd_adminFlags;  /* super-user changeable flags */
-       u_int8_t                cnd_ownerFlags;  /* owner changeable flags */
-       u_int16_t               cnd_mode;        /* file type + permission bits */
-       union {
-           u_int32_t   cndu_iNodeNum;   /* indirect links only */
-           u_int32_t   cndu_linkCount;  /* indirect nodes only */
-           u_int32_t   cndu_rawDevice;  /* special files (FBLK and FCHR) only */
-       } cnd_un;
-       u_int8_t                cnd_finderInfo[32];
-       u_int32_t               cnd_textEncoding;
-       u_int32_t               cnd_reserved;
-       HFSPlusForkData cnd_datafork;
-       HFSPlusForkData cnd_rsrcfork;
-       u_int32_t       cnd_iNodeNumCopy;
-       u_int32_t       cnd_linkCNID;   /* for hard links only */
-       u_int8_t        cnd_extra[264]; /* make struct at least 520 bytes long */
-};
-typedef struct CatalogNodeData CatalogNodeData;
-
-#define        cnd_iNodeNum            cnd_un.cndu_iNodeNum
-#define        cnd_linkCount           cnd_un.cndu_linkCount
-#define        cnd_rawDevice           cnd_un.cndu_rawDevice
+#define HFS_AVERAGE_NAME_SIZE  22
+#define AVERAGE_HFSDIRENTRY_SIZE  (8+HFS_AVERAGE_NAME_SIZE+4)

 
 

+#define STD_DIRENT_LEN(namlen) \
+       ((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen)+1 + 3) &~ 3))

 
 

+#define EXT_DIRENT_LEN(namlen) \
+       ((sizeof(struct direntry) + (namlen) - (MAXPATHLEN-1) + 3) & ~3)

 
 

-enum { kHFSPlusMaxFileNameBytes = kHFSPlusMaxFileNameChars * 3 };

 
 

-enum { kdirentMaxNameBytes = NAME_MAX };
+enum { kHFSPlusMaxFileNameBytes = kHFSPlusMaxFileNameChars * 3 };

 
 
 /* macro to determine if hfs or hfsplus */
 
 
 /* macro to determine if hfs or hfsplus */


@@ -367,25 +475,25 @@ enum { kdirentMaxNameBytes = NAME_MAX };
 /*
  * Various ways to acquire a VFS mount point pointer:
  */
 /*
  * Various ways to acquire a VFS mount point pointer:
  */

-#define VTOVFS(VP) ((VP)->v_mount)
+#define VTOVFS(VP)  vnode_mount((VP))

 #define HFSTOVFS(HFSMP) ((HFSMP)->hfs_mp)
 #define HFSTOVFS(HFSMP) ((HFSMP)->hfs_mp)

-#define VCBTOVFS(VCB) (((struct vfsVCB *)(VCB))->vcb_hfsmp->hfs_mp)
+#define VCBTOVFS(VCB)   HFSTOVFS(VCB)

 
 /*
  * Various ways to acquire an HFS mount point pointer:
  */
 
 /*
  * Various ways to acquire an HFS mount point pointer:
  */

-#define VTOHFS(VP) ((struct hfsmount *)((VP)->v_mount->mnt_data))
-#define        VFSTOHFS(MP) ((struct hfsmount *)(MP)->mnt_data)        
-#define VCBTOHFS(VCB) (((struct vfsVCB *)(VCB))->vcb_hfsmp)
-#define FCBTOHFS(FCB) ((struct hfsmount *)(FCB)->ff_cp->c_vp->v_mount->mnt_data)
+#define VTOHFS(VP)  ((struct hfsmount *)vfs_fsprivate(vnode_mount((VP))))
+#define        VFSTOHFS(MP)  ((struct hfsmount *)vfs_fsprivate((MP)))
+#define VCBTOHFS(VCB) (VCB)
+#define FCBTOHFS(FCB)  ((struct hfsmount *)vfs_fsprivate(vnode_mount((FCB)->ff_cp->c_vp)))

 
 /*
 
 /*

- * Various ways to acquire a VCB pointer:
+ * Various ways to acquire a VCB (legacy) pointer:

  */
  */

-#define VTOVCB(VP) (&(((struct hfsmount *)((VP)->v_mount->mnt_data))->hfs_vcb.vcb_vcb))
-#define VFSTOVCB(MP) (&(((struct hfsmount *)(MP)->mnt_data)->hfs_vcb.vcb_vcb))
-#define HFSTOVCB(HFSMP) (&(HFSMP)->hfs_vcb.vcb_vcb)
-#define FCBTOVCB(FCB) (&(((struct hfsmount *)((FCB)->ff_cp->c_vp->v_mount->mnt_data))->hfs_vcb.vcb_vcb))
+#define VTOVCB(VP)       VTOHFS(VP)
+#define VFSTOVCB(MP)     VFSTOHFS(MP)
+#define HFSTOVCB(HFSMP)  (HFSMP)
+#define FCBTOVCB(FCB)    FCBTOHFS(FCB)

 
 
 #define E_NONE 0
 
 
 #define E_NONE 0


@@ -400,6 +508,22 @@ enum { kdirentMaxNameBytes = NAME_MAX };
 #define HFS_ALT_SECTOR(blksize, blkcnt)  (((blkcnt) - 1) - (512 / (blksize)))
 #define HFS_ALT_OFFSET(blksize)          ((blksize) > 1024 ? (blksize) - 1024 : 0)
 
 #define HFS_ALT_SECTOR(blksize, blkcnt)  (((blkcnt) - 1) - (512 / (blksize)))
 #define HFS_ALT_OFFSET(blksize)          ((blksize) > 1024 ? (blksize) - 1024 : 0)
 

+/* Convert the logical sector number to be aligned on physical block size boundary.  
+ * We are assuming the partition is a multiple of physical block size.
+ */
+#define HFS_PHYSBLK_ROUNDDOWN(sector_num, log_per_phys)        ((sector_num / log_per_phys) * log_per_phys)
+
+/*
+ * HFS specific fcntl()'s
+ */
+#define HFS_BULKACCESS      (FCNTL_FS_SPECIFIC_BASE + 0x00001)
+#define HFS_GET_MOUNT_TIME  (FCNTL_FS_SPECIFIC_BASE + 0x00002)
+#define HFS_GET_LAST_MTIME  (FCNTL_FS_SPECIFIC_BASE + 0x00003)
+#define HFS_GET_BOOT_INFO   (FCNTL_FS_SPECIFIC_BASE + 0x00004)
+#define HFS_SET_BOOT_INFO   (FCNTL_FS_SPECIFIC_BASE + 0x00005)
+#define HFS_EXT_BULKACCESS  (FCNTL_FS_SPECIFIC_BASE + 0x00006)
+
+

 /*
  *     This is the straight GMT conversion constant:
  *     00:00:00 January 1, 1970 - 00:00:00 January 1, 1904
 /*
  *     This is the straight GMT conversion constant:
  *     00:00:00 January 1, 1970 - 00:00:00 January 1, 1904


@@ -408,91 +532,260 @@ enum { kdirentMaxNameBytes = NAME_MAX };
 #define MAC_GMT_FACTOR         2082844800UL
 
 
 #define MAC_GMT_FACTOR         2082844800UL
 
 

-u_int32_t to_bsd_time(u_int32_t hfs_time);
-u_int32_t to_hfs_time(u_int32_t bsd_time);
+/*****************************************************************************
+       FUNCTION PROTOTYPES 
+******************************************************************************/

 
 

-int hfs_flushfiles(struct mount *mp, int flags, struct proc *p);
-int hfs_flushvolumeheader(struct hfsmount *hfsmp, int waitfor, int altflush);
-#define HFS_ALTFLUSH   1

 
 

-short hfsUnmount(struct hfsmount *hfsmp, struct proc *p);
+/*****************************************************************************
+       hfs_vnop_xxx functions from different files 
+******************************************************************************/
+int hfs_vnop_readdirattr(struct vnop_readdirattr_args *);  /* in hfs_attrlist.c */

 
 

+int hfs_vnop_inactive(struct vnop_inactive_args *);        /* in hfs_cnode.c */
+int hfs_vnop_reclaim(struct vnop_reclaim_args *);          /* in hfs_cnode.c */

 
 

-extern int hfs_getcnode(struct hfsmount *hfsmp, cnid_t cnid, struct cat_desc *descp,
-                       int wantrsrc, struct cat_attr *attrp, struct cat_fork *forkp,
-                       struct vnode **vpp);
+int hfs_vnop_link(struct vnop_link_args *);                /* in hfs_link.c */

 
 

-extern int hfs_getnewvnode(struct hfsmount *hfsmp, struct cnode *cp,
-                           struct cat_desc *descp, int wantrsrc, struct cat_attr *attrp,
-                           struct cat_fork *forkp, struct vnode **vpp);
+int hfs_vnop_lookup(struct vnop_lookup_args *);            /* in hfs_lookup.c */

 
 

-extern int hfs_metafilelocking(struct hfsmount *hfsmp, u_long fileID, u_int flags, struct proc *p);
+int hfs_vnop_search(struct vnop_searchfs_args *);          /* in hfs_search.c */

 
 

-extern u_int32_t hfs_freeblks(struct hfsmount * hfsmp, int wantreserve);
+int hfs_vnop_read(struct vnop_read_args *);           /* in hfs_readwrite.c */
+int hfs_vnop_write(struct vnop_write_args *);         /* in hfs_readwrite.c */
+int hfs_vnop_ioctl(struct vnop_ioctl_args *);         /* in hfs_readwrite.c */
+int hfs_vnop_select(struct vnop_select_args *);       /* in hfs_readwrite.c */
+int hfs_vnop_strategy(struct vnop_strategy_args *);   /* in hfs_readwrite.c */
+int hfs_vnop_allocate(struct vnop_allocate_args *);   /* in hfs_readwrite.c */
+int hfs_vnop_pagein(struct vnop_pagein_args *);       /* in hfs_readwrite.c */
+int hfs_vnop_pageout(struct vnop_pageout_args *);     /* in hfs_readwrite.c */
+int hfs_vnop_bwrite(struct vnop_bwrite_args *);       /* in hfs_readwrite.c */
+int hfs_vnop_blktooff(struct vnop_blktooff_args *);   /* in hfs_readwrite.c */
+int hfs_vnop_offtoblk(struct vnop_offtoblk_args *);   /* in hfs_readwrite.c */
+int hfs_vnop_blockmap(struct vnop_blockmap_args *);   /* in hfs_readwrite.c */

 
 

-extern void hfs_remove_orphans(struct hfsmount *);
+int hfs_vnop_getxattr(struct vnop_getxattr_args *);        /* in hfs_xattr.c */
+int hfs_vnop_setxattr(struct vnop_setxattr_args *);        /* in hfs_xattr.c */
+int hfs_vnop_removexattr(struct vnop_removexattr_args *);  /* in hfs_xattr.c */
+int hfs_vnop_listxattr(struct vnop_listxattr_args *);      /* in hfs_xattr.c */
+#if NAMEDSTREAMS
+extern int hfs_vnop_getnamedstream(struct vnop_getnamedstream_args*);
+extern int hfs_vnop_makenamedstream(struct vnop_makenamedstream_args*);
+extern int hfs_vnop_removenamedstream(struct vnop_removenamedstream_args*);
+#endif

 
 
 
 

-short MacToVFSError(OSErr err);
-
-extern int hfs_owner_rights(struct hfsmount *hfsmp, uid_t cnode_uid, struct ucred *cred,
-               struct proc *p, int invokesuperuserstatus);
-
-u_long FindMetaDataDirectory(ExtendedVCB *vcb);
+/*****************************************************************************
+       Functions from MacOSStubs.c
+******************************************************************************/
+time_t to_bsd_time(u_int32_t hfs_time);

 
 

-#define  kMaxSecsForFsync      5
-#define  HFS_SYNCTRANS         1
+u_int32_t to_hfs_time(time_t bsd_time);

 
 

-extern int hfs_btsync(struct vnode *vp, int sync_transaction);
-// used as a callback by the journaling code
-extern void hfs_sync_metadata(void *arg);

 
 

-short make_dir_entry(FCB **fileptr, char *name, u_int32_t fileID);
+/*****************************************************************************
+       Functions from hfs_encodinghint.c
+******************************************************************************/
+u_int32_t hfs_pickencoding(const u_int16_t *src, int len);

 
 

+u_int32_t hfs_getencodingbias(void);

 
 

-unsigned long BestBlockSizeFit(unsigned long allocationBlockSize,
-                               unsigned long blockSizeLimit,
-                               unsigned long baseMultiple);
+void hfs_setencodingbias(u_int32_t bias);

 
 

-OSErr  hfs_MountHFSVolume(struct hfsmount *hfsmp, HFSMasterDirectoryBlock *mdb,
-               struct proc *p);
-OSErr  hfs_MountHFSPlusVolume(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
-               off_t embeddedOffset, u_int64_t disksize, struct proc *p, void *args);

 
 

-extern int     hfs_early_journal_init(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
-                                                          void *_args, int embeddedOffset, int mdb_offset,
-                                                          HFSMasterDirectoryBlock *mdbp, struct ucred *cred);
-extern u_long  GetFileInfo(ExtendedVCB *vcb, u_int32_t dirid, char *name,
-                                       struct cat_attr *fattr, struct cat_fork *forkinfo);
+/*****************************************************************************
+       Functions from hfs_encodings.c
+******************************************************************************/
+void hfs_converterinit(void);

 
 int hfs_getconverter(u_int32_t encoding, hfs_to_unicode_func_t *get_unicode,
                     unicode_to_hfs_func_t *get_hfsname);
 
 int hfs_relconverter(u_int32_t encoding);
 
 
 int hfs_getconverter(u_int32_t encoding, hfs_to_unicode_func_t *get_unicode,
                     unicode_to_hfs_func_t *get_hfsname);
 
 int hfs_relconverter(u_int32_t encoding);
 

-int hfs_to_utf8(ExtendedVCB *vcb, Str31 hfs_str, ByteCount maxDstLen,
+int hfs_to_utf8(ExtendedVCB *vcb, const Str31 hfs_str, ByteCount maxDstLen,

                ByteCount *actualDstLen, unsigned char* dstStr);
 
 int utf8_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, const unsigned char* srcStr,
                Str31 dstStr);
 
                ByteCount *actualDstLen, unsigned char* dstStr);
 
 int utf8_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, const unsigned char* srcStr,
                Str31 dstStr);
 

-int mac_roman_to_utf8(Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen,
+int mac_roman_to_utf8(const Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen,

                unsigned char* dstStr);
 
 int utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr);
 
                unsigned char* dstStr);
 
 int utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr);
 

-u_int32_t hfs_pickencoding(const u_int16_t *src, int len);
+int mac_roman_to_unicode(const Str31 hfs_str, UniChar *uni_str, u_int32_t maxCharLen, u_int32_t *usedCharLen);

 
 

-enum volop {VOL_UPDATE, VOL_MKDIR, VOL_RMDIR, VOL_MKFILE, VOL_RMFILE};
+int unicode_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, u_int16_t* srcStr, Str31 dstStr, int retry);

 
 

-extern int hfs_volupdate(struct hfsmount *hfsmp, enum volop op, int inroot);
+
+/*****************************************************************************
+       Functions from hfs_notifications.c
+******************************************************************************/
+void hfs_generate_volume_notifications(struct hfsmount *hfsmp);
+
+
+/*****************************************************************************
+       Functions from hfs_readwrite.c
+******************************************************************************/
+extern int  hfs_relocate(struct  vnode *, u_int32_t, kauth_cred_t, struct  proc *);
+
+extern int hfs_truncate(struct vnode *, off_t, int, int, int, vfs_context_t);
+
+extern int hfs_bmap(struct vnode *, daddr_t, struct vnode **, daddr64_t *, unsigned int *);
+
+extern int hfs_fsync(struct vnode *, int, int, struct proc *);
+
+extern int hfs_access(struct vnode *, mode_t, kauth_cred_t, struct proc *);
+
+extern int hfs_removeallattr(struct hfsmount *hfsmp, u_int32_t fileid);
+
+extern int hfs_set_volxattr(struct hfsmount *hfsmp, unsigned int xattrtype, int state);
+
+extern void hfs_check_volxattr(struct hfsmount *hfsmp, unsigned int xattrtype);
+
+extern int  hfs_isallocated(struct hfsmount *, u_int32_t, u_int32_t);
+
+
+/*****************************************************************************
+       Functions from hfs_vfsops.c
+******************************************************************************/
+int hfs_mountroot(mount_t mp, vnode_t rvp, vfs_context_t context);
+
+/* used as a callback by the journaling code */
+extern void hfs_sync_metadata(void *arg);
+
+extern int hfs_vget(struct hfsmount *, cnid_t, struct vnode **, int);

 
 extern void hfs_setencodingbits(struct hfsmount *hfsmp, u_int32_t encoding);
 
 
 extern void hfs_setencodingbits(struct hfsmount *hfsmp, u_int32_t encoding);
 

+enum volop {VOL_UPDATE, VOL_MKDIR, VOL_RMDIR, VOL_MKFILE, VOL_RMFILE};
+extern int hfs_volupdate(struct hfsmount *hfsmp, enum volop op, int inroot);
+
+int hfs_flushvolumeheader(struct hfsmount *hfsmp, int waitfor, int altflush);
+#define HFS_ALTFLUSH   1
+
+extern int  hfs_extendfs(struct hfsmount *, u_int64_t, vfs_context_t);
+extern int  hfs_truncatefs(struct hfsmount *, u_int64_t, vfs_context_t);
+extern int  hfs_resize_progress(struct hfsmount *, u_int32_t *);
+
+/* If a runtime corruption is detected, mark the volume inconsistent 
+ * bit in the volume attributes.
+ */
+void hfs_mark_volume_inconsistent(struct hfsmount *hfsmp);
+
+/*****************************************************************************
+       Functions from hfs_vfsutils.c
+******************************************************************************/
+u_int32_t BestBlockSizeFit(u_int32_t allocationBlockSize,
+                               u_int32_t blockSizeLimit,
+                               u_int32_t baseMultiple);
+
+OSErr  hfs_MountHFSVolume(struct hfsmount *hfsmp, HFSMasterDirectoryBlock *mdb,
+               struct proc *p);
+OSErr  hfs_MountHFSPlusVolume(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
+               off_t embeddedOffset, u_int64_t disksize, struct proc *p, void *args, kauth_cred_t cred);
+
+extern int hfsUnmount(struct hfsmount *hfsmp, struct proc *p);
+
+extern int overflow_extents(struct filefork *fp);
+
+extern int hfs_owner_rights(struct hfsmount *hfsmp, uid_t cnode_uid, kauth_cred_t cred,
+               struct proc *p, int invokesuperuserstatus);
+
+
+/* HFS System file locking */
+#define SFL_CATALOG     0x0001
+#define SFL_EXTENTS     0x0002
+#define SFL_BITMAP      0x0004
+#define SFL_ATTRIBUTE   0x0008
+#define SFL_STARTUP    0x0010
+#define SFL_VALIDMASK   (SFL_CATALOG | SFL_EXTENTS | SFL_BITMAP | SFL_ATTRIBUTE | SFL_STARTUP)
+
+extern int  hfs_systemfile_lock(struct hfsmount *, int, enum hfslocktype);
+extern void hfs_systemfile_unlock(struct hfsmount *, int);
+
+extern u_int32_t  GetFileInfo(ExtendedVCB *vcb, u_int32_t dirid, const char *name,
+                                                  struct cat_attr *fattr, struct cat_fork *forkinfo);
+
+extern void hfs_remove_orphans(struct hfsmount *);
+
+u_int32_t GetLogicalBlockSize(struct vnode *vp);
+
+extern u_int32_t hfs_freeblks(struct hfsmount * hfsmp, int wantreserve);
+
+short MacToVFSError(OSErr err);
+
+/* HFS directory hint functions. */
+extern directoryhint_t * hfs_getdirhint(struct cnode *, int, int);
+extern void  hfs_reldirhint(struct cnode *, directoryhint_t *);
+extern void  hfs_reldirhints(struct cnode *, int);
+extern void  hfs_insertdirhint(struct cnode *, directoryhint_t *);
+
+extern int hfs_namecmp(const u_int8_t *str1, size_t len1, const u_int8_t *str2, size_t len2);
+
+extern int     hfs_early_journal_init(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
+                          void *_args, off_t embeddedOffset, daddr64_t mdb_offset,
+                          HFSMasterDirectoryBlock *mdbp, kauth_cred_t cred);
+
+extern int  hfs_virtualmetafile(struct cnode *);
+
+extern int hfs_start_transaction(struct hfsmount *hfsmp);
+extern int hfs_end_transaction(struct hfsmount *hfsmp);
+extern int hfs_journal_flush(struct hfsmount *hfsmp);
+extern void hfs_sync_ejectable(struct hfsmount *hfsmp);
+
+/* Erase unused Catalog nodes due to <rdar://problem/6947811>. */
+extern int hfs_erase_unused_nodes(struct hfsmount *hfsmp);
+
+
+/*****************************************************************************
+       Functions from hfs_vnops.c
+******************************************************************************/
+int hfs_write_access(struct vnode *vp, kauth_cred_t cred, struct proc *p, Boolean considerFlags);
+
+int hfs_chmod(struct vnode *vp, int mode, kauth_cred_t cred, struct proc *p);
+
+int hfs_chown(struct vnode *vp, uid_t uid, gid_t gid, kauth_cred_t cred, struct proc *p);
+
+#define  kMaxSecsForFsync      5
+#define  HFS_SYNCTRANS         1
+extern int hfs_btsync(struct vnode *vp, int sync_transaction);

 
 extern void replace_desc(struct cnode *cp, struct cat_desc *cdp);
 
 
 extern void replace_desc(struct cnode *cp, struct cat_desc *cdp);
 

-extern int hfs_namecmp(const char *, size_t, const char *, size_t);
+extern int hfs_vgetrsrc(struct hfsmount *hfsmp, struct vnode *vp,
+                       struct vnode **rvpp, int can_drop_lock, int error_on_unlinked);
+
+extern int hfs_update(struct vnode *, int);
+
+
+/*****************************************************************************
+       Functions from hfs_xattr.c
+******************************************************************************/
+int  hfs_attrkeycompare(HFSPlusAttrKey *searchKey, HFSPlusAttrKey *trialKey);
+int  hfs_buildattrkey(u_int32_t fileID, const char *attrname, HFSPlusAttrKey *key);
+void hfs_xattr_init(struct hfsmount * hfsmp);
+int file_attribute_exist(struct hfsmount *hfsmp, uint32_t fileID);
+
+
+
+/*****************************************************************************
+       Functions from hfs_link.c
+******************************************************************************/
+
+extern int  hfs_unlink(struct hfsmount *hfsmp, struct vnode *dvp, struct vnode *vp,
+                       struct componentname *cnp, int skip_reserve);
+extern int  hfs_lookuplink(struct hfsmount *hfsmp, cnid_t linkfileid,
+                           cnid_t *prevlinkid,  cnid_t *nextlinkid);
+extern void  hfs_privatedir_init(struct hfsmount *, enum privdirtype);
+
+extern void  hfs_savelinkorigin(cnode_t *cp, cnid_t parentcnid);
+extern void  hfs_relorigins(struct cnode *cp);
+extern void  hfs_relorigin(struct cnode *cp, cnid_t parentcnid);
+extern int   hfs_haslinkorigin(cnode_t *cp);
+extern cnid_t  hfs_currentparent(cnode_t *cp);
+extern cnid_t  hfs_currentcnid(cnode_t *cp);

 
 
 #endif /* __APPLE_API_PRIVATE */
 
 
 #endif /* __APPLE_API_PRIVATE */