xnu-792.18.15.tar.gz

[apple/xnu.git] / bsd / hfs / hfs_catalog.c

/*
 * Copyright (c) 2000-2005 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
 * 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
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/dirent.h>
#include <vfs/vfs_support.h>
#include <libkern/libkern.h>

#include <sys/utfconv.h>

#include "hfs.h"
#include "hfs_catalog.h"
#include "hfs_format.h"
#include "hfs_endian.h"

#include "hfscommon/headers/BTreesInternal.h"
#include "hfscommon/headers/HFSUnicodeWrappers.h"


/*
 * Initialization of an FSBufferDescriptor structure.
 */
#define BDINIT(bd, addr) { \
        (bd).bufferAddress = (addr); \
        (bd).itemSize = sizeof(*(addr)); \
        (bd).itemCount = 1; \
}


struct btobj {
        BTreeIterator           iterator;
        HFSPlusCatalogKey       key;
        CatalogRecord           data;
};

struct update_state {
        struct cat_desc *       s_desc; 
        struct cat_attr *       s_attr;
        struct cat_fork *       s_datafork;
        struct cat_fork *       s_rsrcfork;
        struct hfsmount *       s_hfsmp;
};

struct position_state {
        int        error;
        u_int32_t  count;
        u_int32_t  index;
        u_int32_t  parentID;
        struct hfsmount *hfsmp;
};

/* Map file mode type to directory entry types */
u_char modetodirtype[16] = {
        DT_REG, DT_FIFO, DT_CHR, DT_UNKNOWN,
        DT_DIR, DT_UNKNOWN, DT_BLK, DT_UNKNOWN,
        DT_REG, DT_UNKNOWN, DT_LNK, DT_UNKNOWN,
        DT_SOCK, DT_UNKNOWN, DT_WHT, DT_UNKNOWN
};
#define MODE_TO_DT(mode)  (modetodirtype[((mode) & S_IFMT) >> 12])


static int cat_lookupbykey(struct hfsmount *hfsmp, CatalogKey *keyp, u_long hint, int wantrsrc,
                  struct cat_desc *descp, struct cat_attr *attrp, struct cat_fork *forkp, cnid_t *desc_cnid);

static int cat_lookupmangled(struct hfsmount *hfsmp, struct cat_desc *descp, int wantrsrc,
                  struct cat_desc *outdescp, struct cat_attr *attrp, struct cat_fork *forkp);

extern int mac_roman_to_unicode(const Str31 hfs_str, UniChar *uni_str,
                                UInt32 maxCharLen, UInt32 *unicodeChars);

extern int unicode_to_hfs(ExtendedVCB *vcb, ByteCount srcLen,
                          const u_int16_t* srcStr, Str31 dstStr, int retry);


/* Internal catalog support routines */

static int cat_findposition(const CatalogKey *ckp, const CatalogRecord *crp,
                            struct position_state *state);

static int resolvelinkid(struct hfsmount *hfsmp, u_long linkref, ino_t *ino);

static int getkey(struct hfsmount *hfsmp, cnid_t cnid, CatalogKey * key);

static int buildkey(struct hfsmount *hfsmp, struct cat_desc *descp,
                        HFSPlusCatalogKey *key, int retry);

static void buildthreadkey(HFSCatalogNodeID parentID, int std_hfs, CatalogKey *key);

static void buildrecord(struct cat_attr *attrp, cnid_t cnid, int std_hfs, u_int32_t encoding, CatalogRecord *crp, int *recordSize);

static int catrec_update(const CatalogKey *ckp, CatalogRecord *crp, struct update_state *state);

static int builddesc(const HFSPlusCatalogKey *key, cnid_t cnid, u_long hint, u_long encoding,
                        int isdir, struct cat_desc *descp);

static void getbsdattr(struct hfsmount *hfsmp, const struct HFSPlusCatalogFile *crp, struct cat_attr * attrp);

static void promotekey(struct hfsmount *hfsmp, const HFSCatalogKey *hfskey, HFSPlusCatalogKey *keyp, u_long *encoding);
static void promotefork(struct hfsmount *hfsmp, const struct HFSCatalogFile *file, int resource, struct cat_fork * forkp);
static void promoteattr(struct hfsmount *hfsmp, const CatalogRecord *dataPtr, struct HFSPlusCatalogFile *crp);

static cnid_t getcnid(const CatalogRecord *crp);
static u_long getencoding(const CatalogRecord *crp);
static cnid_t getparentcnid(const CatalogRecord *recp);

static int isadir(const CatalogRecord *crp);

static int buildthread(void *keyp, void *recp, int std_hfs, int directory);


__private_extern__
int
cat_preflight(struct hfsmount *hfsmp, catops_t ops, cat_cookie_t *cookie, struct proc *p)
{
        FCB *fcb;
        int lockflags;
        int result;

        fcb = GetFileControlBlock(hfsmp->hfs_catalog_vp);

        lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);
         
        result = BTReserveSpace(fcb, ops, (void*)cookie);
        
        hfs_systemfile_unlock(hfsmp, lockflags);

        return MacToVFSError(result);
}

__private_extern__
void
cat_postflight(struct hfsmount *hfsmp, cat_cookie_t *cookie, struct proc *p)
{
        FCB *fcb;
        int lockflags;

        fcb = GetFileControlBlock(hfsmp->hfs_catalog_vp);

        lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);

        (void) BTReleaseReserve(fcb, (void*)cookie);

        hfs_systemfile_unlock(hfsmp, lockflags);
}

 
__private_extern__
void
cat_convertattr(
        struct hfsmount *hfsmp,
        CatalogRecord * recp,
        struct cat_attr *attrp,
        struct cat_fork *datafp,
        struct cat_fork *rsrcfp)
{
        int std_hfs = HFSTOVCB(hfsmp)->vcbSigWord == kHFSSigWord;

        if (std_hfs) {
                struct HFSPlusCatalogFile cnoderec;

                promoteattr(hfsmp, recp, &cnoderec);
                getbsdattr(hfsmp, &cnoderec, attrp);
        } else {
                getbsdattr(hfsmp, (struct HFSPlusCatalogFile *)recp, attrp);
        }

        if (isadir(recp))
                bzero(datafp, sizeof(*datafp));
        else if (std_hfs) {
                promotefork(hfsmp, (HFSCatalogFile *)&recp->hfsFile, 0, datafp);
                promotefork(hfsmp, (HFSCatalogFile *)&recp->hfsFile, 1, rsrcfp);
        } else {
                /* Convert the data fork. */
                datafp->cf_size = recp->hfsPlusFile.dataFork.logicalSize;
                datafp->cf_blocks = recp->hfsPlusFile.dataFork.totalBlocks;
                if ((hfsmp->hfc_stage == HFC_RECORDING) &&
                    (attrp->ca_atime >= hfsmp->hfc_timebase)) {
                        datafp->cf_bytesread =
                                recp->hfsPlusFile.dataFork.clumpSize *
                                HFSTOVCB(hfsmp)->blockSize;
                } else {
                        datafp->cf_bytesread = 0;
                }
                datafp->cf_vblocks = 0;
                bcopy(&recp->hfsPlusFile.dataFork.extents[0],
                      &datafp->cf_extents[0], sizeof(HFSPlusExtentRecord));

                /* Convert the resource fork. */
                rsrcfp->cf_size = recp->hfsPlusFile.resourceFork.logicalSize;
                rsrcfp->cf_blocks = recp->hfsPlusFile.resourceFork.totalBlocks;
                if ((hfsmp->hfc_stage == HFC_RECORDING) &&
                    (attrp->ca_atime >= hfsmp->hfc_timebase)) {
                        datafp->cf_bytesread =
                                recp->hfsPlusFile.resourceFork.clumpSize *
                                HFSTOVCB(hfsmp)->blockSize;
                } else {
                        datafp->cf_bytesread = 0;
                }
                rsrcfp->cf_vblocks = 0;
                bcopy(&recp->hfsPlusFile.resourceFork.extents[0],
                      &rsrcfp->cf_extents[0], sizeof(HFSPlusExtentRecord));
        }
}

__private_extern__
int
cat_convertkey(
        struct hfsmount *hfsmp,
        CatalogKey *key,
        CatalogRecord * recp,
        struct cat_desc *descp)
{
        int std_hfs = HFSTOVCB(hfsmp)->vcbSigWord == kHFSSigWord;
        HFSPlusCatalogKey * pluskey = NULL;
        u_long encoding;

        if (std_hfs) {
                MALLOC(pluskey, HFSPlusCatalogKey *, sizeof(HFSPlusCatalogKey), M_TEMP, M_WAITOK);
                promotekey(hfsmp, (HFSCatalogKey *)key, pluskey, &encoding);

        } else {
                pluskey = (HFSPlusCatalogKey *)key;
                encoding = getencoding(recp);
        }

        builddesc(pluskey, getcnid(recp), 0, encoding, isadir(recp), descp);
        if (std_hfs) {
                FREE(pluskey, M_TEMP);
        }
        return (0);
}


/*
 * cat_releasedesc
 */
__private_extern__
void
cat_releasedesc(struct cat_desc *descp)
{
        char * name;

        if (descp == NULL)
                return;

        if ((descp->cd_flags & CD_HASBUF) &&
            (descp->cd_nameptr != NULL)) {
                name = descp->cd_nameptr;
                descp->cd_nameptr = NULL;
                descp->cd_namelen = 0;
                descp->cd_flags &= ~CD_HASBUF;
                vfs_removename(name);
        }
        descp->cd_nameptr = NULL;
        descp->cd_namelen = 0;
}

/*
 * These Catalog functions allow access to the HFS Catalog (database).
 * The catalog b-tree lock must be aquired before calling any of these routines.
 */

/*
 * cat_lookup - lookup a catalog node using a cnode decriptor
 */
__private_extern__
int
cat_lookup(struct hfsmount *hfsmp, struct cat_desc *descp, int wantrsrc,
             struct cat_desc *outdescp, struct cat_attr *attrp,
             struct cat_fork *forkp, cnid_t *desc_cnid)
{
        CatalogKey * keyp;
        int std_hfs;
        int result;

        std_hfs = (HFSTOVCB(hfsmp)->vcbSigWord == kHFSSigWord);

        MALLOC(keyp, CatalogKey *, sizeof(CatalogKey), M_TEMP, M_WAITOK);

        result = buildkey(hfsmp, descp, (HFSPlusCatalogKey *)keyp, 1);
        if (result)
                goto exit;

        result = cat_lookupbykey(hfsmp, keyp, descp->cd_hint, wantrsrc, outdescp, attrp, forkp, desc_cnid);
        
        if (result == ENOENT) {
                if (!std_hfs) {
                        struct cat_desc temp_desc;
                        if (outdescp == NULL) {
                                bzero(&temp_desc, sizeof(temp_desc));
                                outdescp = &temp_desc;
                        }
                        result = cat_lookupmangled(hfsmp, descp, wantrsrc, outdescp, attrp, forkp);
                        if (desc_cnid) {
                            *desc_cnid = outdescp->cd_cnid;
                        }
                        if (outdescp == &temp_desc) {
                                /* Release the local copy of desc */
                                cat_releasedesc(outdescp);
                        }
                } else if (hfsmp->hfs_encoding != kTextEncodingMacRoman) {
                //      make MacRoman key from utf-8
                //      result = cat_lookupbykey(hfsmp, keyp, descp->cd_hint, attrp, forkp);
                //      update desc text encoding so that other catalog ops succeed
                }
        }
exit:   
        FREE(keyp, M_TEMP);

        return (result);
}

__private_extern__
int
cat_insertfilethread(struct hfsmount *hfsmp, struct cat_desc *descp)
{
        struct BTreeIterator *iterator;
        struct FSBufferDescriptor file_data;
        struct HFSCatalogFile file_rec;
        UInt16 datasize;
        FCB *fcb;
        int result;

        if (HFSTOVCB(hfsmp)->vcbSigWord != kHFSSigWord)
                return (EINVAL);

        fcb = GetFileControlBlock(HFSTOVCB(hfsmp)->catalogRefNum);

        MALLOC(iterator, BTreeIterator *, 2 * sizeof(*iterator), M_TEMP, M_WAITOK);
        bzero(&iterator[0], 2* sizeof(*iterator));
        result = buildkey(hfsmp, descp, (HFSPlusCatalogKey *)&iterator[0].key, 0);
        if (result)
                goto exit;

        BDINIT(file_data, &file_rec);
        result = BTSearchRecord(fcb, &iterator[0], &file_data, &datasize, &iterator[0]);
        if (result) 
                goto exit;

        if (file_rec.recordType != kHFSFileRecord) {
                result = EISDIR;
                goto exit;
        }

        if ((file_rec.flags & kHFSThreadExistsMask) == 0) {
                struct FSBufferDescriptor thread_data;
                struct HFSCatalogThread thread_rec;

                file_rec.flags |= kHFSThreadExistsMask;
                BDINIT(thread_data, &thread_rec);
                thread_data.itemSize = buildthread(&iterator[0].key, &thread_rec, 1, 0);
                buildthreadkey(file_rec.fileID, 1, (CatalogKey *)&iterator[1].key);
        
                result = BTInsertRecord(fcb, &iterator[1], &thread_data, thread_data.itemSize);
                if (result)
                        goto exit;
        
                (void) BTReplaceRecord(fcb, &iterator[0], &file_data, datasize);
                (void) BTFlushPath(fcb);
        }       
exit:
        (void) BTFlushPath(fcb);
        FREE(iterator, M_TEMP);

        return MacToVFSError(result);
}


/*
 * cat_findname - obtain a descriptor from cnid
 *
 * Only a thread lookup is performed.
 */
__private_extern__
int
cat_findname(struct hfsmount *hfsmp, cnid_t cnid, struct cat_desc *outdescp)
{
        struct BTreeIterator * iterator;
        FSBufferDescriptor btdata;
        CatalogKey * keyp;
        CatalogRecord * recp;
        int isdir;
        int result;
        int std_hfs;

        isdir = 0;
        std_hfs = (hfsmp->hfs_flags & HFS_STANDARD);

        MALLOC(iterator, BTreeIterator *, sizeof(*iterator), M_TEMP, M_WAITOK);
        buildthreadkey(cnid, std_hfs, (CatalogKey *)&iterator->key);
        iterator->hint.nodeNum = 0;

        MALLOC(recp, CatalogRecord *, sizeof(CatalogRecord), M_TEMP, M_WAITOK);
        BDINIT(btdata, recp);

        result = BTSearchRecord(VTOF(hfsmp->hfs_catalog_vp), iterator, &btdata, NULL, NULL);
        if (result)
                goto exit;

        /* Turn thread record into a cnode key (in place). */
        switch (recp->recordType) {
        case kHFSFolderThreadRecord:
                isdir = 1;
                /* fall through */
        case kHFSFileThreadRecord:
                keyp = (CatalogKey *)((char *)&recp->hfsThread.reserved + 6);
                keyp->hfs.keyLength = kHFSCatalogKeyMinimumLength + keyp->hfs.nodeName[0];
                break;

        case kHFSPlusFolderThreadRecord:
                isdir = 1;
                /* fall through */
        case kHFSPlusFileThreadRecord:
                keyp = (CatalogKey *)&recp->hfsPlusThread.reserved;
                keyp->hfsPlus.keyLength = kHFSPlusCatalogKeyMinimumLength +
                                          (keyp->hfsPlus.nodeName.length * 2);
                break;
        default:
                result = ENOENT;
                goto exit;
        }
        if (std_hfs) {
                HFSPlusCatalogKey * pluskey = NULL;
                u_long encoding;

                MALLOC(pluskey, HFSPlusCatalogKey *, sizeof(HFSPlusCatalogKey), M_TEMP, M_WAITOK);
                promotekey(hfsmp, &keyp->hfs, pluskey, &encoding);
                builddesc(pluskey, cnid, 0, encoding, isdir, outdescp);
                FREE(pluskey, M_TEMP);

        } else {
                builddesc((HFSPlusCatalogKey *)keyp, cnid, 0, 0, isdir, outdescp);
        }
exit:
        FREE(recp, M_TEMP);
        FREE(iterator, M_TEMP);

        return MacToVFSError(result);
}

/*
 * cat_idlookup - lookup a catalog node using a cnode id
 */
__private_extern__
int
cat_idlookup(struct hfsmount *hfsmp, cnid_t cnid, struct cat_desc *outdescp,
                 struct cat_attr *attrp, struct cat_fork *forkp)
{
        struct BTreeIterator * iterator;
        FSBufferDescriptor btdata;
        UInt16  datasize;
        CatalogKey * keyp;
        CatalogRecord * recp;
        int result;
        int std_hfs;

        std_hfs = (HFSTOVCB(hfsmp)->vcbSigWord == kHFSSigWord);

        MALLOC(iterator, BTreeIterator *, sizeof(*iterator), M_TEMP, M_WAITOK);
        bzero(iterator, sizeof(*iterator));
        buildthreadkey(cnid, std_hfs, (CatalogKey *)&iterator->key);

        MALLOC(recp, CatalogRecord *, sizeof(CatalogRecord), M_TEMP, M_WAITOK);
        BDINIT(btdata, recp);

        result = BTSearchRecord(VTOF(HFSTOVCB(hfsmp)->catalogRefNum), iterator,
                                &btdata, &datasize, iterator);
        if (result)
                goto exit;

        /* Turn thread record into a cnode key (in place) */
        switch (recp->recordType) {
        case kHFSFileThreadRecord:
        case kHFSFolderThreadRecord:
                keyp = (CatalogKey *)((char *)&recp->hfsThread.reserved + 6);
                keyp->hfs.keyLength = kHFSCatalogKeyMinimumLength + keyp->hfs.nodeName[0];
                break;

        case kHFSPlusFileThreadRecord:
        case kHFSPlusFolderThreadRecord:
                keyp = (CatalogKey *)&recp->hfsPlusThread.reserved;
                keyp->hfsPlus.keyLength = kHFSPlusCatalogKeyMinimumLength +
                                          (keyp->hfsPlus.nodeName.length * 2);
                break;

        default:
                result = ENOENT;
                goto exit;
        }

        result = cat_lookupbykey(hfsmp, keyp, 0, 0, outdescp, attrp, forkp, NULL);
        if (!result && outdescp) {
                cnid_t dcnid = outdescp->cd_cnid;
                /*
                 * Just for sanity's sake, let's make sure that
                 * the key in the thread matches the key in the record.
                 */
                if (cnid != dcnid) {
                        printf("Requested cnid (%d / 0x%08lx) != dcnid (%d / 0x%08lx)\n", cnid, cnid, dcnid, dcnid);
                        result = ENOENT;
                }
        }

exit:
        FREE(recp, M_TEMP);
        FREE(iterator, M_TEMP);

        return MacToVFSError(result);
}


/*
 * cat_lookupmangled - lookup a catalog node using a mangled name
 */
static int
cat_lookupmangled(struct hfsmount *hfsmp, struct cat_desc *descp, int wantrsrc,
                  struct cat_desc *outdescp, struct cat_attr *attrp, struct cat_fork *forkp)
{
        cnid_t fileID;
        int prefixlen;
        int result;
        
        if (wantrsrc)
                return (ENOENT);

        fileID = GetEmbeddedFileID(descp->cd_nameptr, descp->cd_namelen, &prefixlen);
        if (fileID < kHFSFirstUserCatalogNodeID)
                return (ENOENT);

        result = cat_idlookup(hfsmp, fileID, outdescp, attrp, forkp);
        if (result)
                return (ENOENT);

        /* It must be in the correct directory */
        if (descp->cd_parentcnid != outdescp->cd_parentcnid)
                goto falsematch;

        if ((outdescp->cd_namelen < prefixlen) ||
            bcmp(outdescp->cd_nameptr, descp->cd_nameptr, prefixlen-6) != 0)
                goto falsematch;

        return (0);

falsematch:
        cat_releasedesc(outdescp);
        return (ENOENT);
}


/*
 * cat_lookupbykey - lookup a catalog node using a cnode key
 */
static int
cat_lookupbykey(struct hfsmount *hfsmp, CatalogKey *keyp, u_long hint, int wantrsrc,
                  struct cat_desc *descp, struct cat_attr *attrp, struct cat_fork *forkp, cnid_t *desc_cnid)
{
        struct BTreeIterator * iterator;
        FSBufferDescriptor btdata;
        CatalogRecord * recp;
        UInt16  datasize;
        int result;
        int std_hfs;
        u_long ilink = 0;
        cnid_t cnid = 0;
        u_long encoding = 0;

        std_hfs = (HFSTOVCB(hfsmp)->vcbSigWord == kHFSSigWord);

        MALLOC(recp, CatalogRecord *, sizeof(CatalogRecord), M_TEMP, M_WAITOK);
        BDINIT(btdata, recp);
        MALLOC(iterator, BTreeIterator *, sizeof(*iterator), M_TEMP, M_WAITOK);
        bzero(iterator, sizeof(*iterator));
        iterator->hint.nodeNum = hint;
        bcopy(keyp, &iterator->key, sizeof(CatalogKey));

        result = BTSearchRecord(VTOF(HFSTOVCB(hfsmp)->catalogRefNum), iterator,
                                &btdata, &datasize, iterator);
        if (result) 
                goto exit;

        /* Save the cnid now in case there's a hard link */
        cnid = getcnid(recp);
        encoding = getencoding(recp);
        hint = iterator->hint.nodeNum;

        /* Hide the journal files (if any) */
        if ((hfsmp->jnl || ((HFSTOVCB(hfsmp)->vcbAtrb & kHFSVolumeJournaledMask) && (hfsmp->hfs_flags & HFS_READ_ONLY))) &&
                ((cnid == hfsmp->hfs_jnlfileid) ||
                 (cnid == hfsmp->hfs_jnlinfoblkid))) {

                result = ENOENT;
                goto exit;
        }

        /*
         * When a hardlink link is encountered, auto resolve it
         */
        if (!std_hfs
            && (attrp || forkp) 
            && (recp->recordType == kHFSPlusFileRecord)
            && (SWAP_BE32(recp->hfsPlusFile.userInfo.fdType) == kHardLinkFileType)
            && (SWAP_BE32(recp->hfsPlusFile.userInfo.fdCreator) == kHFSPlusCreator)
            && ((to_bsd_time(recp->hfsPlusFile.createDate) == (time_t)HFSTOVCB(hfsmp)->vcbCrDate) ||
                (to_bsd_time(recp->hfsPlusFile.createDate) == (time_t)hfsmp->hfs_metadata_createdate))) {

                ilink = recp->hfsPlusFile.bsdInfo.special.iNodeNum;

                (void) resolvelink(hfsmp, ilink, (struct HFSPlusCatalogFile *)recp);
        }

        if (attrp != NULL) {
                if (std_hfs) {
                        struct HFSPlusCatalogFile cnoderec;

                        promoteattr(hfsmp, recp, &cnoderec);
                        getbsdattr(hfsmp, &cnoderec, attrp);
                } else {
                        getbsdattr(hfsmp, (struct HFSPlusCatalogFile *)recp, attrp);
                        if (ilink)
                                attrp->ca_rdev = ilink;
                }
        }
        if (forkp != NULL) {
                if (isadir(recp)) {
                        bzero(forkp, sizeof(*forkp));
                } else if (std_hfs) {
                        promotefork(hfsmp, (HFSCatalogFile *)&recp->hfsFile, wantrsrc, forkp);
                } else if (wantrsrc) {
                        /* Convert the resource fork. */
                        forkp->cf_size = recp->hfsPlusFile.resourceFork.logicalSize;
                        forkp->cf_blocks = recp->hfsPlusFile.resourceFork.totalBlocks;
                        if ((hfsmp->hfc_stage == HFC_RECORDING) &&
                            (to_bsd_time(recp->hfsPlusFile.accessDate) >= hfsmp->hfc_timebase)) {
                                forkp->cf_bytesread =
                                        recp->hfsPlusFile.resourceFork.clumpSize *
                                        HFSTOVCB(hfsmp)->blockSize;
                        } else {
                                forkp->cf_bytesread = 0;
                        }
                        forkp->cf_vblocks = 0;
                        bcopy(&recp->hfsPlusFile.resourceFork.extents[0],
                              &forkp->cf_extents[0], sizeof(HFSPlusExtentRecord));
                } else {
                        int i;
                        u_int32_t validblks;

                        /* Convert the data fork. */
                        forkp->cf_size = recp->hfsPlusFile.dataFork.logicalSize;
                        forkp->cf_blocks = recp->hfsPlusFile.dataFork.totalBlocks;
                        if ((hfsmp->hfc_stage == HFC_RECORDING) &&
                            (to_bsd_time(recp->hfsPlusFile.accessDate) >= hfsmp->hfc_timebase)) {
                                forkp->cf_bytesread =
                                        recp->hfsPlusFile.dataFork.clumpSize *
                                        HFSTOVCB(hfsmp)->blockSize;
                        } else {
                                forkp->cf_bytesread = 0;
                        }
                        forkp->cf_vblocks = 0;
                        bcopy(&recp->hfsPlusFile.dataFork.extents[0],
                              &forkp->cf_extents[0], sizeof(HFSPlusExtentRecord));

                        /* Validate the fork's resident extents. */
                        validblks = 0;
                        for (i = 0; i < kHFSPlusExtentDensity; ++i) {
                                if (forkp->cf_extents[i].startBlock + forkp->cf_extents[i].blockCount >= hfsmp->totalBlocks) {
                                        /* Suppress any bad extents so a remove can succeed. */
                                        forkp->cf_extents[i].startBlock = 0;
                                        forkp->cf_extents[i].blockCount = 0;
                                        /* Disable writes */
                                        if (attrp != NULL) {
                                                attrp->ca_mode &= S_IFMT | S_IRUSR | S_IRGRP | S_IROTH;
                                        }
                                } else {
                                        validblks += forkp->cf_extents[i].blockCount;
                                }
                        }
                        /* Adjust for any missing blocks. */
                        if ((validblks < forkp->cf_blocks) && (forkp->cf_extents[7].blockCount == 0)) {
                                u_int64_t psize;

                                forkp->cf_blocks = validblks;
                                if (attrp != NULL) {
                                        attrp->ca_blocks = validblks + recp->hfsPlusFile.resourceFork.totalBlocks;
                                }
                                psize = (u_int64_t)validblks * (u_int64_t)hfsmp->blockSize;
                                if (psize < forkp->cf_size) {
                                        forkp->cf_size = psize;
                                }

                        }
                }
        }
        if (descp != NULL) {
                HFSPlusCatalogKey * pluskey = NULL;

                if (std_hfs) {
                        MALLOC(pluskey, HFSPlusCatalogKey *, sizeof(HFSPlusCatalogKey), M_TEMP, M_WAITOK);
                        promotekey(hfsmp, (HFSCatalogKey *)&iterator->key, pluskey, &encoding);
        
                } else
                        pluskey = (HFSPlusCatalogKey *)&iterator->key;

                builddesc(pluskey, cnid, hint, encoding, isadir(recp), descp);
                if (std_hfs) {
                        FREE(pluskey, M_TEMP);
                }
        }

        if (desc_cnid != NULL) {
            *desc_cnid = cnid;
        }
exit:
        FREE(iterator, M_TEMP);
        FREE(recp, M_TEMP);

        return MacToVFSError(result);
}


/*
 * cat_create - create a node in the catalog
 */
__private_extern__
int
cat_create(struct hfsmount *hfsmp, struct cat_desc *descp, struct cat_attr *attrp,
        struct cat_desc *out_descp)
{
        ExtendedVCB * vcb;
        FCB * fcb;
        struct btobj * bto;
        FSBufferDescriptor btdata;
        u_int32_t nextCNID;
        u_int32_t datalen;
        int std_hfs;
        int result = 0;
        u_long encoding;
        int modeformat;
        int mntlock = 0;

        modeformat = attrp->ca_mode & S_IFMT;

        vcb = HFSTOVCB(hfsmp);
        fcb = GetFileControlBlock(vcb->catalogRefNum);
        std_hfs = (vcb->vcbSigWord == kHFSSigWord);

        /*
         * Atomically get the next CNID.  If we have wrapped the CNIDs
         * then keep the hfsmp lock held until we have found a CNID.
         */
        HFS_MOUNT_LOCK(hfsmp, TRUE);
        mntlock = 1;
        nextCNID = hfsmp->vcbNxtCNID;
        if (nextCNID == 0xFFFFFFFF) {
                if (std_hfs) {
                        result = ENOSPC;
                } else {
                        hfsmp->vcbNxtCNID = kHFSFirstUserCatalogNodeID;
                        hfsmp->vcbAtrb |= kHFSCatalogNodeIDsReusedMask;
                }
        } else {
                hfsmp->vcbNxtCNID++;
        }
        hfsmp->vcbFlags |= 0xFF00;
        /* OK to drop lock if CNIDs are not wrapping */
        if ((hfsmp->vcbAtrb & kHFSCatalogNodeIDsReusedMask) == 0) {
                HFS_MOUNT_UNLOCK(hfsmp, TRUE);
                mntlock = 0;
                if (result)
                        return (result);  /* HFS only exit */
        }

        /* Get space for iterator, key and data */      
        MALLOC(bto, struct btobj *, sizeof(struct btobj), M_TEMP, M_WAITOK);
        bto->iterator.hint.nodeNum = 0;

        result = buildkey(hfsmp, descp, &bto->key, 0);
        if (result)
                goto exit;

        if (!std_hfs) {
                encoding = hfs_pickencoding(bto->key.nodeName.unicode,
                        bto->key.nodeName.length);
                hfs_setencodingbits(hfsmp, encoding);
        }

        /*
         * Insert the thread record first
         */
        if (!std_hfs || (modeformat == S_IFDIR)) {
                datalen = buildthread((void*)&bto->key, &bto->data, std_hfs,
                                S_ISDIR(attrp->ca_mode));
                btdata.bufferAddress = &bto->data;
                btdata.itemSize = datalen;
                btdata.itemCount = 1;
                
                for (;;) {
                        buildthreadkey(nextCNID, std_hfs, (CatalogKey *) &bto->iterator.key);

                        result = BTInsertRecord(fcb, &bto->iterator, &btdata, datalen);
                        if ((result == btExists) && !std_hfs && mntlock) {
                                /*
                                 * Allow CNIDs on HFS Plus volumes to wrap around
                                 */
                                if (++nextCNID < kHFSFirstUserCatalogNodeID) {
                                        nextCNID = kHFSFirstUserCatalogNodeID;
                                }
                                continue;
                        }
                        break;
                }
                if (result) goto exit;
        }
        
        /*
         * CNID is now established. If we have wrapped then
         * update the vcbNxtCNID and drop the vcb lock.
         */
        if (mntlock) {
                hfsmp->vcbNxtCNID = nextCNID + 1;
                if (hfsmp->vcbNxtCNID < kHFSFirstUserCatalogNodeID) {
                        hfsmp->vcbNxtCNID = kHFSFirstUserCatalogNodeID;
                }
                HFS_MOUNT_UNLOCK(hfsmp, TRUE);
                mntlock = 0;
        }

        /*
         * Now insert the file/directory record
         */
        buildrecord(attrp, nextCNID, std_hfs, encoding, &bto->data, &datalen);
        btdata.bufferAddress = &bto->data;
        btdata.itemSize = datalen;
        btdata.itemCount = 1;
        
        bcopy(&bto->key, &bto->iterator.key, sizeof(bto->key));

        result = BTInsertRecord(fcb, &bto->iterator, &btdata, datalen);
        if (result) {
                if (result == btExists)
                        result = EEXIST;

                /* Back out the thread record */
                if (!std_hfs || S_ISDIR(attrp->ca_mode)) {
                        buildthreadkey(nextCNID, std_hfs, (CatalogKey *)&bto->iterator.key);
                        (void) BTDeleteRecord(fcb, &bto->iterator);
                }
                goto exit;
        }

        /*
         * Insert was Successfull, update name, parent and volume
         */


        if (out_descp != NULL) {
                HFSPlusCatalogKey * pluskey = NULL;

                if (std_hfs) {
                        MALLOC(pluskey, HFSPlusCatalogKey *, sizeof(HFSPlusCatalogKey), M_TEMP, M_WAITOK);
                        promotekey(hfsmp, (HFSCatalogKey *)&bto->iterator.key, pluskey, &encoding);
        
                } else
                        pluskey = (HFSPlusCatalogKey *)&bto->iterator.key;

                builddesc(pluskey, nextCNID, bto->iterator.hint.nodeNum,
                        encoding, S_ISDIR(attrp->ca_mode), out_descp);
                if (std_hfs) {
                        FREE(pluskey, M_TEMP);
                }
        }
        attrp->ca_fileid = nextCNID;

exit:
        if (mntlock)
                HFS_MOUNT_UNLOCK(hfsmp, TRUE);

        (void) BTFlushPath(fcb);
        FREE(bto, M_TEMP);

        return MacToVFSError(result);
}


/*
 * cnode_rename - rename a catalog node
 *
 * Assumes that the target's directory exists.
 *
 * Order of B-tree operations:
 *      1. BTSearchRecord(from_cnode, &data);
 *      2. BTInsertRecord(to_cnode, &data);
 *      3. BTDeleteRecord(from_cnode);
 *      4. BTDeleteRecord(from_thread);
 *      5. BTInsertRecord(to_thread);
 */
__private_extern__
int 
cat_rename (
        struct hfsmount * hfsmp,
        struct cat_desc * from_cdp,
        struct cat_desc * todir_cdp,
        struct cat_desc * to_cdp,
        struct cat_desc * out_cdp )
{
        struct BTreeIterator * to_iterator = NULL;
        struct BTreeIterator * from_iterator = NULL;
        FSBufferDescriptor btdata;
        CatalogRecord * recp = NULL;
        HFSPlusCatalogKey * to_key;
        ExtendedVCB * vcb;
        FCB * fcb;
        UInt16  datasize;
        int result = 0;
        int sourcegone = 0;
        int skipthread = 0;
        int directory = from_cdp->cd_flags & CD_ISDIR;
        int std_hfs;
        u_long encoding = 0;

        vcb = HFSTOVCB(hfsmp);
        fcb = GetFileControlBlock(vcb->catalogRefNum);
        std_hfs = (vcb->vcbSigWord == kHFSSigWord);

        if (from_cdp->cd_namelen == 0 || to_cdp->cd_namelen == 0)
                return (EINVAL);

        MALLOC(from_iterator, BTreeIterator *, sizeof(*from_iterator), M_TEMP, M_WAITOK);
        bzero(from_iterator, sizeof(*from_iterator));
        if ((result = buildkey(hfsmp, from_cdp, (HFSPlusCatalogKey *)&from_iterator->key, 0)))
                goto exit;      

        MALLOC(to_iterator, BTreeIterator *, sizeof(*to_iterator), M_TEMP, M_WAITOK);
        bzero(to_iterator, sizeof(*to_iterator));
        if ((result = buildkey(hfsmp, to_cdp, (HFSPlusCatalogKey *)&to_iterator->key, 0)))
                goto exit;      

        to_key = (HFSPlusCatalogKey *)&to_iterator->key;
        MALLOC(recp, CatalogRecord *, sizeof(CatalogRecord), M_TEMP, M_WAITOK);
        BDINIT(btdata, recp);

        /*
         * When moving a directory, make sure its a valid move.
         */
        if (directory && (from_cdp->cd_parentcnid != to_cdp->cd_parentcnid)) {
                struct BTreeIterator iterator;
                cnid_t cnid = from_cdp->cd_cnid;
                cnid_t pathcnid = todir_cdp->cd_parentcnid;

                /* First check the obvious ones */
                if (cnid == fsRtDirID  ||
                    cnid == to_cdp->cd_parentcnid  ||
                    cnid == pathcnid) {
                        result = EINVAL;
                        goto exit;
                }
                bzero(&iterator, sizeof(iterator));
                /*
                 * Traverese destination path all the way back to the root
                 * making sure that source directory is not encountered.
                 *
                 */
                while (pathcnid > fsRtDirID) {
                        buildthreadkey(pathcnid, std_hfs,
                                        (CatalogKey *)&iterator.key);
                        result = BTSearchRecord(fcb, &iterator, &btdata,
                                        &datasize, NULL);
                        if (result) goto exit;
                        
                        pathcnid = getparentcnid(recp);
                        if (pathcnid == cnid) {
                                result = EINVAL;
                                goto exit;
                        }
                }
        }

        /*
         * Step 1: Find cnode data at old location
         */
        result = BTSearchRecord(fcb, from_iterator, &btdata,
                                &datasize, from_iterator);
        if (result) {
                if (std_hfs || (result != btNotFound)) 
                        goto exit;
        
                struct cat_desc temp_desc;

                /* Probably the node has mangled name */
                result = cat_lookupmangled(hfsmp, from_cdp, 0, &temp_desc, NULL, NULL); 
                if (result) 
                        goto exit;
                        
                /* The file has mangled name.  Search the cnode data using full name */
                bzero(from_iterator, sizeof(*from_iterator));
                result = buildkey(hfsmp, &temp_desc, (HFSPlusCatalogKey *)&from_iterator->key, 0);
                if (result) {
                        cat_releasedesc(&temp_desc);
                        goto exit;
                }

                result = BTSearchRecord(fcb, from_iterator, &btdata, &datasize, from_iterator);
                if (result) {
                        cat_releasedesc(&temp_desc);
                        goto exit;
                }
                
                cat_releasedesc(&temp_desc);
        }

        /* Update the text encoding (on disk and in descriptor) */
        if (!std_hfs) {
                encoding = hfs_pickencoding(to_key->nodeName.unicode,
                                to_key->nodeName.length);
                hfs_setencodingbits(hfsmp, encoding);
                recp->hfsPlusFile.textEncoding = encoding;
                if (out_cdp)
                        out_cdp->cd_encoding = encoding;
        }
        
        if (std_hfs && !directory &&
            !(recp->hfsFile.flags & kHFSThreadExistsMask))
                skipthread = 1;
#if 0
        /*
         * If the keys are identical then there's nothing left to do!
         *
         * update the hint and exit
         *
         */
        if (std_hfs && hfskeycompare(to_key, iter->key) == 0)
                goto exit;      
        if (!std_hfs && hfspluskeycompare(to_key, iter->key) == 0)
                goto exit;      
#endif

        /* Step 2: Insert cnode at new location */
        result = BTInsertRecord(fcb, to_iterator, &btdata, datasize);
        if (result == btExists) {
                int fromtype = recp->recordType;

                if (from_cdp->cd_parentcnid != to_cdp->cd_parentcnid)
                        goto exit; /* EEXIST */

                /* Find cnode data at new location */
                result = BTSearchRecord(fcb, to_iterator, &btdata, &datasize, NULL);
                if (result)
                        goto exit;
                
                if ((fromtype != recp->recordType) ||
                    (from_cdp->cd_cnid != getcnid(recp))) {
                        result = EEXIST;
                        goto exit; /* EEXIST */
                }
                /* The old name is a case variant and must be removed */
                result = BTDeleteRecord(fcb, from_iterator);
                if (result)
                        goto exit;

                /* Insert cnode (now that case duplicate is gone) */
                result = BTInsertRecord(fcb, to_iterator, &btdata, datasize);
                if (result) {
                        /* Try and restore original before leaving */
                    // XXXdbg
                    #if 1
                       {
                        int err;
                        err = BTInsertRecord(fcb, from_iterator, &btdata, datasize);
                        if (err)
                                panic("cat_create: could not undo (BTInsert = %d)", err);
                       }
                    #else
                        (void) BTInsertRecord(fcb, from_iterator, &btdata, datasize);
                    #endif
                        goto exit;
                }
                sourcegone = 1;
        }
        if (result)
                goto exit;

        /* Step 3: Remove cnode from old location */
        if (!sourcegone) {
                result = BTDeleteRecord(fcb, from_iterator);
                if (result) {
                        /* Try and delete new record before leaving */
                  // XXXdbg
                  #if 1
                     {
                        int err;
                        err = BTDeleteRecord(fcb, to_iterator);
                        if (err)
                                panic("cat_create: could not undo (BTDelete = %d)", err);
                     }                  
                  #else
                        (void) BTDeleteRecord(fcb, to_iterator);
                  #endif
                        goto exit;
                }
        }

        /* #### POINT OF NO RETURN #### */

        /*
         * Step 4: Remove cnode's old thread record
         */
        buildthreadkey(from_cdp->cd_cnid, std_hfs, (CatalogKey *)&from_iterator->key);
        (void) BTDeleteRecord(fcb, from_iterator);

        /*
         * Step 5: Insert cnode's new thread record
         * (optional for HFS files)
         */
        if (!skipthread) {
                datasize = buildthread(&to_iterator->key, recp, std_hfs, directory);
                btdata.itemSize = datasize;
                buildthreadkey(from_cdp->cd_cnid, std_hfs, (CatalogKey *)&from_iterator->key);
                result = BTInsertRecord(fcb, from_iterator, &btdata, datasize);
        }

        if (out_cdp) {
                HFSPlusCatalogKey * pluskey = NULL;

                if (std_hfs) {
                        MALLOC(pluskey, HFSPlusCatalogKey *, sizeof(HFSPlusCatalogKey), M_TEMP, M_WAITOK);
                        promotekey(hfsmp, (HFSCatalogKey *)&to_iterator->key, pluskey, &encoding);

                        /* Save the real encoding hint in the Finder Info (field 4). */
                        if (directory && from_cdp->cd_cnid == kHFSRootFolderID) {
                                u_long realhint;

                                realhint = hfs_pickencoding(pluskey->nodeName.unicode, pluskey->nodeName.length);
                                vcb->vcbFndrInfo[4] = SET_HFS_TEXT_ENCODING(realhint);
                        }
        
                } else
                        pluskey = (HFSPlusCatalogKey *)&to_iterator->key;

                builddesc(pluskey, from_cdp->cd_cnid, to_iterator->hint.nodeNum,
                        encoding, directory, out_cdp);
                if (std_hfs) {
                        FREE(pluskey, M_TEMP);
                }
        }
exit:
        (void) BTFlushPath(fcb);
        if (from_iterator)
                FREE(from_iterator, M_TEMP);
        if (to_iterator)
                FREE(to_iterator, M_TEMP);
        if (recp)
                FREE(recp, M_TEMP);
        return MacToVFSError(result);
}


/*
 * cat_delete - delete a node from the catalog
 *
 * Order of B-tree operations:
 *      1. BTDeleteRecord(cnode);
 *      2. BTDeleteRecord(thread);
 *      3. BTUpdateRecord(parent);
 */
__private_extern__
int
cat_delete(struct hfsmount *hfsmp, struct cat_desc *descp, struct cat_attr *attrp)
{
        ExtendedVCB * vcb;
        FCB * fcb;
        BTreeIterator *iterator;
        cnid_t cnid;
        int std_hfs;
        int result;

        vcb = HFSTOVCB(hfsmp);
        fcb = GetFileControlBlock(vcb->catalogRefNum);
        std_hfs = (vcb->vcbSigWord == kHFSSigWord);

        /* Preflight check:
         *
         * The root directory cannot be deleted
         * A directory must be empty
         * A file must be zero length (no blocks)
         */
        if (descp->cd_cnid < kHFSFirstUserCatalogNodeID ||
            descp->cd_parentcnid == kHFSRootParentID)
                return (EINVAL);

        /* XXX Preflight Missing */
        
        /* Get space for iterator */    
        MALLOC(iterator, BTreeIterator *, sizeof(*iterator), M_TEMP, M_WAITOK);
        iterator->hint.nodeNum = 0;

        /*
         * Derive a key from either the file ID (for a virtual inode)
         * or the descriptor.
         */
        if (descp->cd_namelen == 0) {
            result = getkey(hfsmp, attrp->ca_fileid, (CatalogKey *)&iterator->key);
            cnid = attrp->ca_fileid;
        } else {
                result = buildkey(hfsmp, descp, (HFSPlusCatalogKey *)&iterator->key, 0);
                cnid = descp->cd_cnid;
        }
        if (result)
                goto exit;

        /* Delete record */
        result = BTDeleteRecord(fcb, iterator);
        if (result) {
                if (std_hfs || (result != btNotFound))
                        goto exit;

                struct cat_desc temp_desc;
                
                /* Probably the node has mangled name */
                result = cat_lookupmangled(hfsmp, descp, 0, &temp_desc, attrp, NULL); 
                if (result) 
                        goto exit;
                
                /* The file has mangled name.  Delete the file using full name  */
                bzero(iterator, sizeof(*iterator));
                result = buildkey(hfsmp, &temp_desc, (HFSPlusCatalogKey *)&iterator->key, 0);
                cnid = temp_desc.cd_cnid;
                if (result) {
                        cat_releasedesc(&temp_desc);
                        goto exit;
                }

                result = BTDeleteRecord(fcb, iterator);
                if (result) { 
                        cat_releasedesc(&temp_desc);
                        goto exit;
                }

                cat_releasedesc(&temp_desc);
        }

        /* Delete thread record, ignore errors */
        buildthreadkey(cnid, std_hfs, (CatalogKey *)&iterator->key);
        (void) BTDeleteRecord(fcb, iterator);

exit:
        (void) BTFlushPath(fcb);
        FREE(iterator, M_TEMP);

        return MacToVFSError(result);
}


/*
 * cnode_update - update the catalog node described by descp
 * using the data from attrp and forkp.
 */
__private_extern__
int
cat_update(struct hfsmount *hfsmp, struct cat_desc *descp, struct cat_attr *attrp,
        struct cat_fork *dataforkp, struct cat_fork *rsrcforkp)
{
        ExtendedVCB * vcb;
        FCB * fcb;
        BTreeIterator * iterator;
        struct update_state state;
        int std_hfs;
        int result;

        vcb = HFSTOVCB(hfsmp);
        fcb = GetFileControlBlock(vcb->catalogRefNum);
        std_hfs = (vcb->vcbSigWord == kHFSSigWord);

        state.s_desc = descp;
        state.s_attr = attrp;
        state.s_datafork = dataforkp;
        state.s_rsrcfork = rsrcforkp;
        state.s_hfsmp = hfsmp;

        /* Get space for iterator */    
        MALLOC(iterator, BTreeIterator *, sizeof(*iterator), M_TEMP, M_WAITOK);

        /*
         * For open-deleted files we need to do a lookup by cnid
         * (using thread rec).
         *
         * For hard links, the target of the update is the inode
         * itself (not the link record) so a lookup by fileid
         * (i.e. thread rec) is needed.
         */
        if ((descp->cd_cnid != attrp->ca_fileid) || (descp->cd_namelen == 0))
                result = getkey(hfsmp, attrp->ca_fileid, (CatalogKey *)&iterator->key);
        else
                result = buildkey(hfsmp, descp, (HFSPlusCatalogKey *)&iterator->key, 0);
        if (result)
                goto exit;

        /* Pass a node hint */
        iterator->hint.nodeNum = descp->cd_hint;

        result = BTUpdateRecord(fcb, iterator,
                                (IterateCallBackProcPtr)catrec_update, &state);
        if (result)
                goto exit;

        /* Update the node hint. */
        descp->cd_hint = iterator->hint.nodeNum;

exit:
        (void) BTFlushPath(fcb);
        FREE(iterator, M_TEMP);

        return MacToVFSError(result);
}

/*
 * catrec_update - Update the fields of a catalog record
 * This is called from within BTUpdateRecord.
 */
static int
catrec_update(const CatalogKey *ckp, CatalogRecord *crp, struct update_state *state)
{
        struct cat_desc *descp;
        struct cat_attr *attrp;
        struct cat_fork *forkp;
        struct hfsmount *hfsmp;
        long blksize;
        int i;

        descp   = state->s_desc;
        attrp   = state->s_attr;
        hfsmp   = state->s_hfsmp;
        blksize = HFSTOVCB(hfsmp)->blockSize;

        switch (crp->recordType) {
        case kHFSFolderRecord: {
                HFSCatalogFolder *dir;
                
                dir = (struct HFSCatalogFolder *)crp;
                /* Do a quick sanity check */
                if ((ckp->hfs.parentID != descp->cd_parentcnid) ||
                    (dir->folderID != descp->cd_cnid))
                        return (btNotFound);
                dir->valence    = attrp->ca_entries;
                dir->createDate = UTCToLocal(to_hfs_time(attrp->ca_itime));
                dir->modifyDate = UTCToLocal(to_hfs_time(attrp->ca_mtime));
                dir->backupDate = UTCToLocal(to_hfs_time(attrp->ca_btime));
                bcopy(&attrp->ca_finderinfo[0], &dir->userInfo, 16);
                bcopy(&attrp->ca_finderinfo[16], &dir->finderInfo, 16);
                break;
        }
        case kHFSFileRecord: {
                HFSCatalogFile *file;
                
                file = (struct HFSCatalogFile *)crp;
                /* Do a quick sanity check */
                if ((ckp->hfs.parentID != descp->cd_parentcnid) ||
                    (file->fileID != attrp->ca_fileid))
                        return (btNotFound);
                file->createDate = UTCToLocal(to_hfs_time(attrp->ca_itime));
                file->modifyDate = UTCToLocal(to_hfs_time(attrp->ca_mtime));
                file->backupDate = UTCToLocal(to_hfs_time(attrp->ca_btime));
                bcopy(&attrp->ca_finderinfo[0], &file->userInfo, 16);
                bcopy(&attrp->ca_finderinfo[16], &file->finderInfo, 16);
                if (state->s_rsrcfork) {
                        forkp = state->s_rsrcfork;
                        file->rsrcLogicalSize  = forkp->cf_size;
                        file->rsrcPhysicalSize = forkp->cf_blocks * blksize;
                        for (i = 0; i < kHFSExtentDensity; ++i) {
                                file->rsrcExtents[i].startBlock =
                                        (u_int16_t)forkp->cf_extents[i].startBlock;
                                file->rsrcExtents[i].blockCount =
                                        (u_int16_t)forkp->cf_extents[i].blockCount;
                        }
                }
                if (state->s_datafork) {
                        forkp = state->s_datafork;
                        file->dataLogicalSize  = forkp->cf_size;
                        file->dataPhysicalSize = forkp->cf_blocks * blksize;
                        for (i = 0; i < kHFSExtentDensity; ++i) {
                                file->dataExtents[i].startBlock =
                                        (u_int16_t)forkp->cf_extents[i].startBlock;
                                file->dataExtents[i].blockCount =
                                        (u_int16_t)forkp->cf_extents[i].blockCount;
                        }
                }
                break;
        }
        case kHFSPlusFolderRecord: {
                HFSPlusCatalogFolder *dir;
                
                dir = (struct HFSPlusCatalogFolder *)crp;
                /* Do a quick sanity check */
                if ((ckp->hfsPlus.parentID != descp->cd_parentcnid) ||
                        (dir->folderID != descp->cd_cnid)) 
                        return (btNotFound);
                dir->flags            = attrp->ca_recflags;
                dir->valence          = attrp->ca_entries;
                dir->createDate       = to_hfs_time(attrp->ca_itime);
                dir->contentModDate   = to_hfs_time(attrp->ca_mtime);
                dir->backupDate       = to_hfs_time(attrp->ca_btime);
                dir->accessDate       = to_hfs_time(attrp->ca_atime);
                attrp->ca_atimeondisk = attrp->ca_atime;        
                dir->attributeModDate = to_hfs_time(attrp->ca_ctime);
                dir->textEncoding     = descp->cd_encoding;
                dir->attrBlocks       = attrp->ca_attrblks;
                bcopy(&attrp->ca_finderinfo[0], &dir->userInfo, 32);
                /*
                 * Update the BSD Info if it was already initialized on
                 * disk or if the runtime values have been modified.
                 *
                 * If the BSD info was already initialized, but
                 * MNT_UNKNOWNPERMISSIONS is set, then the runtime IDs are
                 * probably different than what was on disk.  We don't want
                 * to overwrite the on-disk values (so if we turn off
                 * MNT_UNKNOWNPERMISSIONS, the old IDs get used again).
                 * This way, we can still change fields like the mode or
                 * dates even when MNT_UNKNOWNPERMISSIONS is set.
                 *
                 * Note that if MNT_UNKNOWNPERMISSIONS is set, hfs_chown
                 * won't change the uid or gid from their defaults.  So, if
                 * the BSD info wasn't set, and the runtime values are not
                 * default, then what changed was the mode or flags.  We
                 * have to set the uid and gid to something, so use the
                 * supplied values (which will be default), which has the
                 * same effect as creating a new file while
                 * MNT_UNKNOWNPERMISSIONS is set.
                 */
                if ((dir->bsdInfo.fileMode != 0) ||
                    (attrp->ca_flags != 0) ||
                    (attrp->ca_uid != hfsmp->hfs_uid) ||
                    (attrp->ca_gid != hfsmp->hfs_gid) ||
                    ((attrp->ca_mode & ALLPERMS) !=
                     (hfsmp->hfs_dir_mask & ACCESSPERMS))) {
                        if ((dir->bsdInfo.fileMode == 0) ||
                            (((unsigned int)vfs_flags(HFSTOVFS(hfsmp))) & MNT_UNKNOWNPERMISSIONS) == 0) {
                                dir->bsdInfo.ownerID = attrp->ca_uid;
                                dir->bsdInfo.groupID = attrp->ca_gid;
                        }
                        dir->bsdInfo.ownerFlags = attrp->ca_flags & 0x000000FF;
                        dir->bsdInfo.adminFlags = attrp->ca_flags >> 16;
                        dir->bsdInfo.fileMode   = attrp->ca_mode;
                }
                break;
        }
        case kHFSPlusFileRecord: {
                HFSPlusCatalogFile *file;
                
                file = (struct HFSPlusCatalogFile *)crp;
                /* Do a quick sanity check */
                if (file->fileID != attrp->ca_fileid)
                        return (btNotFound);
                file->flags            = attrp->ca_recflags;
                file->createDate       = to_hfs_time(attrp->ca_itime);
                file->contentModDate   = to_hfs_time(attrp->ca_mtime);
                file->backupDate       = to_hfs_time(attrp->ca_btime);
                file->accessDate       = to_hfs_time(attrp->ca_atime);
                attrp->ca_atimeondisk  = attrp->ca_atime;       
                file->attributeModDate = to_hfs_time(attrp->ca_ctime);
                file->textEncoding     = descp->cd_encoding;
                file->attrBlocks       = attrp->ca_attrblks;
                bcopy(&attrp->ca_finderinfo[0], &file->userInfo, 32);
                /*
                 * Update the BSD Info if it was already initialized on
                 * disk or if the runtime values have been modified.
                 *
                 * If the BSD info was already initialized, but
                 * MNT_UNKNOWNPERMISSIONS is set, then the runtime IDs are
                 * probably different than what was on disk.  We don't want
                 * to overwrite the on-disk values (so if we turn off
                 * MNT_UNKNOWNPERMISSIONS, the old IDs get used again).
                 * This way, we can still change fields like the mode or
                 * dates even when MNT_UNKNOWNPERMISSIONS is set.
                 *
                 * Note that if MNT_UNKNOWNPERMISSIONS is set, hfs_chown
                 * won't change the uid or gid from their defaults.  So, if
                 * the BSD info wasn't set, and the runtime values are not
                 * default, then what changed was the mode or flags.  We
                 * have to set the uid and gid to something, so use the
                 * supplied values (which will be default), which has the
                 * same effect as creating a new file while
                 * MNT_UNKNOWNPERMISSIONS is set.
                 */
                if ((file->bsdInfo.fileMode != 0) ||
                    (attrp->ca_flags != 0) ||
                    (attrp->ca_uid != hfsmp->hfs_uid) ||
                    (attrp->ca_gid != hfsmp->hfs_gid) ||
                    ((attrp->ca_mode & ALLPERMS) !=
                     (hfsmp->hfs_file_mask & ACCESSPERMS))) {
                        if ((file->bsdInfo.fileMode == 0) ||
                            (((unsigned int)vfs_flags(HFSTOVFS(hfsmp))) & MNT_UNKNOWNPERMISSIONS) == 0) {
                                file->bsdInfo.ownerID = attrp->ca_uid;
                                file->bsdInfo.groupID = attrp->ca_gid;
                        }
                        file->bsdInfo.ownerFlags = attrp->ca_flags & 0x000000FF;
                        file->bsdInfo.adminFlags = attrp->ca_flags >> 16;
                        file->bsdInfo.fileMode   = attrp->ca_mode;
                }
                if (state->s_rsrcfork) {
                        forkp = state->s_rsrcfork;
                        file->resourceFork.logicalSize = forkp->cf_size;
                        file->resourceFork.totalBlocks = forkp->cf_blocks;
                        bcopy(&forkp->cf_extents[0], &file->resourceFork.extents,
                                sizeof(HFSPlusExtentRecord));
                        /* Push blocks read to disk */
                        file->resourceFork.clumpSize =
                                        howmany(forkp->cf_bytesread, blksize);
                }
                if (state->s_datafork) {
                        forkp = state->s_datafork;
                        file->dataFork.logicalSize = forkp->cf_size;
                        file->dataFork.totalBlocks = forkp->cf_blocks;
                        bcopy(&forkp->cf_extents[0], &file->dataFork.extents,
                                sizeof(HFSPlusExtentRecord));
                        /* Push blocks read to disk */
                        file->dataFork.clumpSize =
                                        howmany(forkp->cf_bytesread, blksize);
                }

                if ((file->resourceFork.extents[0].startBlock != 0) &&
                    (file->resourceFork.extents[0].startBlock ==
                     file->dataFork.extents[0].startBlock))
                        panic("catrec_update: rsrc fork == data fork");

                /* Synchronize the lock state */
                if (attrp->ca_flags & (SF_IMMUTABLE | UF_IMMUTABLE))
                        file->flags |= kHFSFileLockedMask;
                else
                        file->flags &= ~kHFSFileLockedMask;

                /* Push out special field if necessary */
                if (S_ISBLK(attrp->ca_mode) || S_ISCHR(attrp->ca_mode))
                        file->bsdInfo.special.rawDevice = attrp->ca_rdev;
                else if (descp->cd_cnid != attrp->ca_fileid
                     ||  attrp->ca_nlink == 2)
                        file->bsdInfo.special.linkCount = attrp->ca_nlink;
                break;
        }
        default:
                return (btNotFound);
        }
        return (0);
}

/*
 * Callback to collect directory entries.
 * Called with readattr_state for each item in a directory.
 */
struct readattr_state {
        struct hfsmount *hfsmp;
        struct cat_entrylist *list;
        cnid_t  dir_cnid;
        int stdhfs;
        int error;
};

static int
cat_readattr(const CatalogKey *key, const CatalogRecord *rec,
             struct readattr_state *state)
{
        struct cat_entrylist *list = state->list;
        struct hfsmount *hfsmp = state->hfsmp;
        struct cat_entry *cep;
        cnid_t parentcnid;

        if (list->realentries >= list->maxentries)
                return (0);  /* stop */
        
        parentcnid = state->stdhfs ? key->hfs.parentID : key->hfsPlus.parentID;

        switch(rec->recordType) {
        case kHFSPlusFolderRecord:
        case kHFSPlusFileRecord:
        case kHFSFolderRecord:
        case kHFSFileRecord:
                if (parentcnid != state->dir_cnid) {
                        state->error = ENOENT;
                        return (0);     /* stop */
                }
                break;
        default:
                state->error = ENOENT;
                return (0);     /* stop */
        }

        /* Hide the private meta data directory and journal files */
        if (parentcnid == kHFSRootFolderID) {
                if ((rec->recordType == kHFSPlusFolderRecord) &&
                    (rec->hfsPlusFolder.folderID == hfsmp->hfs_privdir_desc.cd_cnid)) {
                        return (1);     /* continue */
                }
                if ((hfsmp->jnl || ((HFSTOVCB(hfsmp)->vcbAtrb & kHFSVolumeJournaledMask) && (hfsmp->hfs_flags & HFS_READ_ONLY))) &&
                    (rec->recordType == kHFSPlusFileRecord) &&
                    ((rec->hfsPlusFile.fileID == hfsmp->hfs_jnlfileid) ||
                     (rec->hfsPlusFile.fileID == hfsmp->hfs_jnlinfoblkid))) {

                        return (1);     /* continue */
                }
        }

        cep = &list->entry[list->realentries++];

        if (state->stdhfs) {
                struct HFSPlusCatalogFile cnoderec;
                HFSPlusCatalogKey * pluskey;
                long encoding;

                promoteattr(hfsmp, rec, &cnoderec);
                getbsdattr(hfsmp, &cnoderec, &cep->ce_attr);

                MALLOC(pluskey, HFSPlusCatalogKey *, sizeof(HFSPlusCatalogKey), M_TEMP, M_WAITOK);
                promotekey(hfsmp, (HFSCatalogKey *)key, pluskey, &encoding);
                builddesc(pluskey, getcnid(rec), 0, encoding, isadir(rec), &cep->ce_desc);
                FREE(pluskey, M_TEMP);

                if (rec->recordType == kHFSFileRecord) {
                        int blksize = HFSTOVCB(hfsmp)->blockSize;

                        cep->ce_datasize = rec->hfsFile.dataLogicalSize;
                        cep->ce_datablks = rec->hfsFile.dataPhysicalSize / blksize;
                        cep->ce_rsrcsize = rec->hfsFile.rsrcLogicalSize;
                        cep->ce_rsrcblks = rec->hfsFile.rsrcPhysicalSize / blksize;
                }
        } else {
                getbsdattr(hfsmp, (struct HFSPlusCatalogFile *)rec, &cep->ce_attr);
                builddesc((HFSPlusCatalogKey *)key, getcnid(rec), 0, getencoding(rec),
                        isadir(rec), &cep->ce_desc);
                
                if (rec->recordType == kHFSPlusFileRecord) {
                        cep->ce_datasize = rec->hfsPlusFile.dataFork.logicalSize;
                        cep->ce_datablks = rec->hfsPlusFile.dataFork.totalBlocks;
                        cep->ce_rsrcsize = rec->hfsPlusFile.resourceFork.logicalSize;
                        cep->ce_rsrcblks = rec->hfsPlusFile.resourceFork.totalBlocks;
                        
                        /* Save link reference for later processing. */
                        if ((SWAP_BE32(rec->hfsPlusFile.userInfo.fdType) == kHardLinkFileType)
                        &&  (SWAP_BE32(rec->hfsPlusFile.userInfo.fdCreator) == kHFSPlusCreator))
                                cep->ce_attr.ca_rdev = rec->hfsPlusFile.bsdInfo.special.iNodeNum;
                }
        }

        return (list->realentries < list->maxentries);
}

/*
 * Pack a cat_entrylist buffer with attributes from the catalog
 *
 * Note: index is zero relative
 */
__private_extern__
int
cat_getentriesattr(struct hfsmount *hfsmp, directoryhint_t *dirhint, struct cat_entrylist *ce_list)
{
        FCB* fcb;
        CatalogKey * key;
        BTreeIterator * iterator;
        struct readattr_state state;
        cnid_t parentcnid;
        int i;
        int std_hfs;
        int index;
        int have_key;
        int result = 0;

        ce_list->realentries = 0;

        fcb = GetFileControlBlock(HFSTOVCB(hfsmp)->catalogRefNum);
        std_hfs = (HFSTOVCB(hfsmp)->vcbSigWord == kHFSSigWord);
        parentcnid = dirhint->dh_desc.cd_parentcnid;

        state.hfsmp = hfsmp;
        state.list = ce_list;
        state.dir_cnid = parentcnid;
        state.stdhfs = std_hfs;
        state.error = 0;

        MALLOC(iterator, BTreeIterator *, sizeof(*iterator), M_TEMP, M_WAITOK);
        bzero(iterator, sizeof(*iterator));
        key = (CatalogKey *)&iterator->key;
        have_key = 0;
        iterator->hint.nodeNum = dirhint->dh_desc.cd_hint;
        index = dirhint->dh_index + 1;

        /*
         * Attempt to build a key from cached filename
         */
        if (dirhint->dh_desc.cd_namelen != 0) {
                if (buildkey(hfsmp, &dirhint->dh_desc, (HFSPlusCatalogKey *)key, 0) == 0) {
                        have_key = 1;
                }
        }

        /*
         * If the last entry wasn't cached then position the btree iterator
         */
        if ((index == 0) || !have_key) {
                /*
                 * Position the iterator at the directory's thread record.
                 * (i.e. just before the first entry)
                 */
                buildthreadkey(dirhint->dh_desc.cd_parentcnid, (hfsmp->hfs_flags & HFS_STANDARD), key);
                result = BTSearchRecord(fcb, iterator, NULL, NULL, iterator);
                if (result) {
                        result = MacToVFSError(result);
                        goto exit;
                }
        
                /*
                 * Iterate until we reach the entry just
                 * before the one we want to start with.
                 */
                if (index > 0) {
                        struct position_state ps;

                        ps.error = 0;
                        ps.count = 0;
                        ps.index = index;
                        ps.parentID = dirhint->dh_desc.cd_parentcnid;
                        ps.hfsmp = hfsmp;

                        result = BTIterateRecords(fcb, kBTreeNextRecord, iterator,
                                                  (IterateCallBackProcPtr)cat_findposition, &ps);
                        if (ps.error)
                                result = ps.error;
                        else
                                result = MacToVFSError(result);
                        if (result) {
                                result = MacToVFSError(result);
                                goto exit;
                        }
                }
        }

        /* Fill list with entries starting at iterator->key. */
        result = BTIterateRecords(fcb, kBTreeNextRecord, iterator,
                        (IterateCallBackProcPtr)cat_readattr, &state);

        if (state.error)
                result = state.error;
        else if (ce_list->realentries == 0)
                result = ENOENT;
        else
                result = MacToVFSError(result);

        if (std_hfs)
                goto exit;

        /*
         *  Resolve any hard links.
         */
        for (i = 0; i < (int)ce_list->realentries; ++i) {
                struct FndrFileInfo *fip;
                struct cat_entry *cep;
                struct HFSPlusCatalogFile filerec;

                cep = &ce_list->entry[i];
                if (!S_ISREG(cep->ce_attr.ca_mode))
                        continue;
        
                /* Note: Finder info is still in Big Endian */
                fip = (struct FndrFileInfo *)&cep->ce_attr.ca_finderinfo;

                /* Check for hard link signature. */
                if ((cep->ce_attr.ca_rdev != 0)
                &&  (SWAP_BE32(fip->fdType) == kHardLinkFileType)
                &&  (SWAP_BE32(fip->fdCreator) == kHFSPlusCreator)
                &&  ((cep->ce_attr.ca_itime == (time_t)HFSTOVCB(hfsmp)->vcbCrDate) ||
                     (cep->ce_attr.ca_itime == (time_t)hfsmp->hfs_metadata_createdate))) {

                        if (resolvelink(hfsmp, cep->ce_attr.ca_rdev, &filerec) != 0)
                                continue;
                        /* Repack entry from inode record. */
                        getbsdattr(hfsmp, &filerec, &cep->ce_attr);             
                        cep->ce_datasize = filerec.dataFork.logicalSize;
                        cep->ce_datablks = filerec.dataFork.totalBlocks;
                        cep->ce_rsrcsize = filerec.resourceFork.logicalSize;
                        cep->ce_rsrcblks = filerec.resourceFork.totalBlocks;
                }
        }
exit:
        FREE(iterator, M_TEMP);
        
        return MacToVFSError(result);
}

#define SMALL_DIRENTRY_SIZE  (int)(sizeof(struct dirent) - (MAXNAMLEN + 1) + 8)

/*
 * Callback to pack directory entries.
 * Called with packdirentry_state for each item in a directory.
 */

/* Hard link information collected during cat_getdirentries. */
struct linkinfo {
        u_long       link_ref;
        user_addr_t  dirent_addr;
};
typedef struct linkinfo linkinfo_t;

/* State information for the cat_packdirentry callback function. */
struct packdirentry_state {
        int            cbs_extended;
        u_int32_t      cbs_parentID;
        u_int32_t      cbs_index;
        uio_t          cbs_uio;
        ExtendedVCB *  cbs_hfsmp;
        int            cbs_result;
        int32_t        cbs_nlinks;
        int32_t        cbs_maxlinks;
        linkinfo_t *   cbs_linkinfo;
        struct cat_desc * cbs_desc;
//      struct dirent  * cbs_stdentry;
        // followign fields are only used for NFS readdir, which uses the next file id as the seek offset of each entry
        struct direntry * cbs_direntry;
        struct direntry * cbs_prevdirentry;
        u_int32_t      cbs_previlinkref;
        Boolean        cbs_hasprevdirentry;
        Boolean        cbs_eof;
};

static int
cat_packdirentry(const CatalogKey *ckp, const CatalogRecord *crp,
                 struct packdirentry_state *state)
{
        struct hfsmount *hfsmp;
        CatalogName *cnp;
        cnid_t curID;
        OSErr result;
        struct dirent catent;
        struct direntry * entry = NULL;
        time_t itime;
        u_int32_t ilinkref = 0;
        u_int32_t curlinkref = 0;
        cnid_t  cnid;
        int hide = 0;
        u_int8_t type;
        u_int8_t is_mangled = 0;
        char *nameptr;
        user_addr_t uiobase;
        size_t namelen = 0;
        size_t maxnamelen;
        size_t uiosize = 0;
        caddr_t uioaddr;
        Boolean stop_after_pack = false;
        
        hfsmp = state->cbs_hfsmp;

        if (hfsmp->hfs_flags & HFS_STANDARD)
                curID = ckp->hfs.parentID;
        else
                curID = ckp->hfsPlus.parentID;

        /* We're done when parent directory changes */
        if (state->cbs_parentID != curID) {
                if (state->cbs_extended) {
                        if (state->cbs_hasprevdirentry) { /* the last record haven't been returned yet, so we want to stop after
                                                                                           * packing the last item */
                                stop_after_pack = true;
                        } else {
                                state->cbs_result = ENOENT;
                                return (0);     /* stop */
                        }                               
                } else {
                        state->cbs_result = ENOENT;
                        return (0);     /* stop */
                }
        }

        if (state->cbs_extended) {
                entry = state->cbs_direntry;
                nameptr = &entry->d_name[0];
                maxnamelen = NAME_MAX;
        } else {
                nameptr = &catent.d_name[0];
                maxnamelen = NAME_MAX;
        }

        if (state->cbs_extended && stop_after_pack) {
                cnid = INT_MAX;                 /* the last item returns a non-zero invalid cookie */
        } else {
                if (!(hfsmp->hfs_flags & HFS_STANDARD)) {
                        switch(crp->recordType) {
                        case kHFSPlusFolderRecord:
                                type = DT_DIR;
                                cnid = crp->hfsPlusFolder.folderID;
                                /* Hide our private meta data directory */
                                if ((curID == kHFSRootFolderID) &&
                                        (cnid == hfsmp->hfs_privdir_desc.cd_cnid)) {
                                        hide = 1;
                                }

                                break;
                        case kHFSPlusFileRecord:
                                itime = to_bsd_time(crp->hfsPlusFile.createDate);
                                /*
                                 * When a hardlink link is encountered save its link ref.
                                 */
                                if ((SWAP_BE32(crp->hfsPlusFile.userInfo.fdType) == kHardLinkFileType) &&
                                        (SWAP_BE32(crp->hfsPlusFile.userInfo.fdCreator) == kHFSPlusCreator) &&
                                        ((itime == (time_t)hfsmp->hfs_itime) ||
                                         (itime == (time_t)hfsmp->hfs_metadata_createdate))) {
                                        ilinkref = crp->hfsPlusFile.bsdInfo.special.iNodeNum;
                                }
                                type = MODE_TO_DT(crp->hfsPlusFile.bsdInfo.fileMode);
                                cnid = crp->hfsPlusFile.fileID;
                                /* Hide the journal files */
                                if ((curID == kHFSRootFolderID) &&
                                        ((hfsmp->jnl || ((HFSTOVCB(hfsmp)->vcbAtrb & kHFSVolumeJournaledMask) && (hfsmp->hfs_flags & HFS_READ_ONLY)))) &&
                                        ((cnid == hfsmp->hfs_jnlfileid) ||
                                         (cnid == hfsmp->hfs_jnlinfoblkid))) {
                                        hide = 1;
                                }
                                break;
                        default:
                                return (0);     /* stop */
                        };

                        cnp = (CatalogName*) &ckp->hfsPlus.nodeName;
                        result = utf8_encodestr(cnp->ustr.unicode, cnp->ustr.length * sizeof(UniChar),
                                                                        nameptr, &namelen, maxnamelen + 1, ':', 0);
                        if (result == ENAMETOOLONG) {
                                result = ConvertUnicodeToUTF8Mangled(cnp->ustr.length * sizeof(UniChar),
                                                                                                         cnp->ustr.unicode, maxnamelen + 1,
                                                                                                         (ByteCount*)&namelen, nameptr,
                                                                                                         cnid);         
                                is_mangled = 1;
                        }
                } else { /* hfs */
                        switch(crp->recordType) {
                        case kHFSFolderRecord:
                                type = DT_DIR;
                                cnid = crp->hfsFolder.folderID;
                                break;
                        case kHFSFileRecord:
                                type = DT_REG;
                                cnid = crp->hfsFile.fileID;
                                break;
                        default:
                                return (0);     /* stop */
                        };

                        cnp = (CatalogName*) ckp->hfs.nodeName;
                        result = hfs_to_utf8(hfsmp, cnp->pstr, maxnamelen + 1,
                                                                 (ByteCount *)&namelen, nameptr);
                        /*
                         * When an HFS name cannot be encoded with the current
                         * volume encoding we use MacRoman as a fallback.
                         */
                        if (result)
                                result = mac_roman_to_utf8(cnp->pstr, maxnamelen + 1,
                                                                                   (ByteCount *)&namelen, nameptr);
                }
        }

        if (state->cbs_extended) {
                /*
                 * The index is 1 relative and includes "." and ".."
                 *
                 * Also stuff the cnid in the upper 32 bits of the cookie.  The cookie is stored to the previous entry, which
                 * will be packed and copied this time
                 */
                state->cbs_prevdirentry->d_seekoff = (state->cbs_index + 3) | ((u_int64_t)cnid << 32);
                uiosize = state->cbs_prevdirentry->d_reclen;
                uioaddr = (caddr_t) state->cbs_prevdirentry;
        } else {
                catent.d_type = type;
                catent.d_namlen = namelen;
                catent.d_reclen = uiosize = STD_DIRENT_LEN(namelen);
                if (hide)
                        catent.d_fileno = 0;  /* file number = 0 means skip entry */
                else
                        catent.d_fileno = cnid;
                uioaddr = (caddr_t) &catent;
        }

        /* Save current base address for post processing of hard-links. */
        uiobase = uio_curriovbase(state->cbs_uio);

        /* If this entry won't fit then we're done */
        if ((uiosize > uio_resid(state->cbs_uio)) ||
            (ilinkref != 0 && state->cbs_nlinks == state->cbs_maxlinks)) {
                return (0);     /* stop */
        }

        if (!state->cbs_extended || state->cbs_hasprevdirentry) {
                state->cbs_result = uiomove(uioaddr, uiosize, state->cbs_uio);
                if (state->cbs_result == 0) {
                        ++state->cbs_index;

                        /* Remember previous entry */
                        state->cbs_desc->cd_cnid = cnid;
                        if (type == DT_DIR) {
                                state->cbs_desc->cd_flags |= CD_ISDIR;
                        } else {
                                state->cbs_desc->cd_flags &= ~CD_ISDIR;
                        }
                        if (state->cbs_desc->cd_nameptr != NULL) {
                                vfs_removename(state->cbs_desc->cd_nameptr);
                        }
#if 0
                        state->cbs_desc->cd_encoding = xxxx;
#endif
                        if (!is_mangled) {
                                state->cbs_desc->cd_namelen = namelen;
                                state->cbs_desc->cd_nameptr = vfs_addname(nameptr, namelen, 0, 0);
                        } else {
                                /* Store unmangled name for the directory hint else it will 
                                 * restart readdir at the last location again 
                                 */
                                char *new_nameptr;
                                size_t bufsize;
                                size_t tmp_namelen = 0;
                        
                                cnp = (CatalogName *)&ckp->hfsPlus.nodeName;
                                bufsize = 1 + utf8_encodelen(cnp->ustr.unicode,
                                                                                         cnp->ustr.length * sizeof(UniChar),
                                                                                         ':', 0);
                                MALLOC(new_nameptr, char *, bufsize, M_TEMP, M_WAITOK);
                                result = utf8_encodestr(cnp->ustr.unicode,
                                                                                cnp->ustr.length * sizeof(UniChar),
                                                                                new_nameptr, &tmp_namelen,
                                                                                bufsize, ':', 0);
                        
                                state->cbs_desc->cd_namelen = tmp_namelen;
                                state->cbs_desc->cd_nameptr = vfs_addname(new_nameptr, tmp_namelen, 0, 0);
                        
                                FREE(new_nameptr, M_TEMP);
                        } 
                }
                if (state->cbs_hasprevdirentry) {
                        curlinkref = ilinkref;               /* save current */
                        ilinkref = state->cbs_previlinkref;  /* use previous */
                }
                /*
                 * Record any hard links for post processing.
                 */
                if ((ilinkref != 0) &&
                        (state->cbs_result == 0) &&
                        (state->cbs_nlinks < state->cbs_maxlinks)) {
                        state->cbs_linkinfo[state->cbs_nlinks].dirent_addr = uiobase;
                        state->cbs_linkinfo[state->cbs_nlinks].link_ref = ilinkref;
                        state->cbs_nlinks++;
                }
                if (state->cbs_hasprevdirentry) {
                        ilinkref = curlinkref;   /* restore current */
                }
        }

        if (state->cbs_extended) {      /* fill the direntry to be used the next time */
                if (stop_after_pack) {
                        state->cbs_eof = true;
                        return (0);     /* stop */
                }
                entry->d_type = type;
                entry->d_namlen = namelen;
                entry->d_reclen = EXT_DIRENT_LEN(namelen);
                if (hide)
                        entry->d_fileno = 0;  /* file number = 0 means skip entry */
                else
                        entry->d_fileno = cnid;
                /* swap the current and previous entry */
                struct direntry * tmp;
                tmp = state->cbs_direntry;
                state->cbs_direntry = state->cbs_prevdirentry;
                state->cbs_prevdirentry = tmp;
                state->cbs_hasprevdirentry = true;
                state->cbs_previlinkref = ilinkref;
        }

        /* Continue iteration if there's room */
        return (state->cbs_result == 0  &&
                uio_resid(state->cbs_uio) >= SMALL_DIRENTRY_SIZE);
}


/*
 * Pack a uio buffer with directory entries from the catalog
 */
__private_extern__
int
cat_getdirentries(struct hfsmount *hfsmp, int entrycnt, directoryhint_t *dirhint,
                                  uio_t uio, int extended, int * items, int * eofflag)
{
        FCB* fcb;
        BTreeIterator * iterator;
        CatalogKey * key;
        struct packdirentry_state state;
        void * buffer;
        int bufsize;
        int maxlinks;
        int result;
        int index;
        int have_key;
        
        fcb = GetFileControlBlock(hfsmp->hfs_catalog_vp);

        /*
         * Get a buffer for link info array, btree iterator and a direntry:
         */
        maxlinks = MIN(entrycnt, uio_resid(uio) / SMALL_DIRENTRY_SIZE);
        bufsize = (maxlinks * sizeof(linkinfo_t)) + sizeof(*iterator);
        if (extended) {
                bufsize += 2*sizeof(struct direntry);
        }
        MALLOC(buffer, void *, bufsize, M_TEMP, M_WAITOK);
        bzero(buffer, bufsize);

        state.cbs_extended = extended;
        state.cbs_hasprevdirentry = false;
        state.cbs_previlinkref = 0;
        state.cbs_nlinks = 0;
        state.cbs_maxlinks = maxlinks;
        state.cbs_linkinfo = (linkinfo_t *) buffer;

        iterator = (BTreeIterator *) ((char *)buffer + (maxlinks * sizeof(linkinfo_t)));
        key = (CatalogKey *)&iterator->key;
        have_key = 0;
        index = dirhint->dh_index + 1;
        if (extended) {
                state.cbs_direntry = (struct direntry *)((char *)iterator + sizeof(BTreeIterator));
                state.cbs_prevdirentry = state.cbs_direntry + 1;
                state.cbs_eof = false;
        }
        /*
         * Attempt to build a key from cached filename
         */
        if (dirhint->dh_desc.cd_namelen != 0) {
                if (buildkey(hfsmp, &dirhint->dh_desc, (HFSPlusCatalogKey *)key, 0) == 0) {
                        have_key = 1;
                }
        }

        /*
         * If the last entry wasn't cached then position the btree iterator
         */
        if ((index == 0) || !have_key) {
                /*
                 * Position the iterator at the directory's thread record.
                 * (i.e. just before the first entry)
                 */
                buildthreadkey(dirhint->dh_desc.cd_parentcnid, (hfsmp->hfs_flags & HFS_STANDARD), key);
                result = BTSearchRecord(fcb, iterator, NULL, NULL, iterator);
                if (result) {
                        result = MacToVFSError(result);
                        goto cleanup;
                }
        
                /*
                 * Iterate until we reach the entry just
                 * before the one we want to start with.
                 */
                if (index > 0) {
                        struct position_state ps;

                        ps.error = 0;
                        ps.count = 0;
                        ps.index = index;
                        ps.parentID = dirhint->dh_desc.cd_parentcnid;
                        ps.hfsmp = hfsmp;

                        result = BTIterateRecords(fcb, kBTreeNextRecord, iterator,
                                                  (IterateCallBackProcPtr)cat_findposition, &ps);
                        if (ps.error)
                                result = ps.error;
                        else
                                result = MacToVFSError(result);
                        if (result) {
                                result = MacToVFSError(result);
                                goto cleanup;
                        }
                }
        }

        state.cbs_index = index;
        state.cbs_hfsmp = hfsmp;
        state.cbs_uio = uio;
        state.cbs_desc = &dirhint->dh_desc;
        state.cbs_result = 0;
        state.cbs_parentID = dirhint->dh_desc.cd_parentcnid;

        enum BTreeIterationOperations op;
        if (extended && index != 0 && have_key)
                op = kBTreeCurrentRecord;
        else
                op = kBTreeNextRecord;

        /*
         * Process as many entries as possible starting at iterator->key.
         */
        result = BTIterateRecords(fcb, op, iterator,
                                  (IterateCallBackProcPtr)cat_packdirentry, &state);

        /* If readdir is called for NFS and BTIterateRecords reaches the end of the
         * Catalog BTree, call cat_packdirentry() with dummy values to copy previous 
         * direntry stored in state to the user buffer.
         */
        if (state.cbs_extended && (result == fsBTRecordNotFoundErr)) {
                CatalogKey ckp;
                CatalogRecord crp;

                bzero(&ckp, sizeof(ckp));
                bzero(&crp, sizeof(crp));

                result = cat_packdirentry(&ckp, &crp, &state);
        }

        /* Note that state.cbs_index is still valid on errors */
        *items = state.cbs_index - index;
        index = state.cbs_index;

        if (state.cbs_eof) {
                *eofflag = 1;
        }
        
        /* Finish updating the catalog iterator. */
        dirhint->dh_desc.cd_hint = iterator->hint.nodeNum;
        dirhint->dh_desc.cd_flags |= CD_DECOMPOSED;
        dirhint->dh_index = index - 1;
        
        /*
         * Post process any hard links to get the real file id.
         */
        if (state.cbs_nlinks > 0) {
                u_int32_t fileid = 0;
                user_addr_t address;
                int i;

                for (i = 0; i < state.cbs_nlinks; ++i) {
                        if (resolvelinkid(hfsmp, state.cbs_linkinfo[i].link_ref, &fileid) != 0)
                                continue;
                        /* This assumes that d_ino is always first field. */
                        address = state.cbs_linkinfo[i].dirent_addr;
                        if (address == (user_addr_t)0)
                                continue;
                        if (uio_isuserspace(uio)) {
                                (void) copyout(&fileid, address,
                                               extended ? sizeof(ino64_t) : sizeof(ino_t));
                        } else /* system space */ {
                                ino64_t *inoptr = (ino64_t *)CAST_DOWN(caddr_t, address);
                                *inoptr = fileid;
                        }
                }
        }

        if (state.cbs_result)
                result = state.cbs_result;
        else
                result = MacToVFSError(result);

        if (result == ENOENT) {
                result = 0;
        }

cleanup:
        FREE(buffer, M_TEMP);
        
        return (result);
}


/*
 * Callback to establish directory position.
 * Called with position_state for each item in a directory.
 */
static int
cat_findposition(const CatalogKey *ckp, const CatalogRecord *crp,
                 struct position_state *state)
{
        cnid_t curID;

        if (state->hfsmp->hfs_flags & HFS_STANDARD)
                curID = ckp->hfs.parentID;
        else
                curID = ckp->hfsPlus.parentID;

        /* Make sure parent directory didn't change */
        if (state->parentID != curID) {
                state->error = EINVAL;
                return (0);  /* stop */
        }

        /* Count this entry */
        switch(crp->recordType) {
        case kHFSPlusFolderRecord:
        case kHFSPlusFileRecord:
        case kHFSFolderRecord:
        case kHFSFileRecord:
                ++state->count;
                break;
        default:
                printf("cat_findposition: invalid record type %d in dir %d\n",
                        crp->recordType, curID);
                state->error = EINVAL;
                return (0);  /* stop */
        };

        return (state->count < state->index);
}


/*
 * cat_binarykeycompare - compare two HFS Plus catalog keys.

 * The name portion of the key is compared using a 16-bit binary comparison. 
 * This is called from the b-tree code.
 */
__private_extern__
int
cat_binarykeycompare(HFSPlusCatalogKey *searchKey, HFSPlusCatalogKey *trialKey)
{
        u_int32_t searchParentID, trialParentID;
        int result;

        searchParentID = searchKey->parentID;
        trialParentID = trialKey->parentID;
        result = 0;
        
        if (searchParentID > trialParentID) {
                ++result;
        } else if (searchParentID < trialParentID) {
                --result;
        } else {
                u_int16_t * str1 = &searchKey->nodeName.unicode[0];
                u_int16_t * str2 = &trialKey->nodeName.unicode[0];
                int length1 = searchKey->nodeName.length;
                int length2 = trialKey->nodeName.length;
                u_int16_t c1, c2;
                int length;
        
                if (length1 < length2) {
                        length = length1;
                        --result;
                } else if (length1 > length2) {
                        length = length2;
                        ++result;
                } else {
                        length = length1;
                }
        
                while (length--) {
                        c1 = *(str1++);
                        c2 = *(str2++);
        
                        if (c1 > c2) {
                                result = 1;
                                break;
                        }
                        if (c1 < c2) {
                                result = -1;
                                break;
                        }
                }
        }

        return result;
}


/*
 * Compare two standard HFS catalog keys
 *
 * Result: +n  search key > trial key
 *          0  search key = trial key
 *         -n  search key < trial key
 */
int
CompareCatalogKeys(HFSCatalogKey *searchKey, HFSCatalogKey *trialKey)
{
        cnid_t searchParentID, trialParentID;
        int result;

        searchParentID = searchKey->parentID;
        trialParentID = trialKey->parentID;

        if (searchParentID > trialParentID)
                result = 1;
        else if (searchParentID < trialParentID)
                result = -1;
        else /* parent dirID's are equal, compare names */
                result = FastRelString(searchKey->nodeName, trialKey->nodeName);

        return result;
}


/*
 * Compare two HFS+ catalog keys
 *
 * Result: +n  search key > trial key
 *          0  search key = trial key
 *         -n  search key < trial key
 */
int
CompareExtendedCatalogKeys(HFSPlusCatalogKey *searchKey, HFSPlusCatalogKey *trialKey)
{
        cnid_t searchParentID, trialParentID;
        int result;

        searchParentID = searchKey->parentID;
        trialParentID = trialKey->parentID;
        
        if (searchParentID > trialParentID) {
                result = 1;
        }
        else if (searchParentID < trialParentID) {
                result = -1;
        } else {
                /* parent node ID's are equal, compare names */
                if ( searchKey->nodeName.length == 0 || trialKey->nodeName.length == 0 )
                        result = searchKey->nodeName.length - trialKey->nodeName.length;
                else
                        result = FastUnicodeCompare(&searchKey->nodeName.unicode[0],
                                                    searchKey->nodeName.length,
                                                    &trialKey->nodeName.unicode[0],
                                                    trialKey->nodeName.length);
        }

        return result;
}


/*
 * buildkey - build a Catalog b-tree key from a cnode descriptor
 */
static int
buildkey(struct hfsmount *hfsmp, struct cat_desc *descp,
        HFSPlusCatalogKey *key, int retry)
{
        int utf8_flags = 0;
        int result = 0;
        size_t unicodeBytes = 0;

        if (descp->cd_namelen == 0 || descp->cd_nameptr[0] == '\0')
                return (EINVAL);  /* invalid name */

        key->parentID = descp->cd_parentcnid;
        key->nodeName.length = 0;
        /*
         * Convert filename from UTF-8 into Unicode
         */
        
        if ((descp->cd_flags & CD_DECOMPOSED) == 0)
                utf8_flags |= UTF_DECOMPOSED;
        result = utf8_decodestr(descp->cd_nameptr, descp->cd_namelen,
                key->nodeName.unicode, &unicodeBytes,
                sizeof(key->nodeName.unicode), ':', utf8_flags);
        key->nodeName.length = unicodeBytes / sizeof(UniChar);
        key->keyLength = kHFSPlusCatalogKeyMinimumLength + unicodeBytes;
        if (result) {
                if (result != ENAMETOOLONG)
                        result = EINVAL;  /* name has invalid characters */
                return (result);
        }

        /*
         * For HFS volumes convert to an HFS compatible key
         *
         * XXX need to save the encoding that succeeded
         */
        if (HFSTOVCB(hfsmp)->vcbSigWord == kHFSSigWord) {
                HFSCatalogKey hfskey;

                bzero(&hfskey, sizeof(hfskey));
                hfskey.keyLength = kHFSCatalogKeyMinimumLength;
                hfskey.parentID = key->parentID;
                hfskey.nodeName[0] = 0;
                if (key->nodeName.length > 0) {
                        if (unicode_to_hfs(HFSTOVCB(hfsmp),
                                key->nodeName.length * 2,
                                key->nodeName.unicode,
                                &hfskey.nodeName[0], retry) != 0) {
                                return (EINVAL);
                        }
                        hfskey.keyLength += hfskey.nodeName[0];
                }
                bcopy(&hfskey, key, sizeof(hfskey));
        }
        return (0);
 }


/*
 * Resolve hard link reference to obtain the inode record.
 */
__private_extern__
int
resolvelink(struct hfsmount *hfsmp, u_long linkref, struct HFSPlusCatalogFile *recp)
{
        FSBufferDescriptor btdata;
        struct BTreeIterator *iterator;
        struct cat_desc idesc;
        char inodename[32];
        int result = 0;

        BDINIT(btdata, recp);
        MAKE_INODE_NAME(inodename, linkref);

        /* Get space for iterator */    
        MALLOC(iterator, BTreeIterator *, sizeof(*iterator), M_TEMP, M_WAITOK);
        bzero(iterator, sizeof(*iterator));

        /* Build a descriptor for private dir. */       
        idesc.cd_parentcnid = hfsmp->hfs_privdir_desc.cd_cnid;
        idesc.cd_nameptr = inodename;
        idesc.cd_namelen = strlen(inodename);
        idesc.cd_flags = 0;
        idesc.cd_hint = 0;
        idesc.cd_encoding = 0;
        (void) buildkey(hfsmp, &idesc, (HFSPlusCatalogKey *)&iterator->key, 0);

        result = BTSearchRecord(VTOF(HFSTOVCB(hfsmp)->catalogRefNum), iterator,
                                &btdata, NULL, NULL);

        if (result == 0) {
                /* Make sure there's a reference */
                if (recp->bsdInfo.special.linkCount == 0)
                        recp->bsdInfo.special.linkCount = 2;
        } else {
                printf("HFS resolvelink: can't find %s\n", inodename);
        }

        FREE(iterator, M_TEMP);

        return (result ? ENOENT : 0);
}

/*
 * Resolve hard link reference to obtain the inode number.
 */
static int
resolvelinkid(struct hfsmount *hfsmp, u_long linkref, ino_t *ino)
{
        struct HFSPlusCatalogFile record;
        int error;
        
        error = resolvelink(hfsmp, linkref, &record);
        if (error == 0) {
                if (record.fileID == 0)
                        error = ENOENT;
                else
                        *ino = record.fileID;
        }
        return (error);
}

/*
 * getkey - get a key from id by doing a thread lookup
 */
static int
getkey(struct hfsmount *hfsmp, cnid_t cnid, CatalogKey * key)
{
        struct BTreeIterator * iterator;
        FSBufferDescriptor btdata;
        UInt16  datasize;
        CatalogKey * keyp;
        CatalogRecord * recp;
        int result;
        int std_hfs;

        std_hfs = (HFSTOVCB(hfsmp)->vcbSigWord == kHFSSigWord);

        MALLOC(iterator, BTreeIterator *, sizeof(*iterator), M_TEMP, M_WAITOK);
        bzero(iterator, sizeof(*iterator));
        buildthreadkey(cnid, std_hfs, (CatalogKey *)&iterator->key);

        MALLOC(recp, CatalogRecord *, sizeof(CatalogRecord), M_TEMP, M_WAITOK);
        BDINIT(btdata, recp);

        result = BTSearchRecord(VTOF(HFSTOVCB(hfsmp)->catalogRefNum), iterator,
                                &btdata, &datasize, iterator);
        if (result)
                goto exit;

        /* Turn thread record into a cnode key (in place) */
        switch (recp->recordType) {
        case kHFSFileThreadRecord:
        case kHFSFolderThreadRecord:
                keyp = (CatalogKey *)((char *)&recp->hfsThread.reserved + 6);
                keyp->hfs.keyLength = kHFSCatalogKeyMinimumLength + keyp->hfs.nodeName[0];
                bcopy(keyp, key, keyp->hfs.keyLength + 1);
                break;

        case kHFSPlusFileThreadRecord:
        case kHFSPlusFolderThreadRecord:
                keyp = (CatalogKey *)&recp->hfsPlusThread.reserved;
                keyp->hfsPlus.keyLength = kHFSPlusCatalogKeyMinimumLength +
                                          (keyp->hfsPlus.nodeName.length * 2);
                bcopy(keyp, key, keyp->hfsPlus.keyLength + 2);
                break;

        default:
                result = ENOENT;
                break;
        }

exit:
        FREE(iterator, M_TEMP);
        FREE(recp, M_TEMP);

        return MacToVFSError(result);
}

/*
 * getkeyplusattr - From id, fetch the key and the bsd attrs for a file/dir (could pass
 * null arguments to cat_idlookup instead, but we save around 10% by not building the 
 * cat_desc here). Both key and attrp must point to real structures.
 */
__private_extern__
int
cat_getkeyplusattr(struct hfsmount *hfsmp, cnid_t cnid, CatalogKey * key, struct cat_attr *attrp)
{
        int result;

        result = getkey(hfsmp, cnid, key);
       
        if (result == 0) {
                result = cat_lookupbykey(hfsmp, key, 0, 0, NULL, attrp, NULL, NULL);
        }

        return MacToVFSError(result);
}


/*
 * buildrecord - build a default catalog directory or file record
 */
static void
buildrecord(struct cat_attr *attrp, cnid_t cnid, int std_hfs, u_int32_t encoding,
            CatalogRecord *crp, int *recordSize)
{
        int type = attrp->ca_mode & S_IFMT;
        u_int32_t createtime = to_hfs_time(attrp->ca_itime);

        if (std_hfs) {
                createtime = UTCToLocal(createtime);
                if (type == S_IFDIR) {
                        bzero(crp, sizeof(HFSCatalogFolder));
                        crp->recordType = kHFSFolderRecord;
                        crp->hfsFolder.folderID = cnid;
                        crp->hfsFolder.createDate = createtime;
                        crp->hfsFolder.modifyDate = createtime;
                        bcopy(attrp->ca_finderinfo, &crp->hfsFolder.userInfo, 32);
                        *recordSize = sizeof(HFSCatalogFolder);
                } else {
                        bzero(crp, sizeof(HFSCatalogFile));
                        crp->recordType = kHFSFileRecord;
                        crp->hfsFile.fileID = cnid;
                        crp->hfsFile.createDate = createtime;
                        crp->hfsFile.modifyDate = createtime;
                        bcopy(attrp->ca_finderinfo, &crp->hfsFile.userInfo, 16);
                        bcopy(&attrp->ca_finderinfo[16], &crp->hfsFile.finderInfo, 16);
                        *recordSize = sizeof(HFSCatalogFile);
                }
        } else {
                struct HFSPlusBSDInfo * bsdp = NULL;
                struct FndrFileInfo * fip = NULL;

                if (type == S_IFDIR) {
                        crp->recordType = kHFSPlusFolderRecord;
                        crp->hfsPlusFolder.flags = 0;
                        crp->hfsPlusFolder.valence = 0;
                        crp->hfsPlusFolder.folderID = cnid;     
                        crp->hfsPlusFolder.createDate = createtime;
                        crp->hfsPlusFolder.contentModDate = createtime;
                        crp->hfsPlusFolder.attributeModDate = createtime;
                        crp->hfsPlusFolder.accessDate = createtime;
                        crp->hfsPlusFolder.backupDate = 0;
                        crp->hfsPlusFolder.textEncoding = encoding;
                        crp->hfsPlusFolder.attrBlocks = 0;
                        bcopy(attrp->ca_finderinfo, &crp->hfsPlusFolder.userInfo, 32);
                        bsdp = &crp->hfsPlusFolder.bsdInfo;
                        bsdp->special.rawDevice = 0;
                        *recordSize = sizeof(HFSPlusCatalogFolder);
                } else {
                        crp->recordType = kHFSPlusFileRecord;
                        crp->hfsPlusFile.flags = kHFSThreadExistsMask;
                        crp->hfsPlusFile.reserved1 = 0;
                        crp->hfsPlusFile.fileID = cnid;
                        crp->hfsPlusFile.createDate = createtime;
                        crp->hfsPlusFile.contentModDate = createtime;
                        crp->hfsPlusFile.accessDate = createtime;
                        crp->hfsPlusFile.attributeModDate = createtime;
                        crp->hfsPlusFile.backupDate = 0;
                        crp->hfsPlusFile.textEncoding = encoding;
                        crp->hfsPlusFile.attrBlocks = 0;
                        bsdp = &crp->hfsPlusFile.bsdInfo;
                        bsdp->special.rawDevice = 0;
                        switch(type) {
                        case S_IFBLK:
                        case S_IFCHR:
                                /* BLK/CHR need to save the device info */
                                bsdp->special.rawDevice = attrp->ca_rdev;
                                bzero(&crp->hfsPlusFile.userInfo, 32);
                                break;
                        case S_IFREG:
                                /* Hardlink links need to save the linkref */
                                fip = (FndrFileInfo *)&attrp->ca_finderinfo;
                                if ((SWAP_BE32(fip->fdType) == kHardLinkFileType) &&
                                    (SWAP_BE32(fip->fdCreator) == kHFSPlusCreator)) {
                                        bsdp->special.iNodeNum = attrp->ca_rdev;
                                }
                                bcopy(attrp->ca_finderinfo, &crp->hfsPlusFile.userInfo, 32);
                                break;
                        case S_IFLNK:
                                /* Symlinks also have a type and creator */
                                bcopy(attrp->ca_finderinfo, &crp->hfsPlusFile.userInfo, 32);
                                break;
                        }
                        bzero(&crp->hfsPlusFile.dataFork, 2*sizeof(HFSPlusForkData));
                        *recordSize = sizeof(HFSPlusCatalogFile);
                }
                bsdp->ownerID    = attrp->ca_uid;
                bsdp->groupID    = attrp->ca_gid;
                bsdp->fileMode   = attrp->ca_mode;
                bsdp->adminFlags = attrp->ca_flags >> 16;
                bsdp->ownerFlags = attrp->ca_flags & 0x000000FF;
        }
}


/*
 * builddesc - build a cnode descriptor from an HFS+ key
 */
static int
builddesc(const HFSPlusCatalogKey *key, cnid_t cnid, u_long hint, u_long encoding,
        int isdir, struct cat_desc *descp)
{
        int result = 0;
        char * nameptr;
        size_t bufsize;
        size_t utf8len;
        char tmpbuff[128];

        /* guess a size... */
        bufsize = (3 * key->nodeName.length) + 1;
        if (bufsize >= sizeof(tmpbuff) - 1) {
            MALLOC(nameptr, char *, bufsize, M_TEMP, M_WAITOK);
        } else {
            nameptr = &tmpbuff[0];
        }

        result = utf8_encodestr(key->nodeName.unicode,
                        key->nodeName.length * sizeof(UniChar),
                        nameptr, (size_t *)&utf8len,
                        bufsize, ':', 0);

        if (result == ENAMETOOLONG) {
                bufsize = 1 + utf8_encodelen(key->nodeName.unicode,
                                             key->nodeName.length * sizeof(UniChar),
                                             ':', 0);
                FREE(nameptr, M_TEMP);
                MALLOC(nameptr, char *, bufsize, M_TEMP, M_WAITOK);

                result = utf8_encodestr(key->nodeName.unicode,
                                        key->nodeName.length * sizeof(UniChar),
                                        nameptr, (size_t *)&utf8len,
                                        bufsize, ':', 0);
        }
        descp->cd_parentcnid = key->parentID;
        descp->cd_nameptr = vfs_addname(nameptr, utf8len, 0, 0);
        descp->cd_namelen = utf8len;
        descp->cd_cnid = cnid;
        descp->cd_hint = hint;
        descp->cd_flags = CD_DECOMPOSED | CD_HASBUF;
        if (isdir)
                descp->cd_flags |= CD_ISDIR;    
        descp->cd_encoding = encoding;
        if (nameptr != &tmpbuff[0]) {
            FREE(nameptr, M_TEMP);
        }
        return result;
}


/*
 * getbsdattr - get attributes in bsd format
 *
 */
static void
getbsdattr(struct hfsmount *hfsmp, const struct HFSPlusCatalogFile *crp, struct cat_attr * attrp)
{
        int isDirectory = (crp->recordType == kHFSPlusFolderRecord);
        const struct HFSPlusBSDInfo *bsd = &crp->bsdInfo;

        attrp->ca_recflags = crp->flags;
        attrp->ca_nlink = 1;
        attrp->ca_atime = to_bsd_time(crp->accessDate);
        attrp->ca_atimeondisk = attrp->ca_atime;        
        attrp->ca_mtime = to_bsd_time(crp->contentModDate);
        attrp->ca_ctime = to_bsd_time(crp->attributeModDate);
        attrp->ca_itime = to_bsd_time(crp->createDate);
        attrp->ca_btime = to_bsd_time(crp->backupDate);

        if ((bsd->fileMode & S_IFMT) == 0) {
                attrp->ca_flags = 0;
                attrp->ca_uid = hfsmp->hfs_uid;
                attrp->ca_gid = hfsmp->hfs_gid;
                if (isDirectory)
                        attrp->ca_mode = S_IFDIR | (hfsmp->hfs_dir_mask & ACCESSPERMS);
                else
                        attrp->ca_mode = S_IFREG | (hfsmp->hfs_file_mask & ACCESSPERMS);
                attrp->ca_rdev = 0;
        } else {
                attrp->ca_rdev = 0;
                attrp->ca_uid = bsd->ownerID;
                attrp->ca_gid = bsd->groupID;
                attrp->ca_flags = bsd->ownerFlags | (bsd->adminFlags << 16);
                attrp->ca_mode = (mode_t)bsd->fileMode;
                switch (attrp->ca_mode & S_IFMT) {
                case S_IFCHR: /* fall through */
                case S_IFBLK:
                        attrp->ca_rdev = bsd->special.rawDevice;
                        break;
                case S_IFREG:
                        /* Pick up the hard link count */
                        if (bsd->special.linkCount > 0)
                                attrp->ca_nlink = bsd->special.linkCount;
                        break;
                }

                if (((unsigned int)vfs_flags(HFSTOVFS(hfsmp))) & MNT_UNKNOWNPERMISSIONS) {
                        /*
                         *  Override the permissions as determined by the mount auguments
                         *  in ALMOST the same way unset permissions are treated but keep
                         *  track of whether or not the file or folder is hfs locked
                         *  by leaving the h_pflags field unchanged from what was unpacked
                         *  out of the catalog.
                         */
                        attrp->ca_uid = hfsmp->hfs_uid;
                        attrp->ca_gid = hfsmp->hfs_gid;
                }
        }

        if (isDirectory) {
                if (!S_ISDIR(attrp->ca_mode)) {
                        attrp->ca_mode &= ~S_IFMT;
                        attrp->ca_mode |= S_IFDIR;
                }
                attrp->ca_nlink = 2 + ((HFSPlusCatalogFolder *)crp)->valence;
                attrp->ca_entries = ((HFSPlusCatalogFolder *)crp)->valence;
                attrp->ca_attrblks = ((HFSPlusCatalogFolder *)crp)->attrBlocks;
        } else {
                /* Keep IMMUTABLE bits in sync with HFS locked flag */
                if (crp->flags & kHFSFileLockedMask) {
                        /* The file's supposed to be locked:
                           Make sure at least one of the IMMUTABLE bits is set: */
                        if ((attrp->ca_flags & (SF_IMMUTABLE | UF_IMMUTABLE)) == 0)
                                attrp->ca_flags |= UF_IMMUTABLE;
                } else {
                        /* The file's supposed to be unlocked: */
                        attrp->ca_flags &= ~(SF_IMMUTABLE | UF_IMMUTABLE);
                }
                /* get total blocks (both forks) */
                attrp->ca_blocks = crp->dataFork.totalBlocks + crp->resourceFork.totalBlocks;
                attrp->ca_attrblks = crp->attrBlocks;
                /* On HFS+ the ThreadExists flag must always be set. */
                if ((hfsmp->hfs_flags & HFS_STANDARD) == 0)
                        attrp->ca_recflags |= kHFSThreadExistsMask;
        }
        
        attrp->ca_fileid = crp->fileID;

        bcopy(&crp->userInfo, attrp->ca_finderinfo, 32);
}

/*
 * promotekey - promote hfs key to hfs plus key
 *
 */
static void
promotekey(struct hfsmount *hfsmp, const HFSCatalogKey *hfskey,
           HFSPlusCatalogKey *keyp, u_long *encoding)
{
        hfs_to_unicode_func_t hfs_get_unicode = hfsmp->hfs_get_unicode;
        UInt32 uniCount;
        int error;

        *encoding = hfsmp->hfs_encoding;

        error = hfs_get_unicode(hfskey->nodeName, keyp->nodeName.unicode,
                                kHFSPlusMaxFileNameChars, &uniCount);
        /*
         * When an HFS name cannot be encoded with the current
         * encoding use MacRoman as a fallback.
         */
        if (error && hfsmp->hfs_encoding != kTextEncodingMacRoman) {
                *encoding = 0;
                (void) mac_roman_to_unicode(hfskey->nodeName,
                                            keyp->nodeName.unicode,
                                            kHFSPlusMaxFileNameChars,
                                            &uniCount);
        }

        keyp->nodeName.length = uniCount;
        keyp->parentID = hfskey->parentID;
}

/*
 * promotefork - promote hfs fork info to hfs plus
 *
 */
static void
promotefork(struct hfsmount *hfsmp, const struct HFSCatalogFile *filep,
            int resource, struct cat_fork * forkp)
{
        struct HFSPlusExtentDescriptor *xp;
        u_long blocksize = HFSTOVCB(hfsmp)->blockSize;

        bzero(forkp, sizeof(*forkp));
        xp = &forkp->cf_extents[0];
        if (resource) {
                forkp->cf_size = filep->rsrcLogicalSize;
                forkp->cf_blocks = filep->rsrcPhysicalSize / blocksize;
                forkp->cf_bytesread = 0;
                forkp->cf_vblocks = 0;
                xp[0].startBlock = (u_int32_t)filep->rsrcExtents[0].startBlock;
                xp[0].blockCount = (u_int32_t)filep->rsrcExtents[0].blockCount;
                xp[1].startBlock = (u_int32_t)filep->rsrcExtents[1].startBlock;
                xp[1].blockCount = (u_int32_t)filep->rsrcExtents[1].blockCount;
                xp[2].startBlock = (u_int32_t)filep->rsrcExtents[2].startBlock;
                xp[2].blockCount = (u_int32_t)filep->rsrcExtents[2].blockCount;
        } else {
                forkp->cf_size = filep->dataLogicalSize;
                forkp->cf_blocks = filep->dataPhysicalSize / blocksize;
                forkp->cf_bytesread = 0;
                forkp->cf_vblocks = 0;
                xp[0].startBlock = (u_int32_t)filep->dataExtents[0].startBlock;
                xp[0].blockCount = (u_int32_t)filep->dataExtents[0].blockCount;
                xp[1].startBlock = (u_int32_t)filep->dataExtents[1].startBlock;
                xp[1].blockCount = (u_int32_t)filep->dataExtents[1].blockCount;
                xp[2].startBlock = (u_int32_t)filep->dataExtents[2].startBlock;
                xp[2].blockCount = (u_int32_t)filep->dataExtents[2].blockCount;
        }
}

/*
 * promoteattr - promote hfs catalog attributes to hfs plus
 *
 */
static void
promoteattr(struct hfsmount *hfsmp, const CatalogRecord *dataPtr, struct HFSPlusCatalogFile *crp)
{
        u_long blocksize = HFSTOVCB(hfsmp)->blockSize;

        if (dataPtr->recordType == kHFSFolderRecord) {
                struct HFSCatalogFolder * folder;

                folder = (struct HFSCatalogFolder *) dataPtr;
                crp->recordType       = kHFSPlusFolderRecord;
                crp->flags            = folder->flags;
                crp->fileID           = folder->folderID;
                crp->createDate       = LocalToUTC(folder->createDate);
                crp->contentModDate   = LocalToUTC(folder->modifyDate);
                crp->backupDate       = LocalToUTC(folder->backupDate);
                crp->reserved1        = folder->valence;
                bcopy(&folder->userInfo, &crp->userInfo, 32);
        } else /* file */ {
                struct HFSCatalogFile * file;

                file = (struct HFSCatalogFile *) dataPtr;
                crp->recordType       = kHFSPlusFileRecord;
                crp->flags            = file->flags;
                crp->fileID           = file->fileID;
                crp->createDate       = LocalToUTC(file->createDate);
                crp->contentModDate   = LocalToUTC(file->modifyDate);
                crp->backupDate       = LocalToUTC(file->backupDate);
                crp->reserved1        = 0;
                bcopy(&file->userInfo, &crp->userInfo, 16);
                bcopy(&file->finderInfo, &crp->finderInfo, 16);
                crp->dataFork.totalBlocks = file->dataPhysicalSize / blocksize;
                crp->resourceFork.totalBlocks = file->rsrcPhysicalSize / blocksize;
        }
        crp->textEncoding = 0;
        crp->attributeModDate = crp->contentModDate;
        crp->accessDate = crp->contentModDate;
        bzero(&crp->bsdInfo, sizeof(HFSPlusBSDInfo));
        crp->attrBlocks = 0;
}

/*
 * Build a catalog node thread record from a catalog key
 * and return the size of the record.
 */
static int
buildthread(void *keyp, void *recp, int std_hfs, int directory)
{
        int size = 0;

        if (std_hfs) {
                HFSCatalogKey *key = (HFSCatalogKey *)keyp;
                HFSCatalogThread *rec = (HFSCatalogThread *)recp;

                size = sizeof(HFSCatalogThread);
                bzero(rec, size);
                if (directory)
                        rec->recordType = kHFSFolderThreadRecord;
                else
                        rec->recordType = kHFSFileThreadRecord;
                rec->parentID = key->parentID;
                bcopy(key->nodeName, rec->nodeName, key->nodeName[0]+1);

        } else /* HFS+ */ {
                HFSPlusCatalogKey *key = (HFSPlusCatalogKey *)keyp;
                HFSPlusCatalogThread *rec = (HFSPlusCatalogThread *)recp;

                size = sizeof(HFSPlusCatalogThread);
                if (directory)
                        rec->recordType = kHFSPlusFolderThreadRecord;
                else
                        rec->recordType = kHFSPlusFileThreadRecord;
                rec->reserved = 0;
                rec->parentID = key->parentID;                  
                bcopy(&key->nodeName, &rec->nodeName,
                        sizeof(UniChar) * (key->nodeName.length + 1));

                /* HFS Plus has varaible sized thread records */
                size -= (sizeof(rec->nodeName.unicode) -
                          (rec->nodeName.length * sizeof(UniChar)));
        }
        
        return (size);
}

/*
 * Build a catalog node thread key.
 */
static void
buildthreadkey(HFSCatalogNodeID parentID, int std_hfs, CatalogKey *key)
{
        if (std_hfs) {
                key->hfs.keyLength = kHFSCatalogKeyMinimumLength;
                key->hfs.reserved = 0;
                key->hfs.parentID = parentID;
                key->hfs.nodeName[0] = 0;
        } else {
                key->hfsPlus.keyLength = kHFSPlusCatalogKeyMinimumLength;
                key->hfsPlus.parentID = parentID;
                key->hfsPlus.nodeName.length = 0;
        }
}

/*
 * Extract the text encoding from a catalog node record.
 */
static u_long 
getencoding(const CatalogRecord *crp)
{
        u_long encoding;

        if (crp->recordType == kHFSPlusFolderRecord)
                encoding = crp->hfsPlusFolder.textEncoding;
        else if (crp->recordType == kHFSPlusFileRecord)
                encoding = crp->hfsPlusFile.textEncoding;
        else
                encoding = 0;

        return (encoding);
}

/*
 * Extract the CNID from a catalog node record.
 */
static cnid_t 
getcnid(const CatalogRecord *crp)
{
        cnid_t cnid = 0;

        switch (crp->recordType) {
        case kHFSFolderRecord:
                cnid = crp->hfsFolder.folderID;
                break;
        case kHFSFileRecord:
                cnid = crp->hfsFile.fileID;
                break;
        case kHFSPlusFolderRecord:
                cnid = crp->hfsPlusFolder.folderID;
                break;
        case kHFSPlusFileRecord:
                cnid = crp->hfsPlusFile.fileID;
                break;
        default:
                printf("hfs: getcnid: unknown recordType (crp @ 0x%x)\n", crp);
                break;
        }

        return (cnid);
}

/*
 * Extract the parent ID from a catalog node record.
 */
static cnid_t 
getparentcnid(const CatalogRecord *recp)
{
        cnid_t cnid = 0;

        switch (recp->recordType) {
        case kHFSFileThreadRecord:
        case kHFSFolderThreadRecord:
                cnid = recp->hfsThread.parentID;
                break;

        case kHFSPlusFileThreadRecord:
        case kHFSPlusFolderThreadRecord:
                cnid = recp->hfsPlusThread.parentID;
                break;
        default:
                panic("hfs: getparentcnid: unknown recordType (crp @ 0x%x)\n", recp);
                break;
        }

        return (cnid);
}

/*
 * Determine if a catalog node record is a directory.
 */
static int 
isadir(const CatalogRecord *crp)
{
        return (crp->recordType == kHFSFolderRecord ||
                crp->recordType == kHFSPlusFolderRecord);
}