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fsw_hfs.c
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fsw_hfs.c
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/* $Id: fsw_hfs.c $ */
/** @file
* fsw_hfs.c - HFS file system driver code, see
*
* http://developer.apple.com/technotes/tn/tn1150.html
*
* Current limitations:
* - Doesn't support permissions
* - Complete Unicode case-insensitiveness disabled (large tables)
* - No links
* - Only supports pure HFS+ (i.e. no HFS, or HFS+ embedded to HFS)
*/
/*
* Copyright (C) 2010 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#include "fsw_hfs.h"
#ifdef HOST_POSIX
#define DPRINT(x) printf(x)
#define DPRINT2(x,y) printf(x,y)
#endif
#ifdef HOST_MSWIN
#define DPRINT(x) printf(x)
#define DPRINT2(x,y) printf(x,y)
#endif
#ifndef DPRINT
#define CONCAT(x,y) x##y
#define DPRINT(x) Print(CONCAT(L,x))
#define DPRINT2(x,y) Print(CONCAT(L,x), y)
#endif
/*
* Handy type to deal with memory holding btnode datum
*/
typedef struct {
BTNodeDescriptor ndesc;
fsw_u16 shorts[1];
} btnode_datum_t;
typedef struct {
fsw_u32 id;
fsw_dnode_kind_t kind;
struct fsw_string name;
fsw_u32 creator;
fsw_u32 crtype;
fsw_u32 ilink;
fsw_u64 size;
fsw_u64 used;
fsw_u32 ctime;
fsw_u32 mtime;
HFSPlusExtentRecord extents;
} file_info_t;
// functions
static fsw_status_t fsw_hfs_unistr_be2string (
struct fsw_string* fs,
fsw_string_kind_t fskind,
HFSUniStr255* us
);
static fsw_status_t fsw_hfs_string2unistr (
HFSUniStr255* us,
struct fsw_string* fs
);
static fsw_status_t fsw_hfs_volume_mount (
struct fsw_hfs_volume *vol
);
static void fsw_hfs_volume_free (
struct fsw_hfs_volume *vol
);
static fsw_status_t fsw_hfs_volume_stat (
struct fsw_hfs_volume *vol,
struct fsw_volume_stat *sb
);
static fsw_status_t fsw_hfs_dnode_fill (
struct fsw_hfs_volume *vol,
struct fsw_hfs_dnode *dno
);
static void fsw_hfs_dnode_free (
struct fsw_hfs_volume *vol,
struct fsw_hfs_dnode *dno
);
static fsw_status_t fsw_hfs_dnode_stat (
struct fsw_hfs_volume *vol,
struct fsw_hfs_dnode *dno,
struct fsw_dnode_stat *sb
);
static fsw_status_t fsw_hfs_get_extent (
struct fsw_hfs_volume *vol,
struct fsw_hfs_dnode *dno,
struct fsw_extent *extent
);
static fsw_status_t fsw_hfs_dir_lookup (
struct fsw_hfs_volume *vol,
struct fsw_hfs_dnode *dno,
struct fsw_string *lookup_name,
struct fsw_hfs_dnode **child_dno_out
);
static fsw_status_t fsw_hfs_dir_read (
struct fsw_hfs_volume *vol,
struct fsw_hfs_dnode *dno,
struct fsw_shandle *shand,
struct fsw_hfs_dnode **child_dno_out
);
static fsw_status_t fsw_hfs_readlink (
struct fsw_hfs_volume *vol,
struct fsw_hfs_dnode *dno,
struct fsw_string *link_target
);
static fsw_status_t fsw_hfs_btree_read_node (
struct fsw_hfs_btree *btree,
fsw_u32 nodenum,
btnode_datum_t** outbuf
);
static BTreeKey *fsw_hfs_btnode_key (
struct fsw_hfs_btree *btree,
btnode_datum_t* node,
fsw_u32 tuplenum
);
static void * fsw_hfs_btnode_record_ptr (
BTreeKey *currkey
);
static fsw_status_t fsw_hfs_dnode_readinfo (
struct fsw_hfs_volume *vol,
struct fsw_hfs_dnode *dno
);
static int fsw_hfs_cmpb_catkey (
BTreeKey *btkey1,
BTreeKey *btkey2
);
static int fsw_hfs_cmpf_catkey (
BTreeKey *btkey1,
BTreeKey *btkey2
);
static int fsw_hfs_cmpt_catkey (
BTreeKey *btkey1,
BTreeKey *btkey2
);
fsw_u32 fsw_hfs_vol_bless_id (
struct fsw_hfs_volume *vol,
fsw_hfs_bless_kind_t bkind
);
static fsw_status_t fsw_hfs_btree_search (
struct fsw_hfs_btree *btree,
BTreeKey *key,
int (*compare_keys) (BTreeKey *key1, BTreeKey *key2),
btnode_datum_t **btnode_out,
fsw_u32 *tuplenum_out
);
static void hfs_dnode_stuff_info (
struct fsw_hfs_dnode *dno,
file_info_t *file_info
);
//
// Dispatch Table
//
struct fsw_fstype_table FSW_FSTYPE_TABLE_NAME (
hfs
) = {
{ FSW_STRING_KIND_ISO88591, 4, 4, "hfs"},
sizeof (struct fsw_hfs_volume),
sizeof (struct fsw_hfs_dnode),
fsw_hfs_volume_mount,
fsw_hfs_volume_free,
fsw_hfs_volume_stat,
fsw_hfs_dnode_fill,
fsw_hfs_dnode_free,
fsw_hfs_dnode_stat,
fsw_hfs_get_extent,
fsw_hfs_dir_lookup,
fsw_hfs_dir_read,
fsw_hfs_readlink
};
static fsw_status_t
fsw_hfs_unistr_be2string(struct fsw_string* fs, fsw_string_kind_t fskind, HFSUniStr255* us)
{
fsw_u16 uslen;
struct fsw_string ws;
uslen = be16_to_cpu(us->length);
fsw_string_setter(&ws, FSW_STRING_KIND_UTF16_BE, uslen, sizeof(fsw_u16) * uslen, us->unicode);
return fsw_strdup_coerce(fs, fskind, &ws);
}
static fsw_status_t
fsw_hfs_string2unistr(HFSUniStr255* us, struct fsw_string* fs)
{
fsw_status_t status;
struct fsw_string ws;
fsw_string_setter(&ws, FSW_STRING_KIND_EMPTY, 0, 0, NULL);
status = fsw_strdup_coerce(&ws, FSW_STRING_KIND_UTF16, fs);
if (status == FSW_SUCCESS) {
if ((us->length = (fsw_u16) fsw_strlen(&ws)) > 0)
fsw_memcpy(us->unicode, fsw_strchars(&ws), fsw_strsize(&ws));
}
fsw_string_mkempty (&ws); /* Free memory used for chars */
return status;
}
static HFSPlusCatalogKey *
fsw_hfs_make_catkey(fsw_u32 pid, struct fsw_string *str) {
fsw_status_t sts = FSW_SUCCESS;
fsw_u16 cklen;
HFSPlusCatalogKey *ck = NULL;
cklen = sizeof (ck->parentID) + sizeof (ck->nodeName.length);
cklen += (fsw_u16) (fsw_strlen(str) * sizeof (ck->nodeName.unicode[0]));
sts = fsw_alloc_zero(cklen + sizeof (ck->keyLength), (void **) &ck);
if (sts == FSW_SUCCESS) {
sts = fsw_hfs_string2unistr(&ck->nodeName, str);
if (sts != FSW_SUCCESS) {
fsw_free(ck);
ck = NULL;
} else {
ck->keyLength = cklen;
ck->parentID = pid;
}
}
return ck;
}
static fsw_s32
fsw_hfs_read_block (struct fsw_hfs_dnode *dno, fsw_u32 log_bno, fsw_u32 off, fsw_s32 len, fsw_u8 *buf)
{
fsw_status_t status;
struct fsw_extent extent;
fsw_u8 *buffer;
fsw_memzero(&extent, sizeof(extent));
extent.log_start = log_bno;
status = fsw_hfs_get_extent (dno->g.vol, dno, &extent);
if (status == FSW_SUCCESS) {
fsw_u32 phys_bno;
phys_bno = extent.phys_start;
status = fsw_block_get (dno->g.vol, phys_bno, 0, (void **) &buffer);
if (status == FSW_SUCCESS) {
fsw_memcpy (buf, buffer + off, len);
fsw_block_release (dno->g.vol, phys_bno, buffer);
}
}
return status;
}
/* Read data from HFS file. */
static fsw_s32
fsw_hfs_read_file (struct fsw_hfs_dnode *dno, fsw_u64 pos, fsw_s32 len, fsw_u8 *buf)
{
fsw_status_t status;
fsw_s32 read = 0;
fsw_u32 block_size_bits = dno->g.vol->block_size_shift;
fsw_u32 block_size = (1 << block_size_bits);
fsw_u32 block_size_mask = block_size - 1;
while (len > 0) {
fsw_u32 log_bno;
fsw_u32 off = (fsw_u32) (pos & block_size_mask);
fsw_s32 next_len = len;
log_bno = (fsw_u32) FSW_U64_SHR (pos, block_size_bits);
if (next_len >= 0 && (fsw_u32) next_len > block_size)
next_len = block_size;
status = fsw_hfs_read_block (dno, log_bno, off, next_len, buf);
if (status != FSW_SUCCESS)
return -1;
buf += next_len;
pos += next_len;
len -= next_len;
read += next_len;
}
return read;
}
static fsw_s32
fsw_hfs_compute_shift (fsw_u32 size)
{
fsw_s32 i;
for (i = 0; i < 32; i++) {
if ((size >> i) == 0)
return i - 1;
}
return 0;
}
static BTHeaderRec *
fsw_hfs_btree_read_hdrec (struct fsw_hfs_btree* btree)
{
fsw_status_t status;
BTHeaderRec* hr = NULL;
status = fsw_alloc(sizeof (BTHeaderRec), &hr);
if (status == FSW_SUCCESS) {
fsw_s32 rv;
rv = fsw_hfs_read_file (btree->btfile, sizeof (BTNodeDescriptor), sizeof (BTHeaderRec), (fsw_u8 *) hr);
if (rv != sizeof (BTHeaderRec)) {
fsw_free(hr);
hr = NULL;
}
}
return hr;
}
static fsw_status_t
fsw_hfs_volume_btree_setup ( struct fsw_hfs_btree* btree)
{
BTHeaderRec* hr;
hr = fsw_hfs_btree_read_hdrec(btree);
if (hr != NULL) {
btree->btroot_node = be32_to_cpu (hr->rootNode);
btree->btnode_size = be16_to_cpu (hr->nodeSize);
fsw_free(hr);
return FSW_SUCCESS;
}
return FSW_VOLUME_CORRUPTED;
}
static HFSPlusCatalogThread *
fsw_hfs_cnid2threadrecord (struct fsw_hfs_volume *vol, fsw_u32 cnid, btnode_datum_t **btnode)
{
fsw_status_t status;
fsw_u32 tuplenum;
HFSPlusCatalogKey *catkey;
HFSPlusCatalogThread *trp = NULL;
catkey = fsw_hfs_make_catkey(cnid, NULL);
if (catkey != NULL) {
status = fsw_hfs_btree_search (&vol->catalog_tree, (BTreeKey *) catkey, fsw_hfs_cmpt_catkey, btnode, &tuplenum);
if (status == FSW_SUCCESS) {
trp = (HFSPlusCatalogThread *) fsw_hfs_btnode_record_ptr (fsw_hfs_btnode_key (&vol->catalog_tree, *btnode, tuplenum));
}
}
fsw_free(catkey);
return trp;
}
static fsw_status_t
fsw_hfs_volume_catalog_setup (struct fsw_hfs_volume *vol)
{
fsw_status_t status;
BTHeaderRec* hr;
btnode_datum_t *btnode = NULL;
HFSPlusCatalogThread *trp = NULL;
hr = fsw_hfs_btree_read_hdrec(&vol->catalog_tree);
if (hr != NULL) {
vol->btkey_compare = hr->keyCompareType == kHFSBinaryCompare ? fsw_hfs_cmpb_catkey : fsw_hfs_cmpf_catkey;
fsw_free(hr);
} else {
return FSW_VOLUME_CORRUPTED;
}
/* Set default volume name */
fsw_string_setter (&vol->g.label, FSW_STRING_KIND_EMPTY, 0, 0, NULL);
/*
* Volume label lives in thread record for kHFSRootFolderID (root folder is nameless by design)
*/
status = FSW_VOLUME_CORRUPTED;
trp = fsw_hfs_cnid2threadrecord(vol, kHFSRootFolderID, &btnode);
if (trp != NULL)
status = fsw_hfs_unistr_be2string(&vol->g.label, vol->g.host_string_kind, &trp->nodeName);
fsw_free(btnode);
return status;
}
/**
* Mount an HFS+ volume. Reads the superblock and constructs the
* root directory dnode.
*/
static fsw_status_t
fsw_hfs_volume_mount (struct fsw_hfs_volume *vol)
{
fsw_status_t status, rv;
void *buffer = NULL;
fsw_u32 blockno;
vol->primary_voldesc = NULL;
fsw_set_blocksize (vol, HFS_BLOCKSIZE, HFS_BLOCKSIZE);
blockno = HFS_SUPERBLOCK_BLOCKNO;
#define CHECK(sx) if (sx != FSW_SUCCESS) { rv = sx; break; }
do {
HFSPlusVolumeHeader *voldesc;
fsw_u32 block_size;
fsw_u16 signature;
status = fsw_block_get (vol, blockno, 0, &buffer);
CHECK (status);
voldesc = (HFSPlusVolumeHeader *) buffer;
signature = be16_to_cpu (voldesc->signature);
if ((signature != kHFSPlusSigWord) && (signature != kHFSXSigWord)) {
rv = FSW_UNSUPPORTED;
break;
}
status = fsw_memdup ((void **) &vol->primary_voldesc, voldesc, sizeof (*voldesc));
CHECK (status);
block_size = be32_to_cpu (voldesc->blockSize);
vol->block_size_shift = fsw_hfs_compute_shift (block_size);
fsw_block_release (vol, blockno, buffer);
buffer = NULL;
voldesc = NULL;
fsw_set_blocksize (vol, block_size, block_size);
fsw_memcpy (&vol->fndr_info, &vol->primary_voldesc->finderInfo, sizeof (vol->fndr_info));
/* Setup catalog dnode */
status = fsw_dnode_create_root (vol, kHFSCatalogFileID, &vol->catalog_tree.btfile);
CHECK (status);
fsw_memcpy (vol->catalog_tree.btfile->extents,
vol->primary_voldesc->catalogFile.extents,
sizeof (vol->catalog_tree.btfile->extents));
vol->catalog_tree.btfile->g.size =
be64_to_cpu (vol->primary_voldesc->catalogFile.logicalSize);
/* Setup extents overflow file */
status = fsw_dnode_create_root (vol, kHFSExtentsFileID, &vol->extents_tree.btfile);
CHECK (status);
fsw_memcpy (vol->extents_tree.btfile->extents,
vol->primary_voldesc->extentsFile.extents,
sizeof (vol->extents_tree.btfile->extents));
vol->extents_tree.btfile->g.size =
be64_to_cpu (vol->primary_voldesc->extentsFile.logicalSize);
/* Setup the root dnode */
status = fsw_dnode_create_root (vol, kHFSRootFolderID, &vol->g.root);
CHECK (status);
status = fsw_hfs_volume_btree_setup (&vol->catalog_tree);
CHECK (status);
/* Setup extents overflow file */
status = fsw_hfs_volume_btree_setup (&vol->extents_tree);
CHECK(status);
rv = fsw_hfs_volume_catalog_setup (vol);
} while (0);
#undef CHECK
if (buffer != NULL)
fsw_block_release (vol, blockno, buffer);
return rv;
}
/**
* Free the volume data structure. Called by the core after an unmount or after
* an unsuccessful mount to release the memory used by the file system type specific
* part of the volume structure.
*/
static void
fsw_hfs_volume_free (struct fsw_hfs_volume *vol)
{
if (vol->primary_voldesc != NULL) {
fsw_free (vol->primary_voldesc);
vol->primary_voldesc = NULL;
}
if (vol->catalog_tree.btfile != NULL) {
fsw_dnode_release ((struct fsw_dnode *) (vol->catalog_tree.btfile));
vol->catalog_tree.btfile = NULL;
}
if (vol->extents_tree.btfile != NULL) {
fsw_dnode_release ((struct fsw_dnode *) (vol->extents_tree.btfile));
vol->extents_tree.btfile = NULL;
}
}
/**
* Get in-depth information on a volume.
*/
static fsw_status_t
fsw_hfs_volume_stat (struct fsw_hfs_volume *vol, struct fsw_volume_stat *sb)
{
sb->total_bytes =
FSW_U64_SHL (be32_to_cpu (vol->primary_voldesc->totalBlocks),
vol->block_size_shift);
sb->free_bytes =
FSW_U64_SHL (be32_to_cpu (vol->primary_voldesc->freeBlocks),
vol->block_size_shift);
return FSW_SUCCESS;
}
/*
* Get blessed item ID
*/
fsw_u32
fsw_hfs_vol_bless_id (struct fsw_hfs_volume *vol, fsw_hfs_bless_kind_t bkind) {
fsw_u32 bnid = 0;
if ((int) bkind < 6)
bnid = vol->fndr_info[bkind];
return be32_to_cpu(bnid);
}
/**
* Get full information on a dnode from disk. This function is called by the core
* whenever it needs to access fields in the dnode structure that may not
* be filled immediately upon creation of the dnode.
*/
static fsw_status_t
fsw_hfs_dnode_fill (struct fsw_hfs_volume *vol, struct fsw_hfs_dnode *dno)
{
fsw_status_t status = FSW_UNKNOWN_ERROR;
if (dno->g.fullinfo)
return FSW_SUCCESS;
status = fsw_hfs_dnode_readinfo(vol, dno);
return status;
}
/**
* Free the dnode data structure. Called by the core when deallocating a dnode
* structure to release the memory used by the file system type specific part
* of the dnode structure.
*/
static void
fsw_hfs_dnode_free (struct fsw_hfs_volume *vol, struct fsw_hfs_dnode *dno)
{
}
static fsw_u32
mac_to_posix (fsw_u32 mac_time)
{
/* Mac time is 1904 year based */
return mac_time ? mac_time - 2082844800 : 0;
}
/**
* Get in-depth information on a dnode. The core makes sure that fsw_hfs_dnode_fill
* has been called on the dnode before this function is called. Note that some
* data is not directly stored into the structure, but passed to a host-specific
* callback that converts it to the host-specific format.
*/
static fsw_status_t
fsw_hfs_dnode_stat (struct fsw_hfs_volume *vol, struct fsw_hfs_dnode *dno, struct fsw_dnode_stat *sb)
{
sb->used_bytes = dno->used_bytes;
sb->store_time_posix (sb, FSW_DNODE_STAT_CTIME, mac_to_posix (dno->ctime));
sb->store_time_posix (sb, FSW_DNODE_STAT_MTIME, mac_to_posix (dno->mtime));
sb->store_time_posix (sb, FSW_DNODE_STAT_ATIME, 0);
sb->store_attr_posix (sb, 0700);
return FSW_SUCCESS;
}
static int
fsw_hfs_find_block (HFSPlusExtentRecord *exts, fsw_u32 *lbno, fsw_u32 *pbno)
{
int i;
fsw_u32 cur_lbno = *lbno;
for (i = 0; i < 8; i++) {
fsw_u32 start = be32_to_cpu ((*exts)[i].startBlock);
fsw_u32 count = be32_to_cpu ((*exts)[i].blockCount);
if (cur_lbno < count) {
*pbno = start + cur_lbno;
return 1;
}
cur_lbno -= count;
}
*lbno = cur_lbno;
return 0;
}
/* Find in btnode key offset for given tuple (key, record) number */
static fsw_u32
fsw_hfs_btnode_keyoffset (struct fsw_hfs_btree *btree, btnode_datum_t *btnode, fsw_u32 tuplenum)
{
fsw_u16 koff = 0;
fsw_u16 count;
count = be16_to_cpu (btnode->ndesc.numRecords);
if (count > 0 && tuplenum < count) {
fsw_u32 ix;
ix = ((btree->btnode_size - sizeof (BTNodeDescriptor)) / sizeof (fsw_u16)) - 1 - tuplenum;
koff = be16_to_cpu(btnode->shorts[ix]);
}
return koff;
}
/* Pointer to the key inside btnode for given tuple (key, record) number */
static BTreeKey *
fsw_hfs_btnode_key (struct fsw_hfs_btree *btree, btnode_datum_t* btnode, fsw_u32 tuplenum)
{
fsw_u8 *cnode = (fsw_u8 *) btnode;
fsw_u32 offset;
offset = fsw_hfs_btnode_keyoffset (btree, btnode, tuplenum);
if (offset < sizeof(BTNodeDescriptor) || offset > btree->btnode_size - sizeof (fsw_u16)) {
return NULL;
}
return (BTreeKey *) (cnode + offset);
}
static void *
fsw_hfs_btnode_record_ptr (BTreeKey *currkey)
{
fsw_u8 *ptr;
ptr = ((fsw_u8 *) currkey + be16_to_cpu (currkey->length16) + sizeof (currkey->length16));
return (void *) ptr;
}
static fsw_status_t
fsw_hfs_btree_read_node (struct fsw_hfs_btree *btree, fsw_u32 nodenum, btnode_datum_t** outnode)
{
fsw_status_t status;
btnode_datum_t* btnode;
status = fsw_alloc (btree->btnode_size, &btnode);
if (status == FSW_SUCCESS) {
fsw_u64 bstart;
fsw_s32 rv;
status = FSW_VOLUME_CORRUPTED;
bstart = (fsw_u64) nodenum * btree->btnode_size;
fsw_memzero (btnode, btree->btnode_size);
rv = fsw_hfs_read_file(btree->btfile, bstart, btree->btnode_size, (fsw_u8 *) btnode);
if ((fsw_u32) rv == btree->btnode_size) {
fsw_u32 roffset = fsw_hfs_btnode_keyoffset(btree, btnode, 0);
if (roffset == sizeof (BTNodeDescriptor)) {
*outnode = btnode;
status = FSW_SUCCESS;
}
}
}
if (status != FSW_SUCCESS)
fsw_free(btnode);
return status;
}
static fsw_u32
fsw_hfs_btree_ix_next_btnodenum (BTreeKey *btkey)
{
fsw_u32 nn;
nn = *((fsw_u32 *)fsw_hfs_btnode_record_ptr (btkey));
return be32_to_cpu(nn);
}
static fsw_status_t
fsw_hfs_btree_search (struct fsw_hfs_btree *btree, BTreeKey *key, int (*compare_keys) (BTreeKey *key1, BTreeKey *key2), btnode_datum_t **btnode_out, fsw_u32 *tuplenum_out)
{
fsw_status_t status;
btnode_datum_t *btnode = NULL;
fsw_u32 btnodenum;
fsw_u32 tuplenum;
btnodenum = btree->btroot_node;
for (;;) {
fsw_s32 cmp = 0;
fsw_u32 count;
BTreeKey *currkey = NULL;
status = fsw_hfs_btree_read_node (btree, btnodenum, &btnode);
if (status != FSW_SUCCESS)
break;
count = be16_to_cpu (btnode->ndesc.numRecords);
for (tuplenum = 0; tuplenum < count; tuplenum++) {
currkey = fsw_hfs_btnode_key (btree, btnode, tuplenum);
cmp = compare_keys (currkey, key);
if (cmp <= 0 && btnode->ndesc.kind == kBTIndexNode) {
btnodenum = fsw_hfs_btree_ix_next_btnodenum (currkey);
}
if (cmp >= 0)
break;
}
if (btnode->ndesc.kind == kBTLeafNode) {
status = FSW_NOT_FOUND;
if (cmp == 0) {
*btnode_out = btnode;
*tuplenum_out = tuplenum;
status = FSW_SUCCESS;
}
break;
}
if (tuplenum == 0 && cmp > 0) {
status = FSW_NOT_FOUND;
break;
}
fsw_free(btnode);
btnode = NULL;
}
if (status != FSW_SUCCESS)
fsw_free (btnode);
return status;
}
static void
fill_fileinfo (struct fsw_hfs_volume* vol, BTreeKey* btkey, file_info_t* finfo)
{
fsw_u8* base;
fsw_u16 rec_type;
base = (fsw_u8 *) fsw_hfs_btnode_record_ptr (btkey);
rec_type = be16_to_cpu (*(fsw_u16 *) base);
/** @todo: read additional info */
switch (rec_type) {
case kHFSPlusFolderRecord:
{
HFSPlusCatalogFolder *info = (HFSPlusCatalogFolder *) (void *)base;
finfo->kind = FSW_DNODE_KIND_DIR;
finfo->id = be32_to_cpu (info->folderID);
/* @todo: return number of elements, maybe use smth else */
finfo->size = be32_to_cpu (info->valence);
finfo->used = be32_to_cpu (info->valence);
finfo->ctime = be32_to_cpu (info->createDate);
finfo->mtime = be32_to_cpu (info->contentModDate);
break;
}
case kHFSPlusFileRecord:
{
HFSPlusCatalogFile *info = (HFSPlusCatalogFile *) (void *)base;
finfo->kind = FSW_DNODE_KIND_FILE;
finfo->id = be32_to_cpu (info->fileID);
finfo->creator = be32_to_cpu (info->userInfo.fdCreator);
finfo->crtype = be32_to_cpu (info->userInfo.fdType);
/* Is the file any kind of link? */
if ((finfo->creator == kSymLinkCreator && finfo->crtype == kSymLinkFileType) ||
(finfo->creator == kHFSPlusCreator && finfo->crtype == kHardLinkFileType)) {
finfo->kind = FSW_DNODE_KIND_SYMLINK;
finfo->ilink = be32_to_cpu (info->bsdInfo.special.iNodeNum);
}
finfo->size = be64_to_cpu (info->dataFork.logicalSize);
finfo->used = FSW_U64_SHL (be32_to_cpu (info->dataFork.totalBlocks), vol->block_size_shift);
finfo->ctime = be32_to_cpu (info->createDate);
finfo->mtime = be32_to_cpu (info->contentModDate);
fsw_memcpy (&finfo->extents, &info->dataFork.extents, sizeof (finfo->extents));
break;
}
default:
finfo->kind = FSW_DNODE_KIND_UNKNOWN;
break;
}
}
typedef struct {
fsw_u32 cur_pos; /* current position */
fsw_u32 parent;
struct fsw_hfs_volume *vol;
struct fsw_shandle *shandle; /* this one track iterator's state */
file_info_t file_info;
} visitor_parameter_t;
static int
fsw_hfs_btnode_visit_record (BTreeKey *btkey, void *param)
{
visitor_parameter_t *vp = (visitor_parameter_t *) param;
struct HFSPlusCatalogKey *cat_key = (HFSPlusCatalogKey *) btkey;
fsw_u8 *base = (fsw_u8 *) fsw_hfs_btnode_record_ptr (btkey);
fsw_u16 rec_type = be16_to_cpu (*(fsw_u16 *) base);
if (be32_to_cpu (cat_key->parentID) != vp->parent)
return -1;
vp->file_info.kind = FSW_DNODE_KIND_UNKNOWN;
if (vp->shandle->pos != vp->cur_pos++)
return 0;
switch (rec_type) {
case kHFSPlusFolderThreadRecord:
case kHFSPlusFileThreadRecord:
vp->shandle->pos++; /* not smth we care about, skip it */
return 0;
default:
break;
}
fill_fileinfo (vp->vol, btkey, &vp->file_info);
(void) fsw_hfs_unistr_be2string(&vp->file_info.name, FSW_STRING_KIND_UTF16, &cat_key->nodeName); /* XXX: (void)? */
vp->shandle->pos++;
return 1;
}
static fsw_status_t
fsw_hfs_btnode_iterate_records (struct fsw_hfs_btree *btree, btnode_datum_t *first_btnode, fsw_u32 first_tuplenum, int (*callback) (BTreeKey *record, void *param), void *param)
{
fsw_status_t status;
/* We modify node, so make a copy */
btnode_datum_t *btnode = first_btnode;
for (;;) {
fsw_u32 i;
fsw_u32 next_btnode;
fsw_u32 count = be16_to_cpu (btnode->ndesc.numRecords);
/* Iterate over all records in this node */
for (i = first_tuplenum; i < count; i++) {
int rv = callback (fsw_hfs_btnode_key (btree, btnode, i), param);
switch (rv) {
case 1:
status = FSW_SUCCESS;
goto done;
case -1:
status = FSW_NOT_FOUND;
goto done;
}
/* if callback returned 0 - continue */
}
next_btnode = be32_to_cpu (btnode->ndesc.fLink);
if (next_btnode == 0) {
status = FSW_NOT_FOUND;
break;
}
fsw_free(btnode);
btnode = NULL;
status = fsw_hfs_btree_read_node (btree, next_btnode, &btnode);
if (status != FSW_SUCCESS)
break;
first_tuplenum = 0;
}
done:
fsw_free(btnode);
return status;
}
static int
fsw_hfs_cmp_extkey (BTreeKey *key1, BTreeKey *key2)
{
HFSPlusExtentKey *ekey1 = (HFSPlusExtentKey *) key1;
HFSPlusExtentKey *ekey2 = (HFSPlusExtentKey *) key2;
int result;
/* First key is read from the FS data, second is in-memory in CPU endianess */
result = be32_to_cpu (ekey1->fileID) - ekey2->fileID;
if (result)
return result;
result = ekey1->forkType - ekey2->forkType;
if (result)
return result;
result = be32_to_cpu (ekey1->startBlock) - ekey2->startBlock;
return result;
}
/* Thread key search */
static int
fsw_hfs_cmpt_catkey (BTreeKey *btkey1, BTreeKey *btkey2)
{
HFSPlusCatalogKey *ckey1 = (HFSPlusCatalogKey *) btkey1;
HFSPlusCatalogKey *ckey2 = (HFSPlusCatalogKey *) btkey2;
int rv;