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Diffstat (limited to 'qemu/roms/openbios/fs/grubfs/fsys_ntfs.c')
-rw-r--r--qemu/roms/openbios/fs/grubfs/fsys_ntfs.c1255
1 files changed, 0 insertions, 1255 deletions
diff --git a/qemu/roms/openbios/fs/grubfs/fsys_ntfs.c b/qemu/roms/openbios/fs/grubfs/fsys_ntfs.c
deleted file mode 100644
index a244f5c6b..000000000
--- a/qemu/roms/openbios/fs/grubfs/fsys_ntfs.c
+++ /dev/null
@@ -1,1255 +0,0 @@
-/* vim: set sw=4 :*/
-/*
- * GRUB -- GRand Unified Bootloader
- * Copyright (C) 1999 Free Software Foundation, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
- * MA 02110-1301, USA.
- */
-
-/*
- * Samuel Leo <samuel@_.remove.me._szonline.net>
- * Limitations:
- * 1. Only 32 bit size support
- * 2. don't support >1k MFT record size, >16k INDEX record size
- * 3. don't support recursive at_attribute_list
- * 4. don't support compressed attribute other than Datastream
- * 5. all MFT's at_attribute_list must resident at first run list
- * 6. don't support journaling
- * 7. don't support EFS encryption
- * 8. don't support mount point and junction
- */
-#ifdef FSYS_NTFS
-
-//#define DEBUG_NTFS 1
-
-/*
-#define NO_ATTRIBUTE_LIST 1
- totally disable at_attribute_list support,
- if no compressed/fragment file and MFT,
- not recommended
-#define NO_NON_RESIDENT_ATTRIBUTE_LIST 1
- disable non-resident at_attribute_list support,
- if no huge compressed/fragment file and MFT
-#define NO_NTFS_DECOMPRESSION 1
- disable ntfs compressed file support
-#define NO_ALTERNATE_DATASTREAM 1
- disable ntfs alternate datastream support
-*/
-
-#include "shared.h"
-#include "filesys.h"
-
-#ifdef STAGE1_5
-/* safe turn off non-resident attribute list if MFT fragments < 4000 */
-//#define NO_NON_RESIDENT_ATTRIBUTE_LIST 1
-#define NO_NTFS_DECOMPRESSION 1
-#endif
-
-#define MAX_MFT_RECORD_SIZE 1024
-#define MAX_INDEX_RECORD_SIZE 16384
-#define MAX_INDEX_BITMAP_SIZE 4096
-#define DECOMP_DEST_BUFFER_SIZE 16384
-#define DECOMP_SOURCE_BUFFER_SIZE (8192+2)
-#define MAX_DIR_DEPTH 64
-
-/* sizes are always in bytes, BLOCK values are always in DEV_BSIZE (sectors) */
-#define DEV_BSIZE 512
-
-/* include/linux/fs.h */
-#define BLOCK_SIZE 512
-
-#define WHICH_SUPER 1
-#define SBLOCK (WHICH_SUPER * BLOCK_SIZE / DEV_BSIZE) /* = 2 */
-
-/* include/asm-i386/type.h */
-typedef __signed__ char __s8;
-typedef unsigned char __u8;
-typedef __signed__ short __s16;
-typedef unsigned short __u16;
-typedef __signed__ int __s32;
-typedef unsigned int __u32;
-typedef __signed__ long long __s64;
-typedef unsigned long long __u64;
-
-#define FILE_MFT 0
-#define FILE_MFTMIRR 1
-#define FILE_LOGFILE 2
-#define FILE_VOLUME 3
-#define FILE_ATTRDEF 4
-#define FILE_ROOT 5
-#define FILE_BITMAP 6
-#define FILE_BOOT 7
-#define FILE_BADCLUS 8
-#define FILE_QUOTA 9
-#define FILE_UPCASE 10
-
-#define at_standard_information 0x10
-#define at_attribute_list 0x20
-#define at_filename 0x30
-#define at_security_descriptor 0x50
-#define at_data 0x80
-#define at_index_root 0x90
-#define at_index_allocation 0xa0
-#define at_bitmap 0xb0
-#define at_symlink 0xc0
-
-#define NONAME ""
-#define ATTR_NORMAL 0
-#define ATTR_COMPRESSED 1
-#define ATTR_RESIDENT 2
-#define ATTR_ENCRYPTED 16384
-#define ATTR_SPARSE 32768
-
-typedef struct run_list {
- char *start;
- char *ptr;
- int svcn;
- int evcn;
- int vcn;
- int cnum0;
- int cnum;
- int clen;
-} RUNL;
-
-typedef struct ntfs_mft_record {
- char mft[MAX_MFT_RECORD_SIZE];
- char mft2[MAX_MFT_RECORD_SIZE];
- int attr_type;
- char *attr_name;
- int attr_flag;
- int attr_size;
- char *attr;
- int attr_len;
- RUNL runl;
- char *attr_list;
- int attr_list_len;
- int attr_list_size;
- int attr_list_off;
- int attr_inited;
- char attr_list_buf[2*BLOCK_SIZE];
- RUNL attr_list_runl;
-} MFTR;
-
-
-#define index_data ((char *)FSYS_BUF)
-#define bitmap_data ((__u8 *)(FSYS_BUF+MAX_INDEX_RECORD_SIZE))
-#define dcdbuf ((__u8 *)index_data)
-#define dcsbuf (bitmap_data)
-#define dcend (dcsbuf+DECOMP_SOURCE_BUFFER_SIZE)
-#define fnbuf ((char *)(bitmap_data+MAX_INDEX_BITMAP_SIZE))
-#define mmft ((MFTR *)dcend)
-#define cmft ((MFTR *)(dcend+sizeof(MFTR)))
-#define mft_run ((RUNL *)(dcend+2*sizeof(MFTR)))
-#define path_ino ((int *)(dcend+2*sizeof(MFTR)+sizeof(RUNL)))
-#define cluster16 (path_ino+MAX_DIR_DEPTH)
-#define index16 cluster16[16]
-#define blocksize cluster16[17]
-#define clustersize cluster16[18]
-#define mft_record_size cluster16[19]
-#define index_record_size cluster16[20]
-#define dcvcn cluster16[21]
-#define dcoff cluster16[22]
-#define dclen cluster16[23]
-#define dcrem cluster16[24]
-#define dcslen cluster16[25]
-#define dcsptr ((__u8 *)cluster16[26])
-#define is_ads_completion cluster16[27]
-
-static int read_mft_record(int mftno, char *mft, int self);
-static int read_attribute(MFTR *mftr, int offset, char *buf, int len, RUNL *from_rl);
-static int get_next_run(RUNL *runl);
-
-static inline int
-nsubstring (char *s1, char *s2)
-{
- while (tolower(*s1) == tolower(*s2))
- {
- /* The strings match exactly. */
- if (! *(s1++))
- return 0;
- s2 ++;
- }
-
- /* S1 is a substring of S2. */
- if (*s1 == 0)
- return -1;
-
- /* S1 isn't a substring. */
- return 1;
-}
-
-static int fixup_record(char *record, char *magic, int size)
-{
- int start, count, offset;
- __u16 fixup;
-
- if(*(int *)record != *(int *)magic)
- return 0;
- start=*(__u16 *)(record+4);
- count=*(__u16 *)(record+6);
- count--;
- if(size && blocksize*count != size)
- return 0;
- fixup = *(__u16 *)(record+start);
- start+=2;
- offset=blocksize-2;
- while(count--){
- if(*(__u16 *)(record+offset)!=fixup)
- return 0;
- *(__u16 *)(record+offset) = *(__u16 *)(record+start);
- start+=2;
- offset+=blocksize;
- }
- return 1;
-}
-
-static void rewind_run_list( RUNL *runl) {
- runl->vcn = runl->svcn;
- runl->ptr = runl->start;
- runl->cnum0 = 0;
- runl->cnum = 0;
- runl->clen = 0;
-}
-
-static int get_next_run(RUNL *runl){
- int t, n, v;
-
-#ifdef DEBUG_NTFS
- printf("get_next_run: s=%d e=%d c=%d start=%x ptr=%x\n",
- runl->svcn, runl->evcn, runl->vcn, runl->start, runl->ptr);
-#endif
-
- runl->vcn += runl->clen;
- if(runl->vcn > runl->evcn) {
- return 0;
- }
-
- t = *(runl->ptr)++;
- n = t&0xf;
- runl->clen = 0; v = 1;
- while(n--) {
- runl->clen += v * *((__u8 *)runl->ptr)++;
- v <<= 8;
- }
- n = (t>>4)&0xf;
- if(n==0)
- runl->cnum = 0;
- else {
- int c = 0;
- v = 1;
- while(n--) {
- c += v * *((__u8 *)runl->ptr)++;
- v <<= 8;
- }
- if(c & (v>>1)) c -= v;
- runl->cnum0 += c;
- runl->cnum = runl->cnum0;
- }
-#ifdef DEBUG_NTFS
- printf("got_next_run: t=%x cluster %x len %x vcn=%x ecn=%x\n",
- t, runl->cnum, runl->clen, runl->vcn, runl->evcn);
-#endif
- return 1;
-}
-
-#ifndef NO_ATTRIBUTE_LIST
-static void init_run_list(char *attr, int len, RUNL *runl, __u32 *initp) {
- int allocated;
-
- runl->svcn = *(__u32 *)(attr+0x10); /* only support 32 bit */
- runl->evcn = *(__u32 *)(attr+0x18); /* only support 32 bit */
- runl->start = attr + *(__u16 *)(attr+0x20);
- allocated = *(__u32 *)(attr+0x28);
- if(initp) *initp = *(__u32 *)(attr+0x38);
- if(!runl->evcn) runl->evcn = (allocated - 1) / clustersize;
-#ifdef DEBUG_NTFS
- printf("size %d allocated=%d inited=%d cegin=%x csize=%d vcn=%d-%d\n",
- /*attr_size*/ *(__u32 *)(attr+0x30),
- /*allocated*/ *(__u32 *)(attr+0x28),
- /*attr_inited*/ *(__u32 *)(attr+0x38),
- /*cengin*/ *(__u16 *)(attr+0x22),
- /*csize*/ *(__u16 *)(attr+0x40),
- runl->svcn, runl->evcn);
-#endif
- rewind_run_list(runl);
-}
-#endif
-
-
-static int find_attribute(char *mft, int type, char *name, char **attr, int *size, int *len, int *flag) {
- int t, l, r, n, i, namelen;
- unsigned short *attr_name;
-
- n = strlen(name);
- r = mft_record_size - *(__u16 *)(mft+0x14);
- mft += *(__u16 *)(mft+0x14);
- while( (t = *(__s32 *)mft) != -1 ) {
- l = *(__u32 *)(mft+4);
- if(l>r) break;
-#ifdef DEBUG_NTFS
- printf("type = %x len = %d namelen=%d resident=%d compresed=%d attrno=%d\n",
- t, l,
- /*namelen*/ *(mft+9),
- //name = (__u16 *)(mft + *(__u16 *)(mft+10)),
- /*resident */ (*(mft+8) == 0),
- /*compressed*/ *(__u16 *)(mft+12),
- /*attrno*/ *(__u16 *)(mft+14));
-#endif
- namelen = *(mft+9);
- if(t == type) {
-#ifndef STAGE1_5
-#ifndef NO_ALTERNATE_DATASTREAM
- if(is_ads_completion && type == at_data) {
- if(namelen && namelen >= n &&
- (!*(mft+8)/*resident*/ || !*(__u32 *)(attr+0x10)/*svcn==0*/))
- {
- for(i=0, attr_name=(__u16 *)(mft + *(__u16 *)(mft+10)); i < n; i++)
- if(tolower(name[i]) != tolower(attr_name[i]))
- break;
- if(i >= n) {
- for(; i < namelen; i++)
- name[i] = attr_name[i];
- name[i] = '\0';
- if(print_possibilities > 0)
- print_possibilities = -print_possibilities;
- print_a_completion(fnbuf);
- name[n] = '\0';
- }
- }
- } else
-#endif
-#endif
- if(namelen == n) {
-
- for(i=0, attr_name=(__u16 *)(mft + *(__u16 *)(mft+10)); i<n; i++)
- if(tolower(name[i]) != tolower(attr_name[i]))
- break;
- if(i>=n) {
- if(flag) *flag = *(__u16 *)(mft+12);
- if(*(mft+8) == 0) {
- if(flag) *flag |= ATTR_RESIDENT;
-#ifdef DEBUG_NTFS
- printf("resident data at %x size %x indexed=%d\n",
- /*data*/ *(__u16 *)(mft+0x14),
- /*attr_size*/ *(__u16 *)(mft+0x10),
- /*indexed*/ *(__u16 *)(mft+0x16));
-#endif
- if(attr) *attr = mft + *(__u16 *)(mft+0x14);
- if(size) *size = *(__u16 *)(mft+0x10);
- if(len) *len = *(__u16 *)(mft+0x10);
- } else {
- if(attr) *attr = mft;
- if(size) *size = *(__u32 *)(mft+0x30);
- if(len) *len = l;
- }
- return 1;
- }
- }
- }
- mft += l;
- r -= l;
- }
- return 0;
-}
-
-#ifndef NO_ATTRIBUTE_LIST
-static __u32 get_next_attribute_list(MFTR *mftr, int *size) {
- int l, t, mftno;
-#ifdef DEBUG_NTFS
- printf("get_next_attribute_list: type=%x\n",mftr->attr_type);
-#endif
-again:
- while(mftr->attr_list_len>0x14) {
- t = *(__u32 *)(mftr->attr_list + 0);
- l = *(__u16 *)(mftr->attr_list + 4);
-#ifdef DEBUG_NTFS
- printf("attr_list type=%x len=%x remain=%x\n", t, l, mftr->attr_list_len);
-#endif
- if(l==0 || l>mftr->attr_list_len) return 0;
- mftno = *(__u32 *)(mftr->attr_list + 0x10);
- mftr->attr_list_len -= l;
- mftr->attr_list += l;
- if(t==mftr->attr_type)
- {
-#ifdef DEBUG_NTFS
- printf("attr_list mftno=%x\n", mftno);
-#endif
- if(read_mft_record(mftno, mftr->mft2, (mftr==mmft))==0)
- break;
- if(find_attribute(mftr->mft2, mftr->attr_type, mftr->attr_name,
- &mftr->attr, size, &mftr->attr_len, &mftr->attr_flag))
- return 1;
- }
- }
-#ifndef NO_NON_RESIDENT_ATTRIBUTE_LIST
- if(mftr->attr_list_off < mftr->attr_list_size) {
- int len = mftr->attr_list_size - mftr->attr_list_off;
- if(len > BLOCK_SIZE) len = BLOCK_SIZE;
-
- if(mftr->attr_list_len)
- memmove(mftr->attr_list_buf, mftr->attr_list, mftr->attr_list_len);
- mftr->attr_list = mftr->attr_list_buf;
-
- if(read_attribute( NULL, mftr->attr_list_off,
- mftr->attr_list_buf + mftr->attr_list_len,
- len, &mftr->attr_list_runl) != len)
- {
-#ifdef DEBUG_NTFS
- printf("CORRUPT NON-RESIDENT ATTRIBUTE_LIST\n");
-#endif
- /* corrupt */
- errnum = ERR_FSYS_CORRUPT;
- mftr->attr_list_size = 0;
- mftr->attr_len = 0;
- mftr->attr_list = NULL;
- return 0;
- }
-
- mftr->attr_list_len += len;
- mftr->attr_list_off += len;
- goto again;
- }
-#endif
- mftr->attr_list = NULL;
- return 0;
-}
-#endif
-
-static int search_attribute( MFTR *mftr, int type, char *name)
-{
-#ifdef DEBUG_NTFS
- printf("searching attribute %x <%s>\n", type, name);
-#endif
-
- mftr->attr_type = type;
- mftr->attr_name = name;
- mftr->attr_list = NULL;
- mftr->attr_list_len = 0;
- mftr->attr_list_size = 0;
- mftr->attr_list_off = 0;
- dcrem = dclen = 0;
-
-#ifndef NO_ATTRIBUTE_LIST
- if(find_attribute(mftr->mft, at_attribute_list, NONAME,
- &mftr->attr_list, &mftr->attr_list_size,
- &mftr->attr_list_len, &mftr->attr_list_off)) {
- if(mftr->attr_list_off&ATTR_RESIDENT) {
- /* resident at_attribute_list */
- mftr->attr_list_size = 0;
-#ifdef DEBUG_NTFS
- printf("resident attribute_list len=%x\n", mftr->attr_list_len);
-#endif
- } else {
-#ifdef DEBUG_NTFS
- printf("non-resident attribute_list len=%x size=%x\n",
- mftr->attr_list_len, mftr->attr_list_size);
-#endif
-#ifndef NO_NON_RESIDENT_ATTRIBUTE_LIST
- init_run_list(mftr->attr_list, mftr->attr_list_len, &mftr->attr_list_runl, NULL);
- if(get_next_run(&mftr->attr_list_runl)==0 ||
- mftr->attr_list_runl.cnum==0)
- mftr->attr_list_size = 0;
-#endif
- mftr->attr_list = NULL;
- mftr->attr_list_len = 0;
- }
- }
-#endif
-
- if(find_attribute(mftr->mft, type, name,
- &mftr->attr, &mftr->attr_size, &mftr->attr_len,
- &mftr->attr_flag)
-#ifndef NO_ATTRIBUTE_LIST
- || get_next_attribute_list(mftr, &mftr->attr_size)
-#endif
- )
- {
-#ifndef NO_ATTRIBUTE_LIST
- if(!(mftr->attr_flag&ATTR_RESIDENT)){
- init_run_list(mftr->attr, mftr->attr_len, &mftr->runl, &mftr->attr_inited);
- if(mftr->attr_inited > mftr->attr_size)
- mftr->attr_inited = mftr->attr_size;
- if(get_next_run(&mftr->runl)==0) {
- mftr->attr_flag |= ATTR_RESIDENT;
- mftr->attr_len = 0;
- }
- } else
- mftr->attr_inited = mftr->attr_size;
-#endif
-
- return 1;
- }
-
- mftr->attr_type = 0;
- return 0;
-}
-
-static int get_run( RUNL *rl, int vcn, int *clp, int *lenp) {
- if(rl->evcn < vcn)
- return 0;
-
- if(rl->vcn > vcn) {
- rewind_run_list(rl);
- get_next_run(rl);
- }
-
- while(rl->vcn+rl->clen <= vcn)
- {
- if(get_next_run(rl)==0)
- return 0;
- }
-
- if(clp) *clp = rl->cnum == 0 ? 0 : rl->cnum + vcn - rl->vcn;
- if(lenp) *lenp = rl->clen - vcn + rl->vcn;
- return 1;
-}
-
-static int search_run(MFTR *mftr, int vcn) {
-
- if( mftr->attr==NULL && !search_attribute(mftr, mftr->attr_type, mftr->attr_name))
- return 0;
-
- if(mftr->runl.svcn > vcn)
- search_attribute(mftr, mftr->attr_type, mftr->attr_name);
-
-#ifdef NO_ATTRIBUTE_LIST
- if(mftr->runl.evcn < vcn)
- return 0;
-#else
- while(mftr->runl.evcn < vcn) {
- if(get_next_attribute_list(mftr, NULL)==0) {
- mftr->attr = NULL;
- return 0;
- }
- init_run_list(mftr->attr, mftr->attr_len, &mftr->runl, NULL);
- if(get_next_run(&mftr->runl)==0) {
- mftr->attr = NULL;
- return 0;
- }
- }
-#endif
-
- return 1;
-}
-
-static int read_attribute(MFTR *mftr, int offset, char *buf, int len, RUNL *from_rl) {
- int vcn;
- int cnum, clen;
- int done = 0;
- int n;
- RUNL *rl;
-
- if(!from_rl && (mftr->attr_flag & ATTR_RESIDENT)) {
- /* resident attribute */
- if(offset > mftr->attr_len)
- return 0;
- if(offset+len > mftr->attr_len)
- len = mftr->attr_len - offset;
- memmove( buf, mftr->attr + offset, len);
- return len;
- }
-
- vcn = offset / clustersize;
- offset %= clustersize;
-
- while(len>0) {
- if(from_rl)
- rl = from_rl;
- else if(search_run(mftr, vcn) == 0)
- break;
- else
- rl = &mftr->runl;
- if(get_run(rl, vcn, &cnum, &clen) == 0)
- break;
- if(cnum==0 && from_rl)
- break;
- n = clen * clustersize - offset;
- if(n > len) n = len;
- if(cnum==0) {
- memset( buf, 0, n);
- } else if(!devread(cnum*(clustersize>>9)+(offset>>9), offset&0x1ff, n, buf))
- break;
-
- buf += n;
- vcn += (offset+n)/clustersize;
- done += n;
- offset = 0;
- len -= n;
- }
- return done;
-}
-
-static int read_mft_record(int mftno, char *mft, int self){
-#ifdef DEBUG_NTFS
- printf("Reading MFT record: mftno=%d\n", mftno);
-#endif
- if( read_attribute( mmft, mftno * mft_record_size,
- mft, mft_record_size, self?mft_run:NULL) != mft_record_size)
- return 0;
- if(!fixup_record( mft, "FILE", mft_record_size))
- return 0;
- return 1;
-}
-
-#ifndef NO_NTFS_DECOMPRESSION
-static int get_16_cluster(MFTR *mftr, int vcn) {
- int n = 0, cnum, clen;
- while(n < 16 && search_run(mftr, vcn) && get_run(&mftr->runl, vcn, &cnum, &clen) && cnum) {
- if(clen > 16 - n)
- clen = 16 - n;
- vcn += clen;
- while(clen--)
- cluster16[n++] = cnum++;
- }
- cluster16[n] = 0;
- return n;
-}
-
-static inline int compressed_block_size( unsigned char *src ) {
- return 3 + (*(__u16 *)src & 0xfff);
-}
-
-static int decompress_block(unsigned char *dest, unsigned char *src) {
- int head;
- int copied=0;
- unsigned char *last;
- int bits;
- int tag=0;
-
- /* high bit indicates that compression was performed */
- if(!(*(__u16 *)src & 0x8000)) {
- memmove(dest,src+2,0x1000);
- return 0x1000;
- }
-
- if((head = *(__u16 *)src & 0xFFF)==0)
- /* block is not used */
- return 0;
-
- src += 2;
- last = src+head;
- bits = 0;
-
- while(src<=last)
- {
- if(copied>4096)
- {
-#ifdef DEBUG_NTFS
- printf("decompress error 1\n");
-#endif
- errnum = ERR_FSYS_CORRUPT;
- return 0;
- }
- if(!bits){
- tag=*(__u8 *)src;
- bits=8;
- src++;
- if(src>last)
- break;
- }
- if(tag & 1){
- int i,len,delta,code,lmask,dshift;
- code = *(__u16 *)src;
- src+=2;
- if(!copied)
- {
-#ifdef DEBUG_NTFS
- printf("decompress error 2\n");
-#endif
- errnum = ERR_FSYS_CORRUPT;
- return 0;
- }
- for(i=copied-1,lmask=0xFFF,dshift=12;i>=0x10;i>>=1)
- {
- lmask >>= 1;
- dshift--;
- }
- delta = code >> dshift;
- len = (code & lmask) + 3;
- for(i=0; i<len; i++)
- {
- dest[copied]=dest[copied-delta-1];
- copied++;
- }
- } else
- dest[copied++]=*(__u8 *)src++;
- tag>>=1;
- bits--;
- }
-
- return copied;
-}
-#endif
-
-int ntfs_read(char *buf, int len){
- int ret;
-#ifdef STAGE1_5
-/* stage2 can't be resident/compressed/encrypted files,
- * but does sparse flag, cause stage2 never sparsed
- */
- if((cmft->attr_flag&~ATTR_SPARSE) != ATTR_NORMAL)
- return 0;
- disk_read_func = disk_read_hook;
- ret = read_attribute(cmft, filepos, buf, len, 0);
- disk_read_func = NULL;
- filepos += ret;
-#else
-
-#ifndef NO_NTFS_DECOMPRESSION
- int off;
- int vcn;
- int size;
- int len0;
-#endif
-
- if(len<=0 || filepos >= cmft->attr_size || (cmft->attr_flag&ATTR_ENCRYPTED))
- return 0;
-
- if(filepos+len > cmft->attr_size)
- len = cmft->attr_size - filepos;
- if(filepos >= cmft->attr_inited) {
-#ifdef DEBUG_NTFS
-printf("reading uninitialized data 1\n");
-#endif
- memset(buf, 0, len);
- return len;
- } else if(filepos+len > cmft->attr_inited) {
- len0 = len;
- len = cmft->attr_inited - filepos;
- len0 -= len;
- } else
- len0 = 0;
-#ifdef DEBUG_NTFS
-printf("read filepos=%x filemax=%x inited=%x len=%x len0=%x\n",filepos,filemax,cmft->attr_inited,len,len0);
-#endif
-
- if((cmft->attr_flag&(ATTR_COMPRESSED|ATTR_RESIDENT)) != ATTR_COMPRESSED) {
- if(cmft->attr_flag==ATTR_NORMAL)
- disk_read_func = disk_read_hook;
- ret = read_attribute(cmft, filepos, buf, len, 0);
- if(cmft->attr_flag==ATTR_NORMAL)
- disk_read_func = NULL;
- filepos += ret;
- if(ret==len && len0) {
- memset(buf+len, 0, len0);
- filepos += len0;
- ret += len0;
- }
- return ret;
- }
-
- ret = 0;
-
-#ifndef NO_NTFS_DECOMPRESSION
- /* NTFS don't support compression if cluster size > 4k */
- if(clustersize > 4096) {
- errnum = ERR_FSYS_CORRUPT;
- return 0;
- }
-
- while(len > 0){
-#ifdef DEBUG_NTFS
-printf("Reading filepos=%x len=%x\n", filepos, len);
-#endif
- if(filepos >= dcoff && filepos < (dcoff+dclen)) {
-#ifdef DEBUG_NTFS
-printf("decompress cache %x+%x\n", dcoff, dclen);
-#endif
- size = dcoff + dclen - filepos;
- if(size > len) size = len;
- memmove( buf, dcdbuf + filepos - dcoff, size);
- filepos += size;
- len -= size;
- ret += size;
- buf += size;
- if(len==0) {
- if(len0) {
-#ifdef DEBUG_NTFS
-printf("reading uninitialized data 2\n");
-#endif
- memset(buf, 0, len0);
- filepos += len0;
- ret += len0;
- }
- return ret;
- }
- }
-
- vcn = filepos / clustersize / 16;
- vcn *= 16;
- off = filepos % (16 * clustersize);
- if( dcvcn != vcn || filepos < dcoff)
- dcrem = 0;
-
-#ifdef DEBUG_NTFS
-printf("vcn %x off %x dcrem %x\n", vcn, off, dcrem);
-#endif
- if(dcrem) {
- int head;
-
- /* reading source */
- if(dcslen < 2 || compressed_block_size(dcsptr) > dcslen) {
- if(cluster16[index16]==0) {
- errnum = ERR_FSYS_CORRUPT;
- return ret;
- }
- if(dcslen)
- memmove(dcsbuf, dcsptr, dcslen);
- dcsptr = dcsbuf;
- while((dcslen+clustersize) < DECOMP_SOURCE_BUFFER_SIZE) {
- if(cluster16[index16]==0)
- break;
-#ifdef DEBUG_NTFS
-printf("reading dcslen=%x cluster %x\n", dcslen, cluster16[index16]);
-#endif
- if(!devread(cluster16[index16]*(clustersize>>9), 0, clustersize, dcsbuf+dcslen))
- return ret;
- dcslen += clustersize;
- index16++;
- }
- }
- /* flush destination */
- dcoff += dclen;
- dclen = 0;
-
- while(dcrem && dclen < DECOMP_DEST_BUFFER_SIZE &&
- dcslen >= 2 && (head=compressed_block_size(dcsptr)) <= dcslen) {
- size = decompress_block(dcdbuf+dclen, dcsptr);
- if(dcrem>=0x1000 && size!=0x1000) {
- errnum = ERR_FSYS_CORRUPT;
- return ret;
- }
- dcrem -= size;
- dclen += size;
- dcsptr += head;
- dcslen -= head;
- }
- continue;
- }
- dclen = dcrem = 0;
-#ifdef DEBUG_NTFS
-printf("get next 16 clusters\n");
-#endif
- switch(get_16_cluster(cmft, vcn)) {
- case 0:
-#ifdef DEBUG_NTFS
-printf("sparse\n");
-#endif
- /* sparse */
- size = 16 * clustersize - off;
- if( len < size )
- size = len;
-#ifndef STAGE1_5
- memset( buf, 0, size);
-#endif
- filepos += size;
- len -= size;
- ret += size;
- buf += size;
- break;
-
- case 16:
-#ifdef DEBUG_NTFS
-printf("uncompressed\n");
-#endif
- /* uncompressed */
- index16 = off / clustersize;
- off %= clustersize;
- while(index16 < 16) {
- size = clustersize - off;
- if( len < size )
- size = len;
- if(!devread(cluster16[index16]*(clustersize>>9)+(off>>9), off&0x1ff, size, buf))
- return ret;
- filepos += size;
- len -= size;
- ret += size;
- if(len==0)
- return ret;
- off = 0;
- buf += size;
- index16++;
- }
- break;
-
- default:
-#ifdef DEBUG_NTFS
-printf("compressed\n");
-#endif
- index16 = 0;
- dcvcn = vcn;
- dcoff = vcn * clustersize;
- dcrem = cmft->attr_inited - dcoff;
- if(dcrem > 16 * clustersize)
- dcrem = 16 * clustersize;
- dcsptr = dcsbuf;
- dcslen = 0;
- }
- }
- if(len0) {
-#ifdef DEBUG_NTFS
-printf("reading uninitialized data 3\n");
-#endif
- memset(buf, 0, len0);
- filepos += len0;
- ret += len0;
- }
-#else
- errnum = FSYS_CORRUPT;
-#endif /*NO_NTFS_DECOMPRESSION*/
-#endif /*STAGE1_5*/
- return ret;
-}
-
-int ntfs_mount (void)
-{
- char *sb = (char *)FSYS_BUF;
- int mft_record;
- int spc;
-
- if (((current_drive & 0x80) || (current_slice != 0))
- && (current_slice != /*PC_SLICE_TYPE_NTFS*/7)
- && (current_slice != /*PC_SLICE_TYPE_NTFS*/0x17))
- return 0;
-
- if (!devread (0, 0, 512, (char *) FSYS_BUF))
- return 0; /* Cannot read superblock */
-
- if(sb[3]!='N' || sb[4]!='T' || sb[5]!='F' || sb[6]!='S')
- return 0;
- blocksize = *(__u16 *)(sb+0xb);
- spc = *(unsigned char *)(sb+0xd);
- clustersize = spc * blocksize;
- mft_record_size = *(char *)(sb+0x40);
- index_record_size = *(char *)(sb+0x44);
- if(mft_record_size>0)
- mft_record_size *= clustersize;
- else
- mft_record_size = 1 << (-mft_record_size);
-
- index_record_size *= clustersize;
- mft_record = *(__u32 *)(sb+0x30); /* only support 32 bit */
- spc = clustersize / 512;
-
- if(mft_record_size > MAX_MFT_RECORD_SIZE || index_record_size > MAX_INDEX_RECORD_SIZE) {
- /* only support 1k MFT record, 4k INDEX record */
- return 0;
- }
-
-#ifdef DEBUG_NTFS
- printf("spc=%x mft_record=%x:%x\n", spc, *(__s64 *)(sb+0x30));
-#endif
-
- if (!devread (mft_record*spc, 0, mft_record_size, mmft->mft))
- return 0; /* Cannot read superblock */
-
- if(!fixup_record( mmft->mft, "FILE", mft_record_size))
- return 0;
-
-#ifndef NO_ALTERNATE_DATASTREAM
- is_ads_completion = 0;
-#endif
- if(!search_attribute(mmft, at_data, NONAME)) return 0;
-
- *mft_run = mmft->runl;
-
- *path_ino = FILE_ROOT;
-
- return 1;
-}
-
-int
-ntfs_dir (char *dirname)
-{
- char *rest, ch;
- int namelen;
- int depth = 0;
- int chk_sfn = 1;
- int flag = 0;
- int record_offset;
- int my_index_record_size;
- unsigned char *index_entry = 0, *entry, *index_end;
- int i;
-
- /* main loop to find desired directory entry */
-loop:
-
-#ifdef DEBUG_NTFS
- printf("dirname=%s\n", dirname);
-#endif
- if(!read_mft_record(path_ino[depth], cmft->mft, 0))
- {
-#ifdef DEBUG_NTFS
- printf("MFT error 1\n");
-#endif
- errnum = ERR_FSYS_CORRUPT;
- return 0;
- }
-
- /* if we have a real file (and we're not just printing possibilities),
- then this is where we want to exit */
-
- if (!*dirname || isspace (*dirname) || *dirname==':')
- {
-#ifndef STAGE1_5
-#ifndef NO_ALTERNATE_DATASTREAM
- if (*dirname==':' && print_possibilities) {
- char *tmp;
-
- /* preparing ADS name completion */
- for(tmp = dirname; *tmp != '/'; tmp--);
- for(tmp++, rest=fnbuf; *tmp && !isspace(*tmp); *rest++ = *tmp++)
- if(*tmp==':') dirname = rest;
- *rest++ = '\0';
-
- is_ads_completion = 1;
- search_attribute(cmft, at_data, dirname+1);
- is_ads_completion = 0;
-
- if(errnum==0) {
- if(print_possibilities < 0)
- return 1;
- errnum = ERR_FILE_NOT_FOUND;
- }
- return 0;
- }
-#endif
-#endif
-
- if (*dirname==':') dirname++;
- for (rest = dirname; (ch = *rest) && !isspace (ch); rest++);
- *rest = 0;
-
-#ifdef DEBUG_NTFS
- printf("got file: search at_data\n");
-#endif
-
- if (!search_attribute(cmft, at_data, dirname)) {
- errnum = *(dirname-1)==':'?ERR_FILE_NOT_FOUND:ERR_BAD_FILETYPE;
- *rest = ch;
- return 0;
- }
- *rest = ch;
-
- filemax = cmft->attr_size;
-#ifdef DEBUG_NTFS
- printf("filemax=%x\n", filemax);
-#endif
- return 1;
- }
-
- if(depth >= (MAX_DIR_DEPTH-1)) {
- errnum = ERR_FSYS_CORRUPT;
- return 0;
- }
-
- /* continue with the file/directory name interpretation */
-
- while (*dirname == '/')
- dirname++;
-
- for (rest = dirname; (ch = *rest) && !isspace (ch) && ch != '/' && ch != ':'; rest++);
-
- *rest = 0;
-
- if (!search_attribute(cmft, at_index_root, "$I30"))
- {
- errnum = ERR_BAD_FILETYPE;
- return 0;
- }
-
- read_attribute(cmft, 0, fnbuf, 16, 0);
- my_index_record_size = *(__u32 *)(fnbuf+8);
-
- if(my_index_record_size > MAX_INDEX_RECORD_SIZE) {
- errnum = ERR_FSYS_CORRUPT;
- return 0;
- }
-
-#ifdef DEBUG_NTFS
- printf("index_record_size=%x\n", my_index_record_size);
-#endif
-
- if(cmft->attr_size > MAX_INDEX_RECORD_SIZE) {
- errnum = ERR_FSYS_CORRUPT;
- return 0;
- }
- read_attribute(cmft, 0, index_data, cmft->attr_size, 0);
- index_end = index_data + cmft->attr_size;
- index_entry = index_data + 0x20;
- record_offset = -1;
-
-#ifndef STAGE1_5
- if (print_possibilities && ch != '/' && ch != ':' && !*dirname)
- {
- print_possibilities = -print_possibilities;
- /* fake '.' for empty directory */
- print_a_completion (".");
- }
-#endif
-
- if (search_attribute(cmft, at_bitmap, "$I30")) {
- if(cmft->attr_size > MAX_INDEX_BITMAP_SIZE) {
- errnum = ERR_FSYS_CORRUPT;
- return 0;
- }
-
- read_attribute(cmft, 0, bitmap_data, cmft->attr_size, 0);
-
- if (search_attribute(cmft, at_index_allocation, "$I30")==0) {
- errnum = ERR_FSYS_CORRUPT;
- return 0;
- }
-
- for(record_offset = 0; record_offset*my_index_record_size<cmft->attr_size; record_offset++){
- int bit = 1 << (record_offset&3);
- int byte = record_offset>>3;
-#ifdef DEBUG_NTFS
- printf("record_offset=%x\n", record_offset);
-#endif
- if((bitmap_data[byte]&bit))
- break;
- }
-
- if(record_offset*my_index_record_size>=cmft->attr_size) record_offset = -1;
- }
-
- do
- {
- entry = index_entry; index_entry += *(__u16 *)(entry+8);
- if(entry+0x50>=index_entry||entry>=index_end||
- index_entry>=index_end||(entry[0x12]&2)){
- if(record_offset < 0 ||
- !read_attribute(cmft, record_offset*my_index_record_size, index_data, my_index_record_size, 0)){
- if (!errnum)
- {
- if (print_possibilities < 0)
- {
-#if 0
- putchar ('\n');
-#endif
- return 1;
- }
-
- errnum = ERR_FILE_NOT_FOUND;
- *rest = ch;
- }
-
- return 0;
- }
- if(!fixup_record( index_data, "INDX", my_index_record_size))
- {
-#ifdef DEBUG_NTFS
- printf("index error\n");
-#endif
- errnum = ERR_FSYS_CORRUPT;
- return 0;
- }
- entry = index_data + 0x18 + *(__u16 *)(index_data+0x18);
- index_entry = entry + *(__u16 *)(entry+8);
- index_end = index_data + my_index_record_size - 0x52;
- for(record_offset++; record_offset*my_index_record_size<cmft->attr_size; record_offset++){
- int bit = 1 << (record_offset&3);
- int byte = record_offset>>3;
- if((bitmap_data[byte]&bit)) break;
- }
- if(record_offset*my_index_record_size>=cmft->attr_size) record_offset = -1;
-#ifdef DEBUG_NTFS
- printf("record_offset=%x\n", record_offset);
-#endif
- }
- flag = entry[0x51];
- path_ino[depth+1] = *(__u32 *)entry;
- if(path_ino[depth+1] < 16)
- continue;
- namelen = entry[0x50];
- //if(index_data[0x48]&2) printf("hidden file\n");
-#ifndef STAGE1_5
- /* skip short file name */
- if( flag == 2 && print_possibilities && ch != '/' && ch != ':' )
- continue;
-#endif
-
- for( i = 0, entry+=0x52; i < namelen; i++, entry+=2 )
- {
- int c = *(__u16 *)entry;
- if(c==' '||c>=0x100)
- fnbuf[i] = '_';
- else
- fnbuf[i] = c;
- }
- fnbuf[namelen] = 0;
-#ifdef DEBUG_NTFS
- printf("FLAG: %d NAME: %s inum=%d\n", flag,fnbuf,path_ino[depth+1]);
-#endif
-
- //uncntrl(fnbuf);
-
- chk_sfn = nsubstring(dirname,fnbuf);
-#ifndef STAGE1_5
- if (print_possibilities && ch != '/' && ch != ':'
- && (!*dirname || chk_sfn <= 0))
- {
- if (print_possibilities > 0)
- print_possibilities = -print_possibilities;
- print_a_completion (fnbuf);
- }
-#endif /* STAGE1_5 */
- }
- while (chk_sfn != 0 ||
- (print_possibilities && ch != '/' && ch != ':'));
-
- *(dirname = rest) = ch;
-
- depth++;
-
- /* go back to main loop at top of function */
- goto loop;
-}
-
-#ifdef DEBUG_NTFS
-int dump_block(char *msg, char *buf, int size){
- int l = (size+15)/16;
- int off;
- int i, j;
- int c;
- printf("----- %s -----\n", msg);
- for( i = 0, off = 0; i < l; i++, off+=16)
- {
- if(off<16)
- printf("000%x:", off);
- else if(off<256)
- printf("00%x:", off);
- else
- printf("0%x:", off);
- for(j=0;j<16;j++)
- {
- c = buf[off+j]&0xff;
- if( c >= 16 )
- printf("%c%x",j==8?'-':' ',c);
- else
- printf("%c0%x",j==8?'-':' ',c);
- }
- printf(" ");
- for(j=0;j<16;j++) {
- char c = buf[off+j];
- printf("%c",c<' '||c>='\x7f'?'.':c);
- }
- printf("\n");
- }
-}
-#endif
-#endif /* FSYS_NTFS */