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Re: [PATCH] Move NTFS compression support to new module ntfscomp
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From: |
Bean |
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Subject: |
Re: [PATCH] Move NTFS compression support to new module ntfscomp |
|
Date: |
Wed, 12 Dec 2007 23:56:36 +0800 |
Ok.
2007-12-12 Bean <address@hidden>
* conf/common.rmk (pkgdata_MODULES): Add ntfscomp.mod.
(ntfscomp_mod_SOURCES): New variable.
(ntfscomp_mod_CFLAGS): Likewise.
(ntfscomp_mod_LDFLAGS): Likewise.
* conf/i386-pc.rmk (grub_setup_SOURCES): Add fs/ntfscomp.c.
(grub_probe_SOURCES): Likewise.
(grub_emu_SOURCES): Likewise.
* conf/i386-efi.rmk (grub_probe_SOURCES): Add fs/ntfscomp.c.
(grub_emu_SOURCES): Likewise.
* conf/i386-linuxbios.rmk (grub_probe_SOURCES): Add fs/ntfscomp.c.
(grub_emu_SOURCES): Likewise.
* conf/powerpc-ieee1275.rmk (grub_probe_SOURCES): Add fs/ntfscomp.c.
(grub_emu_SOURCES): Likewise.
* fs/ntfs.c (grub_ntfscomp_func): New variable.
(read_run_list): Renamed to grub_ntfs_read_run_list.
(decomp_nextvcn): Moved to ntfscomp.c.
(decomp_getch): Likewise.
(decomp_get16): Likewise.
(decomp_block): Likewise.
(read_block): Likewise.
(read_data): Partially moved to ntfscomp.c.
(fixup): Change unsigned to grub_uint16_t.
(read_mft): Change unsigned long to grub_uint32_t.
(read_attr): Likewise.
(read_data): Likewise.
(read_run_data): Likewise.
(read_run_list): Likewise.
(read_mft): Likewise.
* fs/ntfscomp.c: New file.
* include/grub/ntfs.h: New file.
Index: conf/common.rmk
===================================================================
RCS file: /sources/grub/grub2/conf/common.rmk,v
retrieving revision 1.17
diff -u -p -r1.17 common.rmk
--- conf/common.rmk 18 Nov 2007 06:41:45 -0000 1.17
+++ conf/common.rmk 29 Nov 2007 18:23:10 -0000
@@ -81,7 +81,7 @@ update-grub_DATA += util/grub.d/README
# Filing systems.
pkgdata_MODULES += fshelp.mod fat.mod ufs.mod ext2.mod ntfs.mod \
minix.mod hfs.mod jfs.mod iso9660.mod xfs.mod affs.mod \
- sfs.mod hfsplus.mod
+ sfs.mod hfsplus.mod ntfscomp.mod
# For fshelp.mod.
fshelp_mod_SOURCES = fs/fshelp.c
@@ -108,6 +108,11 @@ ntfs_mod_SOURCES = fs/ntfs.c
ntfs_mod_CFLAGS = $(COMMON_CFLAGS)
ntfs_mod_LDFLAGS = $(COMMON_LDFLAGS)
+# For ntfscomp.mod.
+ntfscomp_mod_SOURCES = fs/ntfscomp.c
+ntfscomp_mod_CFLAGS = $(COMMON_CFLAGS)
+ntfscomp_mod_LDFLAGS = $(COMMON_LDFLAGS)
+
# For minix.mod.
minix_mod_SOURCES = fs/minix.c
minix_mod_CFLAGS = $(COMMON_CFLAGS)
Index: conf/i386-efi.rmk
===================================================================
RCS file: /sources/grub/grub2/conf/i386-efi.rmk,v
retrieving revision 1.24
diff -u -p -r1.24 i386-efi.rmk
--- conf/i386-efi.rmk 18 Nov 2007 06:41:45 -0000 1.24
+++ conf/i386-efi.rmk 29 Nov 2007 18:23:11 -0000
@@ -36,7 +36,7 @@ grub_probe_SOURCES = util/grub-probe.c \
partmap/pc.c partmap/apple.c partmap/gpt.c \
fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c fs/ntfs.c kern/fs.c \
kern/env.c fs/fshelp.c fs/xfs.c fs/affs.c fs/sfs.c fs/hfsplus.c \
- disk/lvm.c disk/raid.c grub_probe_init.c
+ fs/ntfscomp.c disk/lvm.c disk/raid.c grub_probe_init.c
# For grub-emu.
grub_emu_DEPENDENCIES = grub_script.tab.c grub_script.tab.h \
@@ -50,7 +50,7 @@ grub_emu_SOURCES = commands/boot.c comma
disk/loopback.c \
fs/affs.c fs/ext2.c fs/fat.c fs/fshelp.c fs/hfs.c fs/iso9660.c \
fs/jfs.c fs/minix.c fs/sfs.c fs/ufs.c fs/xfs.c fs/hfsplus.c \
- fs/ntfs.c \
+ fs/ntfs.c fs/ntfscomp.c \
io/gzio.c \
kern/device.c kern/disk.c kern/dl.c kern/elf.c kern/env.c \
kern/err.c \
Index: conf/i386-linuxbios.rmk
===================================================================
RCS file: /sources/grub/grub2/conf/i386-linuxbios.rmk,v
retrieving revision 1.3
diff -u -p -r1.3 i386-linuxbios.rmk
--- conf/i386-linuxbios.rmk 18 Nov 2007 06:41:45 -0000 1.3
+++ conf/i386-linuxbios.rmk 29 Nov 2007 18:23:14 -0000
@@ -60,7 +60,7 @@ grub_probe_SOURCES = util/grub-probe.c \
partmap/pc.c partmap/apple.c partmap/gpt.c \
fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c fs/ntfs.c kern/fs.c \
kern/env.c fs/fshelp.c fs/xfs.c fs/affs.c fs/sfs.c fs/hfsplus.c \
- disk/lvm.c disk/raid.c grub_probe_init.c
+ fs/ntfscomp.c disk/lvm.c disk/raid.c grub_probe_init.c
# For grub-emu.
grub_emu_DEPENDENCIES = grub_script.tab.c grub_script.tab.h \
@@ -74,7 +74,7 @@ grub_emu_SOURCES = commands/boot.c comma
disk/host.c disk/loopback.c disk/raid.c disk/lvm.c \
fs/affs.c fs/ext2.c fs/fat.c fs/fshelp.c fs/hfs.c fs/iso9660.c \
fs/jfs.c fs/minix.c fs/sfs.c fs/ufs.c fs/xfs.c fs/hfsplus.c \
- fs/ntfs.c \
+ fs/ntfs.c fs/ntfscomp.c \
io/gzio.c \
kern/device.c kern/disk.c kern/dl.c kern/elf.c kern/env.c \
kern/err.c \
Index: conf/i386-pc.rmk
===================================================================
RCS file: /sources/grub/grub2/conf/i386-pc.rmk,v
retrieving revision 1.94
diff -u -p -r1.94 i386-pc.rmk
--- conf/i386-pc.rmk 18 Nov 2007 06:41:45 -0000 1.94
+++ conf/i386-pc.rmk 29 Nov 2007 18:23:21 -0000
@@ -68,7 +68,7 @@ grub_setup_SOURCES = util/i386/pc/grub-s
fs/sfs.c kern/parser.c kern/partition.c partmap/pc.c \
partmap/gpt.c fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c fs/ntfs.c \
fs/hfsplus.c kern/file.c kern/fs.c kern/env.c fs/fshelp.c \
- util/raid.c util/lvm.c grub_setup_init.c
+ fs/ntfscomp.c util/raid.c util/lvm.c grub_setup_init.c
# For grub-mkdevicemap.
grub_mkdevicemap_SOURCES = util/grub-mkdevicemap.c util/misc.c \
@@ -83,7 +83,7 @@ grub_probe_SOURCES = util/grub-probe.c \
partmap/pc.c partmap/apple.c partmap/gpt.c \
fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c fs/ntfs.c kern/fs.c \
kern/env.c fs/fshelp.c fs/xfs.c fs/affs.c fs/sfs.c fs/hfsplus.c \
- disk/lvm.c disk/raid.c grub_probe_init.c
+ fs/ntfscomp.c disk/lvm.c disk/raid.c grub_probe_init.c
# For grub-emu.
grub_emu_DEPENDENCIES = grub_script.tab.c grub_script.tab.h \
@@ -97,7 +97,7 @@ grub_emu_SOURCES = commands/boot.c comma
disk/host.c disk/loopback.c disk/raid.c disk/lvm.c \
fs/affs.c fs/ext2.c fs/fat.c fs/fshelp.c fs/hfs.c fs/iso9660.c \
fs/jfs.c fs/minix.c fs/sfs.c fs/ufs.c fs/xfs.c fs/hfsplus.c \
- fs/ntfs.c \
+ fs/ntfs.c fs/ntfscomp.c \
io/gzio.c \
kern/device.c kern/disk.c kern/dl.c kern/elf.c kern/env.c \
kern/err.c \
Index: conf/powerpc-ieee1275.rmk
===================================================================
RCS file: /sources/grub/grub2/conf/powerpc-ieee1275.rmk,v
retrieving revision 1.75
diff -u -p -r1.75 powerpc-ieee1275.rmk
--- conf/powerpc-ieee1275.rmk 18 Nov 2007 06:41:46 -0000 1.75
+++ conf/powerpc-ieee1275.rmk 29 Nov 2007 18:23:24 -0000
@@ -48,7 +48,7 @@ grub_probe_SOURCES = util/grub-probe.c \
partmap/pc.c partmap/apple.c partmap/gpt.c \
fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c fs/ntfs.c kern/fs.c \
kern/env.c fs/fshelp.c fs/xfs.c fs/affs.c fs/sfs.c fs/hfsplus.c \
- disk/lvm.c disk/raid.c grub_probe_init.c
+ fs/ntfscomp.c disk/lvm.c disk/raid.c grub_probe_init.c
# For grub-emu
grub_emu_DEPENDENCIES = grub_script.tab.c grub_script.tab.h \
@@ -61,7 +61,7 @@ grub_emu_SOURCES = commands/boot.c comma
disk/loopback.c \
fs/affs.c fs/ext2.c fs/fat.c fs/fshelp.c fs/hfs.c fs/iso9660.c \
fs/jfs.c fs/minix.c fs/sfs.c fs/ufs.c fs/xfs.c fs/hfsplus.c \
- fs/ntfs.c \
+ fs/ntfs.c fs/ntfscomp.c \
io/gzio.c \
kern/device.c kern/disk.c kern/dl.c kern/elf.c kern/env.c \
kern/err.c kern/file.c kern/fs.c kern/loader.c kern/main.c \
Index: fs/ntfs.c
===================================================================
RCS file: /sources/grub/grub2/fs/ntfs.c,v
retrieving revision 1.2
diff -u -p -r1.2 ntfs.c
--- fs/ntfs.c 10 Nov 2007 20:08:33 -0000 1.2
+++ fs/ntfs.c 29 Nov 2007 18:12:25 -0000
@@ -23,169 +23,20 @@
#include <grub/disk.h>
#include <grub/dl.h>
#include <grub/fshelp.h>
-
-#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_OBJECT_ID 0x40
-#define AT_SECURITY_DESCRIPTOR 0x50
-#define AT_VOLUME_NAME 0x60
-#define AT_VOLUME_INFORMATION 0x70
-#define AT_DATA 0x80
-#define AT_INDEX_ROOT 0x90
-#define AT_INDEX_ALLOCATION 0xA0
-#define AT_BITMAP 0xB0
-#define AT_SYMLINK 0xC0
-#define AT_EA_INFORMATION 0xD0
-#define AT_EA 0xE0
-
-#define ATTR_READ_ONLY 0x1
-#define ATTR_HIDDEN 0x2
-#define ATTR_SYSTEM 0x4
-#define ATTR_ARCHIVE 0x20
-#define ATTR_DEVICE 0x40
-#define ATTR_NORMAL 0x80
-#define ATTR_TEMPORARY 0x100
-#define ATTR_SPARSE 0x200
-#define ATTR_REPARSE 0x400
-#define ATTR_COMPRESSED 0x800
-#define ATTR_OFFLINE 0x1000
-#define ATTR_NOT_INDEXED 0x2000
-#define ATTR_ENCRYPTED 0x4000
-#define ATTR_DIRECTORY 0x10000000
-#define ATTR_INDEX_VIEW 0x20000000
-
-#define FLAG_COMPRESSED 1
-#define FLAG_ENCRYPTED 0x4000
-#define FLAG_SPARSE 0x8000
-
-#define BLK_SHR GRUB_DISK_SECTOR_BITS
-
-#define MAX_MFT (1024 >> BLK_SHR)
-#define MAX_IDX (16384 >> BLK_SHR)
-#define MAX_SPC (4096 >> BLK_SHR)
-
-#define COM_LEN 4096
-#define COM_SEC (COM_LEN >> BLK_SHR)
-
-#define BMP_LEN 4096
-
-#define AF_ALST 1
-#define AF_MMFT 2
-#define AF_GPOS 4
-
-#define RF_COMP 1
-#define RF_CBLK 2
-#define RF_BLNK 4
-
-#define valueat(buf,ofs,type) *((type*)(((char*)buf)+ofs))
-
-#define u16at(buf,ofs) grub_le_to_cpu16(valueat(buf,ofs,grub_uint16_t))
-#define u32at(buf,ofs) grub_le_to_cpu32(valueat(buf,ofs,grub_uint32_t))
-#define u64at(buf,ofs) grub_le_to_cpu64(valueat(buf,ofs,grub_uint64_t))
-
-#define v16at(buf,ofs) valueat(buf,ofs,grub_uint16_t)
-#define v32at(buf,ofs) valueat(buf,ofs,grub_uint32_t)
-#define v64at(buf,ofs) valueat(buf,ofs,grub_uint64_t)
-
-struct grub_ntfs_bpb
-{
- grub_uint8_t jmp_boot[3];
- grub_uint8_t oem_name[8];
- grub_uint16_t bytes_per_sector;
- grub_uint8_t sectors_per_cluster;
- grub_uint8_t reserved_1[7];
- grub_uint8_t media;
- grub_uint16_t reserved_2;
- grub_uint16_t sectors_per_track;
- grub_uint16_t num_heads;
- grub_uint32_t num_hidden_sectors;
- grub_uint32_t reserved_3[2];
- grub_uint64_t num_total_sectors;
- grub_uint64_t mft_lcn;
- grub_uint64_t mft_mirr_lcn;
- grub_int8_t clusters_per_mft;
- grub_int8_t reserved_4[3];
- grub_int8_t clusters_per_index;
- grub_int8_t reserved_5[3];
- grub_uint64_t serial_number;
- grub_uint32_t checksum;
-} __attribute__ ((packed));
-
-#define grub_ntfs_file grub_fshelp_node
-
-struct grub_ntfs_attr
-{
- int flags;
- char *emft_buf, *edat_buf;
- char *attr_cur, *attr_nxt, *attr_end;
- unsigned long save_pos;
- char *sbuf;
- struct grub_ntfs_file *mft;
-};
-
-struct grub_fshelp_node
-{
- struct grub_ntfs_data *data;
- char *buf;
- grub_uint32_t size;
- grub_uint32_t ino;
- int inode_read;
- struct grub_ntfs_attr attr;
-};
-
-struct grub_ntfs_data
-{
- struct grub_ntfs_file cmft;
- struct grub_ntfs_file mmft;
- grub_disk_t disk;
- grub_uint32_t mft_size;
- grub_uint32_t idx_size;
- grub_uint32_t spc;
- grub_uint32_t blocksize;
- grub_uint32_t mft_start;
-};
-
-struct grub_ntfs_comp
-{
- grub_disk_t disk;
- int comp_head, comp_tail;
- unsigned long comp_table[16][2];
- unsigned long cbuf_ofs, cbuf_vcn, spc;
- char *cbuf;
-};
-
-struct grub_ntfs_rlst
-{
- int flags;
- unsigned long target_vcn, curr_vcn, next_vcn, curr_lcn;
- char *cur_run;
- struct grub_ntfs_attr *attr;
- struct grub_ntfs_comp comp;
-};
+#include <grub/ntfs.h>
#ifndef GRUB_UTIL
static grub_dl_t my_mod;
#endif
+ntfscomp_func_t grub_ntfscomp_func;
+
static grub_err_t
fixup (struct grub_ntfs_data *data, char *buf, int len, char *magic)
{
int ss;
char *pu;
- unsigned us;
+ grub_uint16_t us;
if (grub_memcmp (buf, magic, 4))
return grub_error (GRUB_ERR_BAD_FS, "%s label not found", magic);
@@ -212,9 +63,9 @@ fixup (struct grub_ntfs_data *data, char
}
static grub_err_t read_mft (struct grub_ntfs_data *data, char *buf,
- unsigned long mftno);
+ grub_uint32_t mftno);
static grub_err_t read_attr (struct grub_ntfs_attr *at, char *dest,
- unsigned long ofs, unsigned long len,
+ grub_uint32_t ofs, grub_uint32_t len,
int cached,
void
NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t
@@ -223,7 +74,7 @@ static grub_err_t read_attr (struct grub
unsigned length));
static grub_err_t read_data (struct grub_ntfs_attr *at, char *pa, char *dest,
- unsigned long ofs, unsigned long len,
+ grub_uint32_t ofs, grub_uint32_t len,
int cached,
void
NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t
@@ -413,9 +264,9 @@ locate_attr (struct grub_ntfs_attr *at,
}
static char *
-read_run_data (char *run, int nn, unsigned long *val, int sig)
+read_run_data (char *run, int nn, grub_uint32_t * val, int sig)
{
- unsigned long r, v;
+ grub_uint32_t r, v;
r = 0;
v = 1;
@@ -433,11 +284,11 @@ read_run_data (char *run, int nn, unsign
return run;
}
-static grub_err_t
-read_run_list (struct grub_ntfs_rlst *ctx)
+grub_err_t
+grub_ntfs_read_run_list (struct grub_ntfs_rlst * ctx)
{
int c1, c2;
- unsigned long val;
+ grub_uint32_t val;
char *run;
run = ctx->cur_run;
@@ -482,294 +333,32 @@ retry:
return 0;
}
-static grub_err_t
-decomp_nextvcn (struct grub_ntfs_comp *cc)
-{
- if (cc->comp_head >= cc->comp_tail)
- return grub_error (GRUB_ERR_BAD_FS, "Compression block overflown");
- if (grub_disk_read
- (cc->disk,
- (cc->comp_table[cc->comp_head][1] -
- (cc->comp_table[cc->comp_head][0] - cc->cbuf_vcn)) * cc->spc, 0,
- cc->spc << BLK_SHR, cc->cbuf))
- return grub_errno;
- cc->cbuf_vcn++;
- if ((cc->cbuf_vcn >= cc->comp_table[cc->comp_head][0]))
- cc->comp_head++;
- cc->cbuf_ofs = 0;
- return 0;
-}
-
-static grub_err_t
-decomp_getch (struct grub_ntfs_comp *cc, unsigned char *res)
-{
- if (cc->cbuf_ofs >= (cc->spc << BLK_SHR))
- {
- if (decomp_nextvcn (cc))
- return grub_errno;
- }
- *res = (unsigned char) cc->cbuf[cc->cbuf_ofs++];
- return 0;
-}
-
-static grub_err_t
-decomp_get16 (struct grub_ntfs_comp *cc, grub_uint16_t * res)
-{
- unsigned char c1, c2;
-
- if ((decomp_getch (cc, &c1)) || (decomp_getch (cc, &c2)))
- return grub_errno;
- *res = ((grub_uint16_t) c2) * 256 + ((grub_uint16_t) c1);
- return 0;
-}
-
-/* Decompress a block (4096 bytes) */
-static grub_err_t
-decomp_block (struct grub_ntfs_comp *cc, char *dest)
-{
- grub_uint16_t flg, cnt;
-
- if (decomp_get16 (cc, &flg))
- return grub_errno;
- cnt = (flg & 0xFFF) + 1;
-
- if (dest)
- {
- if (flg & 0x8000)
- {
- unsigned char tag;
- unsigned long bits, copied;
-
- bits = copied = tag = 0;
- while (cnt > 0)
- {
- if (copied > COM_LEN)
- return grub_error (GRUB_ERR_BAD_FS,
- "Compression block too large");
-
- if (!bits)
- {
- if (decomp_getch (cc, &tag))
- return grub_errno;
-
- bits = 8;
- cnt--;
- if (cnt <= 0)
- break;
- }
- if (tag & 1)
- {
- unsigned long i, len, delta, code, lmask, dshift;
- grub_uint16_t word;
-
- if (decomp_get16 (cc, &word))
- return grub_errno;
-
- code = word;
- cnt -= 2;
-
- if (!copied)
- {
- grub_error (GRUB_ERR_BAD_FS, "Context window empty");
- 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
- {
- unsigned char ch;
-
- if (decomp_getch (cc, &ch))
- return grub_errno;
- dest[copied++] = ch;
- cnt--;
- }
- tag >>= 1;
- bits--;
- }
- return 0;
- }
- else
- {
- if (cnt != COM_LEN)
- return grub_error (GRUB_ERR_BAD_FS,
- "Invalid compression block size");
- }
- }
-
- while (cnt > 0)
- {
- int n;
-
- n = (cc->spc << BLK_SHR) - cc->cbuf_ofs;
- if (n > cnt)
- n = cnt;
- if ((dest) && (n))
- {
- memcpy (dest, &cc->cbuf[cc->cbuf_ofs], n);
- dest += n;
- }
- cnt -= n;
- cc->cbuf_ofs += n;
- if ((cnt) && (decomp_nextvcn (cc)))
- return grub_errno;
- }
- return 0;
-}
-
-static grub_err_t
-read_block (struct grub_ntfs_rlst *ctx, char *buf, int num)
-{
- int cpb = COM_SEC / ctx->comp.spc;
-
- while (num)
- {
- int nn;
-
- if ((ctx->target_vcn & 0xF) == 0)
- {
-
- if (ctx->comp.comp_head != ctx->comp.comp_tail)
- return grub_error (GRUB_ERR_BAD_FS, "Invalid compression block");
- ctx->comp.comp_head = ctx->comp.comp_tail = 0;
- ctx->comp.cbuf_vcn = ctx->target_vcn;
- ctx->comp.cbuf_ofs = (ctx->comp.spc << BLK_SHR);
- if (ctx->target_vcn >= ctx->next_vcn)
- {
- if (read_run_list (ctx))
- return grub_errno;
- }
- while (ctx->target_vcn + 16 > ctx->next_vcn)
- {
- if (ctx->flags & RF_BLNK)
- break;
- ctx->comp.comp_table[ctx->comp.comp_tail][0] = ctx->next_vcn;
- ctx->comp.comp_table[ctx->comp.comp_tail][1] =
- ctx->curr_lcn + ctx->next_vcn - ctx->curr_vcn;
- ctx->comp.comp_tail++;
- if (read_run_list (ctx))
- return grub_errno;
- }
- }
-
- nn = (16 - (ctx->target_vcn & 0xF)) / cpb;
- if (nn > num)
- nn = num;
- num -= nn;
-
- if (ctx->flags & RF_BLNK)
- {
- ctx->target_vcn += nn * cpb;
- if (ctx->comp.comp_tail == 0)
- {
- if (buf)
- {
- grub_memset (buf, 0, nn * COM_LEN);
- buf += nn * COM_LEN;
- }
- }
- else
- {
- while (nn)
- {
- if (decomp_block (&ctx->comp, buf))
- return grub_errno;
- if (buf)
- buf += COM_LEN;
- nn--;
- }
- }
- }
- else
- {
- nn *= cpb;
- while ((ctx->comp.comp_head < ctx->comp.comp_tail) && (nn))
- {
- int tt;
-
- tt =
- ctx->comp.comp_table[ctx->comp.comp_head][0] -
- ctx->target_vcn;
- if (tt > nn)
- tt = nn;
- ctx->target_vcn += tt;
- if (buf)
- {
- if (grub_disk_read
- (ctx->comp.disk,
- (ctx->comp.comp_table[ctx->comp.comp_head][1] -
- (ctx->comp.comp_table[ctx->comp.comp_head][0] -
- ctx->target_vcn)) * ctx->comp.spc, 0,
- tt * (ctx->comp.spc << BLK_SHR), buf))
- return grub_errno;
- buf += tt * (ctx->comp.spc << BLK_SHR);
- }
- nn -= tt;
- if (ctx->target_vcn >=
- ctx->comp.comp_table[ctx->comp.comp_head][0])
- ctx->comp.comp_head++;
- }
- if (nn)
- {
- if (buf)
- {
- if (grub_disk_read
- (ctx->comp.disk,
- (ctx->target_vcn - ctx->curr_vcn +
- ctx->curr_lcn) * ctx->comp.spc, 0,
- nn * (ctx->comp.spc << BLK_SHR), buf))
- return grub_errno;
- buf += nn * (ctx->comp.spc << BLK_SHR);
- }
- ctx->target_vcn += nn;
- }
- }
- }
- return 0;
-}
-
static int
grub_ntfs_read_block (grub_fshelp_node_t node, int block)
{
struct grub_ntfs_rlst *ctx;
ctx = (struct grub_ntfs_rlst *) node;
- if ((unsigned long) block >= ctx->next_vcn)
+ if ((grub_uint32_t) block >= ctx->next_vcn)
{
- if (read_run_list (ctx))
+ if (grub_ntfs_read_run_list (ctx))
return -1;
return ctx->curr_lcn;
}
else
- return (ctx->flags & RF_BLNK) ? 0 : ((unsigned long) block -
+ return (ctx->flags & RF_BLNK) ? 0 : ((grub_uint32_t) block -
ctx->curr_vcn + ctx->curr_lcn);
}
static grub_err_t
-read_data (struct grub_ntfs_attr *at, char *pa, char *dest, unsigned long ofs,
- unsigned long len, int cached,
+read_data (struct grub_ntfs_attr *at, char *pa, char *dest, grub_uint32_t ofs,
+ grub_uint32_t len, int cached,
void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector,
unsigned offset,
unsigned length))
{
- unsigned long vcn;
+ grub_uint32_t vcn;
struct grub_ntfs_rlst cc, *ctx;
- grub_err_t ret;
if (len == 0)
return 0;
@@ -803,7 +392,7 @@ read_data (struct grub_ntfs_attr *at, ch
{
if ((ofs & (~(COM_LEN - 1))) == at->save_pos)
{
- unsigned long n;
+ grub_uint32_t n;
n = COM_LEN - (ofs - at->save_pos);
if (n > len)
@@ -836,13 +425,13 @@ read_data (struct grub_ntfs_attr *at, ch
ctx->curr_lcn = 0;
while (ctx->next_vcn <= ctx->target_vcn)
{
- if (read_run_list (ctx))
+ if (grub_ntfs_read_run_list (ctx))
return grub_errno;
}
if (at->flags & AF_GPOS)
{
- unsigned long st0, st1;
+ grub_uint32_t st0, st1;
st0 =
(ctx->target_vcn - ctx->curr_vcn + ctx->curr_lcn) * ctx->comp.spc +
@@ -851,7 +440,7 @@ read_data (struct grub_ntfs_attr *at, ch
if (st1 ==
(ctx->next_vcn - ctx->curr_vcn + ctx->curr_lcn) * ctx->comp.spc)
{
- if (read_run_list (ctx))
+ if (grub_ntfs_read_run_list (ctx))
return grub_errno;
st1 = ctx->curr_lcn * ctx->comp.spc;
}
@@ -871,81 +460,14 @@ read_data (struct grub_ntfs_attr *at, ch
return grub_errno;
}
- ctx->comp.comp_head = ctx->comp.comp_tail = 0;
- ctx->comp.cbuf = grub_malloc ((ctx->comp.spc) << BLK_SHR);
- if (!ctx->comp.cbuf)
- return 0;
-
- ret = 0;
-
- //ctx->comp.disk->read_hook = read_hook;
-
- if ((vcn > ctx->target_vcn) &&
- (read_block
- (ctx, NULL, ((vcn - ctx->target_vcn) * ctx->comp.spc) / COM_SEC)))
- {
- ret = grub_errno;
- goto quit;
- }
-
- if (ofs % COM_LEN)
- {
- unsigned long t, n, o;
-
- t = ctx->target_vcn * (ctx->comp.spc << BLK_SHR);
- if (read_block (ctx, at->sbuf, 1))
- {
- ret = grub_errno;
- goto quit;
- }
-
- at->save_pos = t;
-
- o = ofs % COM_LEN;
- n = COM_LEN - o;
- if (n > len)
- n = len;
- grub_memcpy (dest, &at->sbuf[o], n);
- if (n == len)
- goto quit;
- dest += n;
- len -= n;
- }
-
- if (read_block (ctx, dest, len / COM_LEN))
- {
- ret = grub_errno;
- goto quit;
- }
-
- dest += (len / COM_LEN) * COM_LEN;
- len = len % COM_LEN;
- if (len)
- {
- unsigned long t;
-
- t = ctx->target_vcn * (ctx->comp.spc << BLK_SHR);
- if (read_block (ctx, at->sbuf, 1))
- {
- ret = grub_errno;
- goto quit;
- }
-
- at->save_pos = t;
-
- grub_memcpy (dest, at->sbuf, len);
- }
-
-quit:
- //ctx->comp.disk->read_hook = 0;
- if (ctx->comp.cbuf)
- grub_free (ctx->comp.cbuf);
- return ret;
+ return (grub_ntfscomp_func) ? grub_ntfscomp_func (at, dest, ofs, len, ctx,
+ vcn) :
+ grub_error (GRUB_ERR_BAD_FS, "ntfscomp module not loaded");
}
static grub_err_t
-read_attr (struct grub_ntfs_attr *at, char *dest, unsigned long ofs,
- unsigned long len, int cached,
+read_attr (struct grub_ntfs_attr *at, char *dest, grub_uint32_t ofs,
+ grub_uint32_t len, int cached,
void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector,
unsigned offset,
unsigned length))
@@ -961,7 +483,7 @@ read_attr (struct grub_ntfs_attr *at, ch
if (at->flags & AF_ALST)
{
char *pa;
- unsigned long vcn;
+ grub_uint32_t vcn;
vcn = ofs / (at->mft->data->spc << BLK_SHR);
pa = at->attr_nxt + u16at (at->attr_nxt, 4);
@@ -987,7 +509,7 @@ read_attr (struct grub_ntfs_attr *at, ch
}
static grub_err_t
-read_mft (struct grub_ntfs_data *data, char *buf, unsigned long mftno)
+read_mft (struct grub_ntfs_data *data, char *buf, grub_uint32_t mftno)
{
if (read_attr
(&data->mmft.attr, buf, mftno * (data->mft_size << BLK_SHR),
@@ -1220,14 +742,14 @@ grub_ntfs_iterate_dir (grub_fshelp_node_
if (bitmap)
{
- unsigned long v, i;
+ grub_uint32_t v, i;
indx = grub_malloc (mft->data->idx_size << BLK_SHR);
if (indx == NULL)
goto done;
v = 1;
- for (i = 0; i < (unsigned long) bitmap_len * 8; i++)
+ for (i = 0; i < (grub_uint32_t) bitmap_len * 8; i++)
{
if (*bitmap & v)
{
Index: fs/ntfscomp.c
===================================================================
RCS file: /sources/grub/grub2/fs/ntfscomp.c,v
diff -Nu fs/ntfscomp.c
--- /dev/null 2007-11-30 08:59:18.260044737 +0800
+++ fs/ntfscomp.c 2007-11-30 02:02:44.328125000 +0800
@@ -0,0 +1,375 @@
+/* ntfscomp.c - compression support for the NTFS filesystem */
+/*
+ * Copyright (C) 2007 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/file.h>
+#include <grub/mm.h>
+#include <grub/misc.h>
+#include <grub/disk.h>
+#include <grub/dl.h>
+#include <grub/fshelp.h>
+#include <grub/ntfs.h>
+
+static grub_err_t
+decomp_nextvcn (struct grub_ntfs_comp *cc)
+{
+ if (cc->comp_head >= cc->comp_tail)
+ return grub_error (GRUB_ERR_BAD_FS, "Compression block overflown");
+ if (grub_disk_read
+ (cc->disk,
+ (cc->comp_table[cc->comp_head][1] -
+ (cc->comp_table[cc->comp_head][0] - cc->cbuf_vcn)) * cc->spc, 0,
+ cc->spc << BLK_SHR, cc->cbuf))
+ return grub_errno;
+ cc->cbuf_vcn++;
+ if ((cc->cbuf_vcn >= cc->comp_table[cc->comp_head][0]))
+ cc->comp_head++;
+ cc->cbuf_ofs = 0;
+ return 0;
+}
+
+static grub_err_t
+decomp_getch (struct grub_ntfs_comp *cc, unsigned char *res)
+{
+ if (cc->cbuf_ofs >= (cc->spc << BLK_SHR))
+ {
+ if (decomp_nextvcn (cc))
+ return grub_errno;
+ }
+ *res = (unsigned char) cc->cbuf[cc->cbuf_ofs++];
+ return 0;
+}
+
+static grub_err_t
+decomp_get16 (struct grub_ntfs_comp *cc, grub_uint16_t * res)
+{
+ unsigned char c1, c2;
+
+ if ((decomp_getch (cc, &c1)) || (decomp_getch (cc, &c2)))
+ return grub_errno;
+ *res = ((grub_uint16_t) c2) * 256 + ((grub_uint16_t) c1);
+ return 0;
+}
+
+/* Decompress a block (4096 bytes) */
+static grub_err_t
+decomp_block (struct grub_ntfs_comp *cc, char *dest)
+{
+ grub_uint16_t flg, cnt;
+
+ if (decomp_get16 (cc, &flg))
+ return grub_errno;
+ cnt = (flg & 0xFFF) + 1;
+
+ if (dest)
+ {
+ if (flg & 0x8000)
+ {
+ unsigned char tag;
+ grub_uint32_t bits, copied;
+
+ bits = copied = tag = 0;
+ while (cnt > 0)
+ {
+ if (copied > COM_LEN)
+ return grub_error (GRUB_ERR_BAD_FS,
+ "Compression block too large");
+
+ if (!bits)
+ {
+ if (decomp_getch (cc, &tag))
+ return grub_errno;
+
+ bits = 8;
+ cnt--;
+ if (cnt <= 0)
+ break;
+ }
+ if (tag & 1)
+ {
+ grub_uint32_t i, len, delta, code, lmask, dshift;
+ grub_uint16_t word;
+
+ if (decomp_get16 (cc, &word))
+ return grub_errno;
+
+ code = word;
+ cnt -= 2;
+
+ if (!copied)
+ {
+ grub_error (GRUB_ERR_BAD_FS, "Context window empty");
+ 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
+ {
+ unsigned char ch;
+
+ if (decomp_getch (cc, &ch))
+ return grub_errno;
+ dest[copied++] = ch;
+ cnt--;
+ }
+ tag >>= 1;
+ bits--;
+ }
+ return 0;
+ }
+ else
+ {
+ if (cnt != COM_LEN)
+ return grub_error (GRUB_ERR_BAD_FS,
+ "Invalid compression block size");
+ }
+ }
+
+ while (cnt > 0)
+ {
+ int n;
+
+ n = (cc->spc << BLK_SHR) - cc->cbuf_ofs;
+ if (n > cnt)
+ n = cnt;
+ if ((dest) && (n))
+ {
+ memcpy (dest, &cc->cbuf[cc->cbuf_ofs], n);
+ dest += n;
+ }
+ cnt -= n;
+ cc->cbuf_ofs += n;
+ if ((cnt) && (decomp_nextvcn (cc)))
+ return grub_errno;
+ }
+ return 0;
+}
+
+static grub_err_t
+read_block (struct grub_ntfs_rlst *ctx, char *buf, int num)
+{
+ int cpb = COM_SEC / ctx->comp.spc;
+
+ while (num)
+ {
+ int nn;
+
+ if ((ctx->target_vcn & 0xF) == 0)
+ {
+
+ if (ctx->comp.comp_head != ctx->comp.comp_tail)
+ return grub_error (GRUB_ERR_BAD_FS, "Invalid compression block");
+ ctx->comp.comp_head = ctx->comp.comp_tail = 0;
+ ctx->comp.cbuf_vcn = ctx->target_vcn;
+ ctx->comp.cbuf_ofs = (ctx->comp.spc << BLK_SHR);
+ if (ctx->target_vcn >= ctx->next_vcn)
+ {
+ if (grub_ntfs_read_run_list (ctx))
+ return grub_errno;
+ }
+ while (ctx->target_vcn + 16 > ctx->next_vcn)
+ {
+ if (ctx->flags & RF_BLNK)
+ break;
+ ctx->comp.comp_table[ctx->comp.comp_tail][0] = ctx->next_vcn;
+ ctx->comp.comp_table[ctx->comp.comp_tail][1] =
+ ctx->curr_lcn + ctx->next_vcn - ctx->curr_vcn;
+ ctx->comp.comp_tail++;
+ if (grub_ntfs_read_run_list (ctx))
+ return grub_errno;
+ }
+ }
+
+ nn = (16 - (ctx->target_vcn & 0xF)) / cpb;
+ if (nn > num)
+ nn = num;
+ num -= nn;
+
+ if (ctx->flags & RF_BLNK)
+ {
+ ctx->target_vcn += nn * cpb;
+ if (ctx->comp.comp_tail == 0)
+ {
+ if (buf)
+ {
+ grub_memset (buf, 0, nn * COM_LEN);
+ buf += nn * COM_LEN;
+ }
+ }
+ else
+ {
+ while (nn)
+ {
+ if (decomp_block (&ctx->comp, buf))
+ return grub_errno;
+ if (buf)
+ buf += COM_LEN;
+ nn--;
+ }
+ }
+ }
+ else
+ {
+ nn *= cpb;
+ while ((ctx->comp.comp_head < ctx->comp.comp_tail) && (nn))
+ {
+ int tt;
+
+ tt =
+ ctx->comp.comp_table[ctx->comp.comp_head][0] -
+ ctx->target_vcn;
+ if (tt > nn)
+ tt = nn;
+ ctx->target_vcn += tt;
+ if (buf)
+ {
+ if (grub_disk_read
+ (ctx->comp.disk,
+ (ctx->comp.comp_table[ctx->comp.comp_head][1] -
+ (ctx->comp.comp_table[ctx->comp.comp_head][0] -
+ ctx->target_vcn)) * ctx->comp.spc, 0,
+ tt * (ctx->comp.spc << BLK_SHR), buf))
+ return grub_errno;
+ buf += tt * (ctx->comp.spc << BLK_SHR);
+ }
+ nn -= tt;
+ if (ctx->target_vcn >=
+ ctx->comp.comp_table[ctx->comp.comp_head][0])
+ ctx->comp.comp_head++;
+ }
+ if (nn)
+ {
+ if (buf)
+ {
+ if (grub_disk_read
+ (ctx->comp.disk,
+ (ctx->target_vcn - ctx->curr_vcn +
+ ctx->curr_lcn) * ctx->comp.spc, 0,
+ nn * (ctx->comp.spc << BLK_SHR), buf))
+ return grub_errno;
+ buf += nn * (ctx->comp.spc << BLK_SHR);
+ }
+ ctx->target_vcn += nn;
+ }
+ }
+ }
+ return 0;
+}
+
+static grub_err_t
+ntfscomp (struct grub_ntfs_attr *at, char *dest, grub_uint32_t ofs,
+ grub_uint32_t len, struct grub_ntfs_rlst *ctx, grub_uint32_t vcn)
+{
+ grub_err_t ret;
+
+ ctx->comp.comp_head = ctx->comp.comp_tail = 0;
+ ctx->comp.cbuf = grub_malloc ((ctx->comp.spc) << BLK_SHR);
+ if (!ctx->comp.cbuf)
+ return 0;
+
+ ret = 0;
+
+ //ctx->comp.disk->read_hook = read_hook;
+
+ if ((vcn > ctx->target_vcn) &&
+ (read_block
+ (ctx, NULL, ((vcn - ctx->target_vcn) * ctx->comp.spc) / COM_SEC)))
+ {
+ ret = grub_errno;
+ goto quit;
+ }
+
+ if (ofs % COM_LEN)
+ {
+ grub_uint32_t t, n, o;
+
+ t = ctx->target_vcn * (ctx->comp.spc << BLK_SHR);
+ if (read_block (ctx, at->sbuf, 1))
+ {
+ ret = grub_errno;
+ goto quit;
+ }
+
+ at->save_pos = t;
+
+ o = ofs % COM_LEN;
+ n = COM_LEN - o;
+ if (n > len)
+ n = len;
+ grub_memcpy (dest, &at->sbuf[o], n);
+ if (n == len)
+ goto quit;
+ dest += n;
+ len -= n;
+ }
+
+ if (read_block (ctx, dest, len / COM_LEN))
+ {
+ ret = grub_errno;
+ goto quit;
+ }
+
+ dest += (len / COM_LEN) * COM_LEN;
+ len = len % COM_LEN;
+ if (len)
+ {
+ grub_uint32_t t;
+
+ t = ctx->target_vcn * (ctx->comp.spc << BLK_SHR);
+ if (read_block (ctx, at->sbuf, 1))
+ {
+ ret = grub_errno;
+ goto quit;
+ }
+
+ at->save_pos = t;
+
+ grub_memcpy (dest, at->sbuf, len);
+ }
+
+quit:
+ //ctx->comp.disk->read_hook = 0;
+ if (ctx->comp.cbuf)
+ grub_free (ctx->comp.cbuf);
+ return ret;
+}
+
+GRUB_MOD_INIT (ntfscomp)
+{
+ (void) mod;
+ grub_ntfscomp_func = ntfscomp;
+}
+
+GRUB_MOD_FINI (ntfscomp)
+{
+ grub_ntfscomp_func = NULL;
+}
Index: include/grub/ntfs.h
===================================================================
RCS file: /sources/grub/grub2/include/grub/ntfs.h,v
diff -Nu include/grub/ntfs.h
--- /dev/null 2007-11-30 08:59:18.260044737 +0800
+++ include/grub/ntfs.h 2007-11-30 01:59:16.031250000 +0800
@@ -0,0 +1,184 @@
+/* ntfs.h - header for the NTFS filesystem */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2007 Free Software Foundation, Inc.
+ *
+ * GRUB 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_NTFS_H
+#define GRUB_NTFS_H 1
+
+#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_OBJECT_ID 0x40
+#define AT_SECURITY_DESCRIPTOR 0x50
+#define AT_VOLUME_NAME 0x60
+#define AT_VOLUME_INFORMATION 0x70
+#define AT_DATA 0x80
+#define AT_INDEX_ROOT 0x90
+#define AT_INDEX_ALLOCATION 0xA0
+#define AT_BITMAP 0xB0
+#define AT_SYMLINK 0xC0
+#define AT_EA_INFORMATION 0xD0
+#define AT_EA 0xE0
+
+#define ATTR_READ_ONLY 0x1
+#define ATTR_HIDDEN 0x2
+#define ATTR_SYSTEM 0x4
+#define ATTR_ARCHIVE 0x20
+#define ATTR_DEVICE 0x40
+#define ATTR_NORMAL 0x80
+#define ATTR_TEMPORARY 0x100
+#define ATTR_SPARSE 0x200
+#define ATTR_REPARSE 0x400
+#define ATTR_COMPRESSED 0x800
+#define ATTR_OFFLINE 0x1000
+#define ATTR_NOT_INDEXED 0x2000
+#define ATTR_ENCRYPTED 0x4000
+#define ATTR_DIRECTORY 0x10000000
+#define ATTR_INDEX_VIEW 0x20000000
+
+#define FLAG_COMPRESSED 1
+#define FLAG_ENCRYPTED 0x4000
+#define FLAG_SPARSE 0x8000
+
+#define BLK_SHR GRUB_DISK_SECTOR_BITS
+
+#define MAX_MFT (1024 >> BLK_SHR)
+#define MAX_IDX (16384 >> BLK_SHR)
+#define MAX_SPC (4096 >> BLK_SHR)
+
+#define COM_LEN 4096
+#define COM_SEC (COM_LEN >> BLK_SHR)
+
+#define BMP_LEN 4096
+
+#define AF_ALST 1
+#define AF_MMFT 2
+#define AF_GPOS 4
+
+#define RF_COMP 1
+#define RF_CBLK 2
+#define RF_BLNK 4
+
+#define valueat(buf,ofs,type) *((type*)(((char*)buf)+ofs))
+
+#define u16at(buf,ofs) grub_le_to_cpu16(valueat(buf,ofs,grub_uint16_t))
+#define u32at(buf,ofs) grub_le_to_cpu32(valueat(buf,ofs,grub_uint32_t))
+#define u64at(buf,ofs) grub_le_to_cpu64(valueat(buf,ofs,grub_uint64_t))
+
+#define v16at(buf,ofs) valueat(buf,ofs,grub_uint16_t)
+#define v32at(buf,ofs) valueat(buf,ofs,grub_uint32_t)
+#define v64at(buf,ofs) valueat(buf,ofs,grub_uint64_t)
+
+struct grub_ntfs_bpb
+{
+ grub_uint8_t jmp_boot[3];
+ grub_uint8_t oem_name[8];
+ grub_uint16_t bytes_per_sector;
+ grub_uint8_t sectors_per_cluster;
+ grub_uint8_t reserved_1[7];
+ grub_uint8_t media;
+ grub_uint16_t reserved_2;
+ grub_uint16_t sectors_per_track;
+ grub_uint16_t num_heads;
+ grub_uint32_t num_hidden_sectors;
+ grub_uint32_t reserved_3[2];
+ grub_uint64_t num_total_sectors;
+ grub_uint64_t mft_lcn;
+ grub_uint64_t mft_mirr_lcn;
+ grub_int8_t clusters_per_mft;
+ grub_int8_t reserved_4[3];
+ grub_int8_t clusters_per_index;
+ grub_int8_t reserved_5[3];
+ grub_uint64_t serial_number;
+ grub_uint32_t checksum;
+} __attribute__ ((packed));
+
+#define grub_ntfs_file grub_fshelp_node
+
+struct grub_ntfs_attr
+{
+ int flags;
+ char *emft_buf, *edat_buf;
+ char *attr_cur, *attr_nxt, *attr_end;
+ grub_uint32_t save_pos;
+ char *sbuf;
+ struct grub_ntfs_file *mft;
+};
+
+struct grub_fshelp_node
+{
+ struct grub_ntfs_data *data;
+ char *buf;
+ grub_uint32_t size;
+ grub_uint32_t ino;
+ int inode_read;
+ struct grub_ntfs_attr attr;
+};
+
+struct grub_ntfs_data
+{
+ struct grub_ntfs_file cmft;
+ struct grub_ntfs_file mmft;
+ grub_disk_t disk;
+ grub_uint32_t mft_size;
+ grub_uint32_t idx_size;
+ grub_uint32_t spc;
+ grub_uint32_t blocksize;
+ grub_uint32_t mft_start;
+};
+
+struct grub_ntfs_comp
+{
+ grub_disk_t disk;
+ int comp_head, comp_tail;
+ grub_uint32_t comp_table[16][2];
+ grub_uint32_t cbuf_ofs, cbuf_vcn, spc;
+ char *cbuf;
+};
+
+struct grub_ntfs_rlst
+{
+ int flags;
+ grub_uint32_t target_vcn, curr_vcn, next_vcn, curr_lcn;
+ char *cur_run;
+ struct grub_ntfs_attr *attr;
+ struct grub_ntfs_comp comp;
+};
+
+typedef grub_err_t (*ntfscomp_func_t) (struct grub_ntfs_attr * at, char *dest,
+ grub_uint32_t ofs, grub_uint32_t len,
+ struct grub_ntfs_rlst * ctx,
+ grub_uint32_t vcn);
+
+extern ntfscomp_func_t EXPORT_VAR (grub_ntfscomp_func);
+
+grub_err_t EXPORT_FUNC(grub_ntfs_read_run_list) (struct grub_ntfs_rlst *ctx);
+
+#endif /* ! GRUB_NTFS_H */