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Re: NTFS file system driver (update 4)
|
From: |
Bean |
|
Subject: |
Re: NTFS file system driver (update 4) |
|
Date: |
Fri, 3 Aug 2007 02:52:00 +0800 |
On 8/3/07, Marco Gerards <address@hidden> wrote:
> Bean <address@hidden> writes:
>
> Hi,
>
> >> - You have unclear errors like "B2". Can you improve those so I know
> >> what went wrong if I get such error?
> >
> > I'm sorry, I forget to change this one.
>
> I would have done that, but I really have no idea how to change that
> :-). Can you please change these?
>
> >> - Clean up the list of include files
> >
> > I think these two can be omit:
> >
> > #include <grub/err.h>
> > #include <grub/types.h>
>
> Ok.
>
> If you make these two changes and send in the patch, I'll commit the
> patch.
>
Ok, this is the new patch.
--
Bean
2007-08-02 Bean <address@hidden>
* conf/common.rmk (pkgdata_MODULES): Add ntfs.mod.
(ntfs_mod_SOURCES): New variable.
(ntfs_mod_CFLAGS): Likewise.
(ntfs_mod_LDFLAGS): Likewise.
* conf/i386-pc.rmk (grub_setup_SOURCES): Add fs/ntfs.c.
(grub_probe_SOURCES): Likewise.
(grub_emu_SOURCES): Likewise.
* conf/i386-efi.rmk (grub_probe_SOURCES): Add fs/ntfs.c.
(grub_emu_SOURCES): Likewise.
* conf/powerpc-ieee1275.rmk (grub_probe_SOURCES): Add fs/ntfs.c.
(grub_emu_SOURCES): Likewise.
* conf/misc.c (grub_utf16_to_utf8): Fix unicode conversion bug.
* fs/ntfs.c: New file.
Index: conf/common.rmk
===================================================================
RCS file: /sources/grub/grub2/conf/common.rmk,v
retrieving revision 1.15
diff -u -p -r1.15 common.rmk
--- conf/common.rmk 22 Jul 2007 19:17:22 -0000 1.15
+++ conf/common.rmk 28 Jul 2007 15:45:20 -0000
@@ -79,7 +79,7 @@ update-grub_DATA += util/grub.d/README
# Filing systems.
-pkgdata_MODULES += fshelp.mod fat.mod ufs.mod ext2.mod \
+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
@@ -103,6 +103,11 @@ ext2_mod_SOURCES = fs/ext2.c
ext2_mod_CFLAGS = $(COMMON_CFLAGS)
ext2_mod_LDFLAGS = $(COMMON_LDFLAGS)
+# For ntfs.mod.
+ntfs_mod_SOURCES = fs/ntfs.c
+ntfs_mod_CFLAGS = $(COMMON_CFLAGS)
+ntfs_mod_LDFLAGS = $(COMMON_LDFLAGS)
+
# For minix.mod.
minix_mod_SOURCES = fs/minix.c
minix_mod_CFLAGS = $(COMMON_CFLAGS)
Index: conf/i386-pc.rmk
===================================================================
RCS file: /sources/grub/grub2/conf/i386-pc.rmk,v
retrieving revision 1.84
diff -u -p -r1.84 i386-pc.rmk
--- conf/i386-pc.rmk 25 Jul 2007 00:44:00 -0000 1.84
+++ conf/i386-pc.rmk 28 Jul 2007 15:45:21 -0000
@@ -67,7 +67,7 @@ grub_setup_SOURCES = util/i386/pc/grub-s
util/misc.c util/getroot.c kern/device.c kern/disk.c \
kern/err.c kern/misc.c fs/fat.c fs/ext2.c fs/xfs.c fs/affs.c \
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 \
+ 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
@@ -81,7 +81,7 @@ grub_probe_SOURCES = util/grub-probe.c \
kern/device.c kern/disk.c kern/err.c kern/misc.c fs/fat.c \
fs/ext2.c kern/parser.c kern/partition.c \
partmap/pc.c partmap/apple.c partmap/gpt.c \
- fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c kern/fs.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
@@ -97,6 +97,7 @@ grub_emu_SOURCES = commands/boot.c comma
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 \
io/gzio.c \
kern/device.c kern/disk.c kern/dl.c kern/elf.c kern/env.c \
kern/err.c \
Index: conf/i386-efi.rmk
===================================================================
RCS file: /sources/grub/grub2/conf/i386-efi.rmk,v
retrieving revision 1.18
diff -u -p -r1.18 i386-efi.rmk
--- conf/i386-efi.rmk 22 Jul 2007 19:17:24 -0000 1.18
+++ conf/i386-efi.rmk 28 Jul 2007 15:45:21 -0000
@@ -33,7 +33,7 @@ grub_probe_SOURCES = util/grub-probe.c \
kern/device.c kern/disk.c kern/err.c kern/misc.c fs/fat.c \
fs/ext2.c kern/parser.c kern/partition.c \
partmap/pc.c partmap/apple.c partmap/gpt.c \
- fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c kern/fs.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
@@ -49,6 +49,7 @@ 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 \
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 1.68
diff -u -p -r1.68 powerpc-ieee1275.rmk
--- conf/powerpc-ieee1275.rmk 25 Jul 2007 00:44:00 -0000 1.68
+++ conf/powerpc-ieee1275.rmk 28 Jul 2007 15:45:21 -0000
@@ -45,7 +45,7 @@ grub_probe_SOURCES = util/grub-probe.c \
kern/device.c kern/disk.c kern/err.c kern/misc.c fs/fat.c \
fs/ext2.c kern/parser.c kern/partition.c \
partmap/pc.c partmap/apple.c partmap/gpt.c \
- fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c kern/fs.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
@@ -60,6 +60,7 @@ 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 \
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: kern/misc.c
===================================================================
RCS file: /sources/grub/grub2/kern/misc.c,v
retrieving revision 1.35
diff -u -p -r1.35 misc.c
--- kern/misc.c 21 Jul 2007 23:32:26 -0000 1.35
+++ kern/misc.c 28 Jul 2007 15:45:22 -0000
@@ -960,8 +960,8 @@ grub_utf16_to_utf8 (grub_uint8_t *dest,
}
else
{
- *dest++ = (code >> 16) | 0xE0;
- *dest++ = ((code >> 12) & 0x3F) | 0x80;
+ *dest++ = (code >> 12) | 0xE0;
+ *dest++ = ((code >> 6) & 0x3F) | 0x80;
*dest++ = (code & 0x3F) | 0x80;
}
}
Index: fs/ntfs.c
===================================================================
RCS file: /sources/grub/grub2/fs/ntfs.c,v
diff -Nu fs/ntfs.c
--- /dev/null 2007-08-03 01:58:02.570000000 +0800
+++ fs/ntfs.c 2007-08-03 02:43:59.000000000 +0800
@@ -0,0 +1,1584 @@
+/* ntfs.c - NTFS filesystem */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * 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>
+
+#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;
+};
+
+#ifndef GRUB_UTIL
+static grub_dl_t my_mod;
+#endif
+
+static grub_err_t
+fixup (struct grub_ntfs_data *data, char *buf, int len, char *magic)
+{
+ int ss;
+ char *pu;
+ unsigned us;
+
+ if (grub_memcmp (buf, magic, 4))
+ return grub_error (GRUB_ERR_BAD_FS, "%s label not found", magic);
+
+ ss = u16at (buf, 6) - 1;
+ if (ss * (int) data->blocksize != len * GRUB_DISK_SECTOR_SIZE)
+ return grub_error (GRUB_ERR_BAD_FS, "Size not match",
+ ss * (int) data->blocksize,
+ len * GRUB_DISK_SECTOR_SIZE);
+ pu = buf + u16at (buf, 4);
+ us = u16at (pu, 0);
+ buf -= 2;
+ while (ss > 0)
+ {
+ buf += data->blocksize;
+ pu += 2;
+ if (u16at (buf, 0) != us)
+ return grub_error (GRUB_ERR_BAD_FS, "Fixup signature not match");
+ v16at (buf, 0) = v16at (pu, 0);
+ ss--;
+ }
+
+ return 0;
+}
+
+static grub_err_t read_mft (struct grub_ntfs_data *data, char *buf,
+ unsigned long mftno);
+static grub_err_t read_attr (struct grub_ntfs_attr *at, char *dest,
+ unsigned long ofs, unsigned long len,
+ int cached,
+ void
+ NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t
+ sector,
+ unsigned offset,
+ unsigned length));
+
+static grub_err_t read_data (struct grub_ntfs_attr *at, char *pa, char *dest,
+ unsigned long ofs, unsigned long len,
+ int cached,
+ void
+ NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t
+ sector,
+ unsigned offset,
+ unsigned length));
+
+static void
+init_attr (struct grub_ntfs_attr *at, struct grub_ntfs_file *mft)
+{
+ at->mft = mft;
+ at->flags = (mft == &mft->data->mmft) ? AF_MMFT : 0;
+ at->attr_nxt = mft->buf + u16at (mft->buf, 0x14);
+ at->attr_end = at->emft_buf = at->edat_buf = at->sbuf = NULL;
+}
+
+static void
+free_attr (struct grub_ntfs_attr *at)
+{
+ grub_free (at->emft_buf);
+ grub_free (at->edat_buf);
+ grub_free (at->sbuf);
+}
+
+static char *
+find_attr (struct grub_ntfs_attr *at, unsigned char attr)
+{
+ if (at->flags & AF_ALST)
+ {
+ retry:
+ while (at->attr_nxt < at->attr_end)
+ {
+ at->attr_cur = at->attr_nxt;
+ at->attr_nxt += u16at (at->attr_cur, 4);
+ if (((unsigned char) *at->attr_cur == attr) || (attr == 0))
+ {
+ char *new_pos;
+
+ if (at->flags & AF_MMFT)
+ {
+ if ((grub_disk_read
+ (at->mft->data->disk, v32at (at->attr_cur, 0x10), 0,
+ 512, at->emft_buf))
+ ||
+ (grub_disk_read
+ (at->mft->data->disk, v32at (at->attr_cur, 0x14), 0,
+ 512, at->emft_buf + 512)))
+ return NULL;
+
+ if (fixup
+ (at->mft->data, at->emft_buf, at->mft->data->mft_size,
+ "FILE"))
+ return NULL;
+ }
+ else
+ {
+ if (read_mft (at->mft->data, at->emft_buf,
+ u32at (at->attr_cur, 0x10)))
+ return NULL;
+ }
+
+ new_pos = &at->emft_buf[u16at (at->emft_buf, 0x14)];
+ while ((unsigned char) *new_pos != 0xFF)
+ {
+ if (((unsigned char) *new_pos ==
+ (unsigned char) *at->attr_cur)
+ && (u16at (new_pos, 0xE) == u16at (at->attr_cur, 0x18)))
+ {
+ return new_pos;
+ }
+ new_pos += u16at (new_pos, 4);
+ }
+ grub_error (GRUB_ERR_BAD_FS,
+ "Can\'t find 0x%X in attribute list",
+ (unsigned char) *at->attr_cur);
+ return NULL;
+ }
+ }
+ return NULL;
+ }
+ at->attr_cur = at->attr_nxt;
+ while ((unsigned char) *at->attr_cur != 0xFF)
+ {
+ at->attr_nxt += u16at (at->attr_cur, 4);
+ if ((unsigned char) *at->attr_cur == AT_ATTRIBUTE_LIST)
+ at->attr_end = at->attr_cur;
+ if (((unsigned char) *at->attr_cur == attr) || (attr == 0))
+ return at->attr_cur;
+ at->attr_cur = at->attr_nxt;
+ }
+ if (at->attr_end)
+ {
+ char *pa;
+
+ at->emft_buf = grub_malloc (at->mft->data->mft_size << BLK_SHR);
+ if (at->emft_buf == NULL)
+ return NULL;
+
+ pa = at->attr_end;
+ if (pa[8])
+ {
+ if (u32at (pa, 0x28) > 4096)
+ {
+ grub_error (GRUB_ERR_BAD_FS,
+ "Non-resident attribute list too large");
+ return NULL;
+ }
+ at->attr_cur = at->attr_end;
+ at->edat_buf = grub_malloc (u32at (pa, 0x28));
+ if (!at->edat_buf)
+ return NULL;
+ if (read_data (at, pa, at->edat_buf, 0, u32at (pa, 0x28), 0, 0))
+ {
+ grub_error (GRUB_ERR_BAD_FS,
+ "Fail to read non-resident attribute list");
+ return NULL;
+ }
+ at->attr_nxt = at->edat_buf;
+ at->attr_end = at->edat_buf + u32at (pa, 0x30);
+ }
+ else
+ {
+ at->attr_nxt = at->attr_end + u16at (pa, 0x14);
+ at->attr_end = at->attr_end + u32at (pa, 4);
+ }
+ at->flags |= AF_ALST;
+ while (at->attr_nxt < at->attr_end)
+ {
+ if (((unsigned char) *at->attr_nxt == attr) || (attr == 0))
+ break;
+ at->attr_nxt += u16at (at->attr_nxt, 4);
+ }
+ if (at->attr_nxt >= at->attr_end)
+ return NULL;
+
+ if ((at->flags & AF_MMFT) && (attr == AT_DATA))
+ {
+ at->flags |= AF_GPOS;
+ at->attr_cur = at->attr_nxt;
+ pa = at->attr_cur;
+ v32at (pa, 0x10) = at->mft->data->mft_start;
+ v32at (pa, 0x14) = at->mft->data->mft_start + 1;
+ pa = at->attr_nxt + u16at (pa, 4);
+ while (pa < at->attr_end)
+ {
+ if ((unsigned char) *pa != attr)
+ break;
+ if (read_attr
+ (at, pa + 0x10,
+ u32at (pa, 0x10) * (at->mft->data->mft_size << BLK_SHR),
+ at->mft->data->mft_size << BLK_SHR, 0, 0))
+ return NULL;
+ pa += u16at (pa, 4);
+ }
+ at->attr_nxt = at->attr_cur;
+ at->flags &= ~AF_GPOS;
+ }
+ goto retry;
+ }
+ return NULL;
+}
+
+static char *
+locate_attr (struct grub_ntfs_attr *at, struct grub_ntfs_file *mft,
+ unsigned char attr)
+{
+ char *pa;
+
+ init_attr (at, mft);
+ if ((pa = find_attr (at, attr)) == NULL)
+ return NULL;
+ if ((at->flags & AF_ALST) == 0)
+ {
+ while (1)
+ {
+ if ((pa = find_attr (at, attr)) == NULL)
+ break;
+ if (at->flags & AF_ALST)
+ return pa;
+ }
+ grub_errno = GRUB_ERR_NONE;
+ free_attr (at);
+ init_attr (at, mft);
+ pa = find_attr (at, attr);
+ }
+ return pa;
+}
+
+static char *
+read_run_data (char *run, int nn, unsigned long *val, int sig)
+{
+ unsigned long r, v;
+
+ r = 0;
+ v = 1;
+
+ while (nn--)
+ {
+ r += v * (*(unsigned char *) (run++));
+ v <<= 8;
+ }
+
+ if ((sig) && (r & (v >> 1)))
+ r -= v;
+
+ *val = r;
+ return run;
+}
+
+static grub_err_t
+read_run_list (struct grub_ntfs_rlst *ctx)
+{
+ int c1, c2;
+ unsigned long val;
+ char *run;
+
+ run = ctx->cur_run;
+retry:
+ c1 = ((unsigned char) (*run) & 0xF);
+ c2 = ((unsigned char) (*run) >> 4);
+ if (!c1)
+ {
+ if ((ctx->attr) && (ctx->attr->flags & AF_ALST))
+ {
+ void NESTED_FUNC_ATTR (*save_hook) (grub_disk_addr_t sector,
+ unsigned offset,
+ unsigned length);
+
+ save_hook = ctx->comp.disk->read_hook;
+ ctx->comp.disk->read_hook = 0;
+ run = find_attr (ctx->attr, (unsigned char) *ctx->attr->attr_cur);
+ ctx->comp.disk->read_hook = save_hook;
+ if (run)
+ {
+ if (run[8] == 0)
+ return grub_error (GRUB_ERR_BAD_FS,
+ "$DATA should be non-resident");
+
+ run += u16at (run, 0x20);
+ ctx->curr_lcn = 0;
+ goto retry;
+ }
+ }
+ return grub_error (GRUB_ERR_BAD_FS, "Run list overflown");
+ }
+ run = read_run_data (run + 1, c1, &val, 0); /* length of current VCN */
+ ctx->curr_vcn = ctx->next_vcn;
+ ctx->next_vcn += val;
+ run = read_run_data (run, c2, &val, 1); /* offset to previous LCN */
+ ctx->curr_lcn += val;
+ if (val == 0)
+ ctx->flags |= RF_BLNK;
+ else
+ ctx->flags &= ~RF_BLNK;
+ ctx->cur_run = run;
+ 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;
+ }
+ if (ctx->target_vcn + 16 < ctx->next_vcn)
+ return grub_error (GRUB_ERR_BAD_FS,
+ "Compression block should be 16 sector long");
+ }
+
+ 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->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 (read_run_list (ctx))
+ return -1;
+ return ctx->curr_lcn;
+ }
+ else
+ return (ctx->flags & RF_BLNK) ? 0 : ((unsigned long) 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,
+ void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector,
+ unsigned offset,
+ unsigned length))
+{
+ unsigned long vcn;
+ struct grub_ntfs_rlst cc, *ctx;
+ grub_err_t ret;
+
+ if (len == 0)
+ return 0;
+
+ grub_memset (&cc, 0, sizeof (cc));
+ ctx = &cc;
+ ctx->attr = at;
+ ctx->comp.spc = at->mft->data->spc;
+ ctx->comp.disk = at->mft->data->disk;
+
+ if (pa[8] == 0)
+ {
+ if (ofs + len > u32at (pa, 0x10))
+ return grub_error (GRUB_ERR_BAD_FS, "Read out of range");
+ grub_memcpy (dest, pa + u32at (pa, 0x14) + ofs, len);
+ return 0;
+ }
+
+ if (u16at (pa, 0xC) & FLAG_COMPRESSED)
+ ctx->flags |= RF_COMP;
+ else
+ ctx->flags &= ~RF_COMP;
+ ctx->cur_run = pa + u16at (pa, 0x20);
+
+ if (ctx->flags & RF_COMP)
+ {
+ if (!cached)
+ return grub_error (GRUB_ERR_BAD_FS, "Attribute can\'t be compressed");
+
+ if (at->sbuf)
+ {
+ if ((ofs & (~(COM_LEN - 1))) == at->save_pos)
+ {
+ unsigned long n;
+
+ n = COM_LEN - (ofs - at->save_pos);
+ if (n > len)
+ n = len;
+
+ grub_memcpy (dest, at->sbuf + ofs - at->save_pos, n);
+ if (n == len)
+ return 0;
+
+ dest += n;
+ len -= n;
+ ofs += n;
+ }
+ }
+ else
+ {
+ at->sbuf = grub_malloc (COM_LEN);
+ if (at->sbuf == NULL)
+ return grub_errno;
+ at->save_pos = 1;
+ }
+
+ vcn = ctx->target_vcn = (ofs / COM_LEN) * (COM_SEC / ctx->comp.spc);
+ ctx->target_vcn &= ~0xF;
+ }
+ else
+ vcn = ctx->target_vcn = (ofs >> BLK_SHR) / ctx->comp.spc;
+
+ ctx->next_vcn = u32at (pa, 0x10);
+ ctx->curr_lcn = 0;
+ while (ctx->next_vcn <= ctx->target_vcn)
+ {
+ if (read_run_list (ctx))
+ return grub_errno;
+ }
+
+ if (at->flags & AF_GPOS)
+ {
+ unsigned long st0, st1;
+
+ st0 =
+ (ctx->target_vcn - ctx->curr_vcn + ctx->curr_lcn) * ctx->comp.spc +
+ ((ofs >> BLK_SHR) % ctx->comp.spc);
+ st1 = st0 + 1;
+ if (st1 ==
+ (ctx->next_vcn - ctx->curr_vcn + ctx->curr_lcn) * ctx->comp.spc)
+ {
+ if (read_run_list (ctx))
+ return grub_errno;
+ st1 = ctx->curr_lcn * ctx->comp.spc;
+ }
+ v32at (dest, 0) = st0;
+ v32at (dest, 4) = st1;
+ return 0;
+ }
+
+ if (!(ctx->flags & RF_COMP))
+ {
+ unsigned int pow;
+
+ if (!grub_fshelp_log2blksize (ctx->comp.spc, &pow))
+ grub_fshelp_read_file (ctx->comp.disk, (grub_fshelp_node_t) ctx,
+ read_hook, ofs, len, dest,
+ grub_ntfs_read_block, ofs + len, pow);
+ 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;
+}
+
+static grub_err_t
+read_attr (struct grub_ntfs_attr *at, char *dest, unsigned long ofs,
+ unsigned long len, int cached,
+ void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector,
+ unsigned offset,
+ unsigned length))
+{
+ char *save_cur;
+ unsigned char attr;
+ char *pp;
+ grub_err_t ret;
+
+ save_cur = at->attr_cur;
+ at->attr_nxt = at->attr_cur;
+ attr = (unsigned char) *at->attr_nxt;
+ if (at->flags & AF_ALST)
+ {
+ char *pa;
+ unsigned long vcn;
+
+ vcn = ofs / (at->mft->data->spc << BLK_SHR);
+ pa = at->attr_nxt + u16at (at->attr_nxt, 4);
+ while (pa < at->attr_end)
+ {
+ if ((unsigned char) *pa != attr)
+ break;
+ if (u32at (pa, 8) > vcn)
+ break;
+ at->attr_nxt = pa;
+ pa += u16at (pa, 4);
+ }
+ }
+ pp = find_attr (at, attr);
+ if (pp)
+ ret = read_data (at, pp, dest, ofs, len, cached, read_hook);
+ else
+ ret =
+ (grub_errno) ? grub_errno : grub_error (GRUB_ERR_BAD_FS,
+ "Attribute not found");
+ at->attr_cur = save_cur;
+ return ret;
+}
+
+static grub_err_t
+read_mft (struct grub_ntfs_data *data, char *buf, unsigned long mftno)
+{
+ if (read_attr
+ (&data->mmft.attr, buf, mftno * (data->mft_size << BLK_SHR),
+ data->mft_size << BLK_SHR, 0, 0))
+ return grub_error (GRUB_ERR_BAD_FS, "Read MFT 0x%X fails", mftno);
+ return fixup (data, buf, data->mft_size, "FILE");
+}
+
+static grub_err_t
+init_file (struct grub_ntfs_file *mft, grub_uint32_t mftno)
+{
+ unsigned short flag;
+
+ mft->inode_read = 1;
+
+ mft->buf = grub_malloc (mft->data->mft_size << BLK_SHR);
+ if (mft->buf == NULL)
+ return grub_errno;
+
+ if (read_mft (mft->data, mft->buf, mftno))
+ return grub_errno;
+
+ flag = u16at (mft->buf, 0x16);
+ if ((flag & 1) == 0)
+ return grub_error (GRUB_ERR_BAD_FS, "MFT 0x%X is not in use", mftno);
+
+ if ((flag & 2) == 0)
+ {
+ char *pa;
+
+ pa = locate_attr (&mft->attr, mft, AT_DATA);
+ if (pa == NULL)
+ return grub_error (GRUB_ERR_BAD_FS, "No $DATA in MFT 0x%X", mftno);
+
+ if (!pa[8])
+ mft->size = u32at (pa, 0x10);
+ else
+ mft->size = u32at (pa, 0x30);
+
+ if ((mft->attr.flags & AF_ALST) == 0)
+ mft->attr.attr_end = 0; /* Don't jump to attribute list */
+ }
+ else
+ init_attr (&mft->attr, mft);
+
+ return 0;
+}
+
+static void
+free_file (struct grub_ntfs_file *mft)
+{
+ free_attr (&mft->attr);
+ grub_free (mft->buf);
+}
+
+static int
+list_file (struct grub_ntfs_file *diro, char *pos,
+ int NESTED_FUNC_ATTR
+ (*hook) (const char *filename,
+ enum grub_fshelp_filetype filetype,
+ grub_fshelp_node_t node))
+{
+ char *np;
+ int ns;
+
+ while (1)
+ {
+ char *ustr;
+ if (pos[0xC] & 2) /* end signature */
+ break;
+
+ np = pos + 0x52;
+ ns = (unsigned char) *(np - 2);
+ if (ns)
+ {
+ enum grub_fshelp_filetype type;
+ struct grub_ntfs_file *fdiro;
+
+ if (u16at (pos, 4))
+ {
+ grub_error (GRUB_ERR_BAD_FS, "64-bit MFT number");
+ return 0;
+ }
+
+ type =
+ (u32at (pos, 0x48) & ATTR_DIRECTORY) ? GRUB_FSHELP_DIR :
+ GRUB_FSHELP_REG;
+
+ fdiro = grub_malloc (sizeof (struct grub_ntfs_file));
+ if (!fdiro)
+ return 0;
+
+ grub_memset (fdiro, 0, sizeof (*fdiro));
+ fdiro->data = diro->data;
+ fdiro->ino = u32at (pos, 0);
+
+ ustr = grub_malloc (ns * 4 + 1);
+ if (ustr == NULL)
+ return 0;
+ *grub_utf16_to_utf8 ((grub_uint8_t *) ustr, (grub_uint16_t *) np,
+ ns) = '\0';
+
+ if (hook (ustr, type, fdiro))
+ {
+ grub_free (ustr);
+ return 1;
+ }
+
+ grub_free (ustr);
+ }
+ pos += u16at (pos, 8);
+ }
+ return 0;
+}
+
+static int
+grub_ntfs_iterate_dir (grub_fshelp_node_t dir,
+ int NESTED_FUNC_ATTR
+ (*hook) (const char *filename,
+ enum grub_fshelp_filetype filetype,
+ grub_fshelp_node_t node))
+{
+ unsigned char *bitmap;
+ struct grub_ntfs_attr attr, *at;
+ char *cur_pos, *indx, *bmp;
+ int bitmap_len, ret = 0;
+ struct grub_ntfs_file *mft;
+
+ mft = (struct grub_ntfs_file *) dir;
+
+ if (!mft->inode_read)
+ {
+ if (init_file (mft, mft->ino))
+ return 0;
+ }
+
+ indx = NULL;
+ bmp = NULL;
+
+ at = &attr;
+ init_attr (at, mft);
+ while (1)
+ {
+ if ((cur_pos = find_attr (at, AT_INDEX_ROOT)) == NULL)
+ {
+ grub_error (GRUB_ERR_BAD_FS, "No $INDEX_ROOT");
+ goto done;
+ }
+
+ /* Resident, Namelen=4, Offset=0x18, Flags=0x00, Name="$I30" */
+ if ((u32at (cur_pos, 8) != 0x180400) ||
+ (u32at (cur_pos, 0x18) != 0x490024) ||
+ (u32at (cur_pos, 0x1C) != 0x300033))
+ continue;
+ cur_pos += u16at (cur_pos, 0x14);
+ if (*cur_pos != 0x30) /* Not filename index */
+ continue;
+ break;
+ }
+
+ cur_pos += 0x10; /* Skip index root */
+ ret = list_file (mft, cur_pos + u16at (cur_pos, 0), hook);
+ if (ret)
+ goto done;
+
+ bitmap = NULL;
+ bitmap_len = 0;
+ free_attr (at);
+ init_attr (at, mft);
+ while ((cur_pos = find_attr (at, AT_BITMAP)) != NULL)
+ {
+ int ofs;
+
+ ofs = (unsigned char) cur_pos[0xA];
+ /* Namelen=4, Name="$I30" */
+ if ((cur_pos[9] == 4) &&
+ (u32at (cur_pos, ofs) == 0x490024) &&
+ (u32at (cur_pos, ofs + 4) == 0x300033))
+ {
+ if ((at->flags & AF_ALST) && (cur_pos[8] == 0))
+ {
+ grub_error (GRUB_ERR_BAD_FS,
+ "$BITMAP should be non-resident when in attribute
list");
+ goto done;
+ }
+ if (cur_pos[8] == 0)
+ {
+ bitmap = (unsigned char *) (cur_pos + u16at (cur_pos, 0x14));
+ bitmap_len = u32at (cur_pos, 0x10);
+ break;
+ }
+ if (u32at (cur_pos, 0x28) > BMP_LEN)
+ {
+ grub_error (GRUB_ERR_BAD_FS, "Non-resident $BITMAP too large");
+ goto done;
+ }
+ bmp = grub_malloc (u32at (cur_pos, 0x28));
+ if (bmp == NULL)
+ goto done;
+
+ bitmap = (unsigned char *) bmp;
+ bitmap_len = u32at (cur_pos, 0x30);
+ if (read_data (at, cur_pos, bmp, 0, u32at (cur_pos, 0x28), 0, 0))
+ {
+ grub_error (GRUB_ERR_BAD_FS,
+ "Fails to read non-resident $BITMAP");
+ goto done;
+ }
+ break;
+ }
+ }
+
+ free_attr (at);
+ cur_pos = locate_attr (at, mft, AT_INDEX_ALLOCATION);
+ while (cur_pos != NULL)
+ {
+ /* Non-resident, Namelen=4, Offset=0x40, Flags=0, Name="$I30" */
+ if ((u32at (cur_pos, 8) == 0x400401) &&
+ (u32at (cur_pos, 0x40) == 0x490024) &&
+ (u32at (cur_pos, 0x44) == 0x300033))
+ break;
+ cur_pos = find_attr (at, AT_INDEX_ALLOCATION);
+ }
+
+ if ((!cur_pos) && (bitmap))
+ {
+ grub_error (GRUB_ERR_BAD_FS, "$BITMAP without $INDEX_ALLOCATION");
+ goto done;
+ }
+
+ if (bitmap)
+ {
+ unsigned long 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++)
+ {
+ if (*bitmap & v)
+ {
+ if ((read_attr
+ (at, indx, i * (mft->data->idx_size << BLK_SHR),
+ (mft->data->idx_size << BLK_SHR), 0, 0))
+ || (fixup (mft->data, indx, mft->data->idx_size, "INDX")))
+ goto done;
+ ret = list_file (mft, &indx[0x18 + u16at (indx, 0x18)], hook);
+ if (ret)
+ goto done;
+ }
+ v <<= 1;
+ if (v >= 0x100)
+ {
+ v = 1;
+ bitmap++;
+ }
+ }
+ }
+
+done:
+ free_attr (at);
+ grub_free (indx);
+ grub_free (bmp);
+
+ return ret;
+}
+
+static struct grub_ntfs_data *
+grub_ntfs_mount (grub_disk_t disk)
+{
+ struct grub_ntfs_bpb bpb;
+ struct grub_ntfs_data *data = 0;
+
+ if (!disk)
+ goto fail;
+
+ data = (struct grub_ntfs_data *) grub_malloc (sizeof (*data));
+ if (!data)
+ goto fail;
+
+ grub_memset (data, 0, sizeof (*data));
+
+ data->disk = disk;
+
+ /* Read the BPB. */
+ if (grub_disk_read (disk, 0, 0, sizeof (bpb), (char *) &bpb))
+ goto fail;
+
+ if (grub_memcmp ((char *) &bpb.oem_name, "NTFS", 4))
+ goto fail;
+
+ data->blocksize = grub_le_to_cpu16 (bpb.bytes_per_sector);
+ data->spc = bpb.sectors_per_cluster * (data->blocksize >> BLK_SHR);
+
+ if (bpb.clusters_per_mft > 0)
+ data->mft_size = data->spc * bpb.clusters_per_mft;
+ else
+ data->mft_size = 1 << (-bpb.clusters_per_mft - BLK_SHR);
+
+ if (bpb.clusters_per_index > 0)
+ data->idx_size = data->spc * bpb.clusters_per_index;
+ else
+ data->idx_size = 1 << (-bpb.clusters_per_index - BLK_SHR);
+
+ data->mft_start = grub_le_to_cpu64 (bpb.mft_lcn) * data->spc;
+
+ if ((data->mft_size > MAX_MFT) || (data->idx_size > MAX_IDX) ||
+ (data->spc > MAX_SPC) || (data->spc > data->idx_size))
+ goto fail;
+
+ data->mmft.data = data;
+ data->cmft.data = data;
+
+ data->mmft.buf = grub_malloc (data->mft_size << BLK_SHR);
+ if (!data->mmft.buf)
+ goto fail;
+
+ if (grub_disk_read
+ (disk, data->mft_start, 0, data->mft_size << BLK_SHR, data->mmft.buf))
+ goto fail;
+
+ if (fixup (data, data->mmft.buf, data->mft_size, "FILE"))
+ goto fail;
+
+ if (!locate_attr (&data->mmft.attr, &data->mmft, AT_DATA))
+ goto fail;
+
+ if (init_file (&data->cmft, FILE_ROOT))
+ goto fail;
+
+ return data;
+
+fail:
+ grub_error (GRUB_ERR_BAD_FS, "not an ntfs filesystem");
+
+ if (data)
+ {
+ free_file (&data->mmft);
+ free_file (&data->cmft);
+ }
+ return 0;
+}
+
+static grub_err_t
+grub_ntfs_dir (grub_device_t device, const char *path,
+ int (*hook) (const char *filename, int dir))
+{
+ struct grub_ntfs_data *data = 0;
+ struct grub_fshelp_node *fdiro = 0;
+
+ auto int NESTED_FUNC_ATTR iterate (const char *filename,
+ enum grub_fshelp_filetype filetype,
+ grub_fshelp_node_t node);
+
+ int NESTED_FUNC_ATTR iterate (const char *filename,
+ enum grub_fshelp_filetype filetype,
+ grub_fshelp_node_t node)
+ {
+ grub_free (node);
+
+ if (filetype == GRUB_FSHELP_DIR)
+ return hook (filename, 1);
+ else
+ return hook (filename, 0);
+
+ return 0;
+ }
+
+#ifndef GRUB_UTIL
+ grub_dl_ref (my_mod);
+#endif
+
+
+ data = grub_ntfs_mount (device->disk);
+ if (!data)
+ goto fail;
+
+ grub_fshelp_find_file (path, &data->cmft, &fdiro, grub_ntfs_iterate_dir,
+ 0, GRUB_FSHELP_DIR);
+
+ if (grub_errno)
+ goto fail;
+
+ grub_ntfs_iterate_dir (fdiro, iterate);
+
+fail:
+ if ((fdiro) && (fdiro != &data->cmft))
+ {
+ free_file (fdiro);
+ grub_free (fdiro);
+ }
+ if (data)
+ {
+ free_file (&data->mmft);
+ free_file (&data->cmft);
+ grub_free (data);
+ }
+
+#ifndef GRUB_UTIL
+ grub_dl_unref (my_mod);
+#endif
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_ntfs_open (grub_file_t file, const char *name)
+{
+ struct grub_ntfs_data *data = 0;
+ struct grub_fshelp_node *mft = 0;
+
+#ifndef GRUB_UTIL
+ grub_dl_ref (my_mod);
+#endif
+
+ data = grub_ntfs_mount (file->device->disk);
+ if (!data)
+ goto fail;
+
+ grub_fshelp_find_file (name, &data->cmft, &mft, grub_ntfs_iterate_dir,
+ 0, GRUB_FSHELP_REG);
+
+ if (grub_errno)
+ goto fail;
+
+ if (mft != &data->cmft)
+ {
+ free_file (&data->cmft);
+ grub_memcpy (&data->cmft, mft, sizeof (*mft));
+ grub_free (mft);
+ if (!data->cmft.inode_read)
+ {
+ if (init_file (&data->cmft, data->cmft.ino))
+ goto fail;
+ }
+ }
+
+ file->size = data->cmft.size;
+ file->data = data;
+ file->offset = 0;
+
+ return 0;
+
+fail:
+ if (data)
+ {
+ free_file (&data->mmft);
+ free_file (&data->cmft);
+ grub_free (data);
+ }
+
+#ifndef GRUB_UTIL
+ grub_dl_unref (my_mod);
+#endif
+
+ return grub_errno;
+}
+
+static grub_ssize_t
+grub_ntfs_read (grub_file_t file, char *buf, grub_size_t len)
+{
+ struct grub_ntfs_file *mft;
+
+ mft = &((struct grub_ntfs_data *) file->data)->cmft;
+ if (file->read_hook)
+ mft->attr.save_pos = 1;
+
+ if (file->offset > file->size)
+ {
+ grub_error (GRUB_ERR_BAD_FS, "Bad offset");
+ return -1;
+ }
+
+ if (file->offset + len > file->size)
+ len = file->size - file->offset;
+
+ read_attr (&mft->attr, buf, file->offset, len, 1, file->read_hook);
+ return (grub_errno) ? 0 : len;
+}
+
+static grub_err_t
+grub_ntfs_close (grub_file_t file)
+{
+ struct grub_ntfs_data *data;
+
+ data = file->data;
+
+ if (data)
+ {
+ free_file (&data->mmft);
+ free_file (&data->cmft);
+ grub_free (data);
+ }
+
+#ifndef GRUB_UTIL
+ grub_dl_unref (my_mod);
+#endif
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_ntfs_label (grub_device_t device, char **label)
+{
+ struct grub_ntfs_data *data = 0;
+ struct grub_fshelp_node *mft = 0;
+ char *pa;
+
+#ifndef GRUB_UTIL
+ grub_dl_ref (my_mod);
+#endif
+
+ *label = 0;
+
+ data = grub_ntfs_mount (device->disk);
+ if (!data)
+ goto fail;
+
+ grub_fshelp_find_file ("/$Volume", &data->cmft, &mft, grub_ntfs_iterate_dir,
+ 0, GRUB_FSHELP_REG);
+
+ if (grub_errno)
+ goto fail;
+
+ if (!mft->inode_read)
+ {
+ mft->buf = grub_malloc (mft->data->mft_size << BLK_SHR);
+ if (mft->buf == NULL)
+ goto fail;
+
+ if (read_mft (mft->data, mft->buf, mft->ino))
+ goto fail;
+ }
+
+ init_attr (&mft->attr, mft);
+ pa = find_attr (&mft->attr, AT_VOLUME_NAME);
+ if ((pa) && (pa[8] == 0) && (u32at (pa, 0x10)))
+ {
+ char *buf;
+ int len;
+
+ len = u32at (pa, 0x10) / 2;
+ buf = grub_malloc (len * 4 + 1);
+ pa += u16at (pa, 0x14);
+ *grub_utf16_to_utf8 ((grub_uint8_t *) buf, (grub_uint16_t *) pa, len) =
+ '\0';
+ *label = buf;
+ }
+
+fail:
+ if ((mft) && (mft != &data->cmft))
+ {
+ free_file (mft);
+ grub_free (mft);
+ }
+ if (data)
+ {
+ free_file (&data->mmft);
+ free_file (&data->cmft);
+ grub_free (data);
+ }
+
+#ifndef GRUB_UTIL
+ grub_dl_unref (my_mod);
+#endif
+
+ return grub_errno;
+}
+
+static struct grub_fs grub_ntfs_fs = {
+ .name = "ntfs",
+ .dir = grub_ntfs_dir,
+ .open = grub_ntfs_open,
+ .read = grub_ntfs_read,
+ .close = grub_ntfs_close,
+ .label = grub_ntfs_label,
+ .next = 0
+};
+
+GRUB_MOD_INIT (ntfs)
+{
+ grub_fs_register (&grub_ntfs_fs);
+#ifndef GRUB_UTIL
+ my_mod = mod;
+#endif
+}
+
+GRUB_MOD_FINI (ntfs)
+{
+ grub_fs_unregister (&grub_ntfs_fs);
+}