tablet/grub
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
grub/grub-core/fs/ntfs.c
Andrew Hamilton 06914b6141 fs/ntfs: Correct attribute vs attribute list validation 
Correct ntfs_test test failures around attempting to validate attribute
list entries as attributes. The NTFS code uses common logic in some
places to parse both attributes and attribute_lists which complicates
validation. Attribute lists contain different headers including a
different size of the length field (2 bytes) at offset 4 instead of the
4 byte length field used in attributes at offset 4. There are other
differences as well, but attempting to validate attribute list types
using attribute header validation was causing failure of the NTFS test
suite. This change restores some of the validation logic which may be
shared between attributes and attribute lists to be closer to the
original logic prior to fixes for previous CVEs. A following commit will
address some of the implications of removing this validation logic by
correcting some fuzzer failures (some which are exposed by removing the
validation in some of the cases).

Fixes: 067b6d225 (fs/ntfs: Implement attribute verification)

Signed-off-by: Andrew Hamilton <adhamilt@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2025-05-29 15:45:24 +02:00

1600 lines
40 KiB
C
Raw Blame History

/* ntfs.c - NTFS filesystem */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2008,2009 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/>.
*/
#define grub_fshelp_node grub_ntfs_file
#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>
#include <grub/charset.h>
#include <grub/lockdown.h>
GRUB_MOD_LICENSE ("GPLv3+");
static grub_dl_t my_mod;
#define grub_fshelp_node grub_ntfs_file
static inline grub_uint16_t
u16at (void *ptr, grub_size_t ofs)
{
return grub_le_to_cpu16 (grub_get_unaligned16 ((char *) ptr + ofs));
}
static inline grub_uint32_t
u32at (void *ptr, grub_size_t ofs)
{
return grub_le_to_cpu32 (grub_get_unaligned32 ((char *) ptr + ofs));
}
static inline grub_uint64_t
u64at (void *ptr, grub_size_t ofs)
{
return grub_le_to_cpu64 (grub_get_unaligned64 ((char *) ptr + ofs));
}
static grub_uint16_t
first_attr_off (void *mft_buf_ptr)
{
return u16at (mft_buf_ptr, 0x14);
}
static grub_uint16_t
res_attr_data_off (void *res_attr_ptr)
{
return u16at (res_attr_ptr, 0x14);
}
static grub_uint32_t
res_attr_data_len (void *res_attr_ptr)
{
return u32at (res_attr_ptr, 0x10);
}
/*
* Check if the attribute is valid and doesn't exceed the allocated region.
* This accounts for resident and non-resident data.
*
* This is based off the documentation from the linux-ntfs project:
* https://flatcap.github.io/linux-ntfs/ntfs/concepts/attribute_header.html
*/
static bool
validate_attribute (grub_uint8_t *attr, void *end)
{
grub_size_t attr_size = 0;
grub_size_t min_size = 0;
grub_size_t run_size = 0;
grub_size_t spare = (grub_uint8_t *) end - attr;
/*
* Just used as a temporary variable to try and deal with cases where someone
* tries to overlap fields.
*/
grub_size_t curr = 0;
/* Need verify we can entirely read the attributes header. */
if (attr + GRUB_NTFS_ATTRIBUTE_HEADER_SIZE >= (grub_uint8_t *) end)
goto fail;
/*
* So, the rest of this code uses a 16bit int for the attribute length but
* from reading the all the documentation I could find it says this field is
* actually 32bit. But let's be consistent with the rest of the code.
*
* https://elixir.bootlin.com/linux/v6.10.7/source/fs/ntfs3/ntfs.h#L370
*/
attr_size = u16at (attr, GRUB_NTFS_ATTRIBUTE_LENGTH);
if (attr_size > spare)
goto fail;
/* Not an error case, just reached the end of the attributes. */
if (attr_size == 0)
return false;
/*
* Extra validation by trying to calculate a minimum possible size for this
* attribute. +8 from the size of the resident data struct which is the
* minimum that can be added.
*/
min_size = GRUB_NTFS_ATTRIBUTE_HEADER_SIZE + 8;
if (min_size > attr_size)
goto fail;
/* Is the data is resident (0) or not (1). */
if (attr[GRUB_NTFS_ATTRIBUTE_RESIDENT] == 0)
{
/* Read the offset and size of the attribute. */
curr = u16at (attr, GRUB_NTFS_ATTRIBUTE_RES_OFFSET);
curr += u32at (attr, GRUB_NTFS_ATTRIBUTE_RES_LENGTH);
if (curr > min_size)
min_size = curr;
}
else
{
/*
* If the data is non-resident, the minimum size is 64 which is where
* the data runs start. We already have a minimum size of 24. So, just
* adding 40 to get to the real value.
*/
min_size += 40;
if (min_size > attr_size)
goto fail;
/* If the compression unit size is > 0, +8 bytes*/
if (u16at (attr, GRUB_NTFS_ATTRIBUTE_COMPRESSION_UNIT_SIZE) > 0)
min_size += 8;
/*
* Need to consider the data runs now. Each member of the run has byte
* that describes the size of the data length and offset. Each being
* 4 bits in the byte.
*/
curr = u16at (attr, GRUB_NTFS_ATTRIBUTE_DATA_RUNS);
if (curr + 1 > min_size)
min_size = curr + 1;
if (min_size > attr_size)
goto fail;
/*
* Each attribute can store multiple data runs which are stored
* continuously in the attribute. They exist as one header byte
* with up to 14 bytes following it depending on the lengths.
* We stop when we hit a header that is just a NUL byte.
*
* https://flatcap.github.io/linux-ntfs/ntfs/concepts/data_runs.html
*/
while (attr[curr] != 0)
{
/*
* We stop when we hit a header that is just a NUL byte. The data
* run header is stored as a single byte where the top 4 bits refer
* to the number of bytes used to store the total length of the
* data run, and the number of bytes used to store the offset.
* These directly follow the header byte, so we use them to update
* the minimum size. Increment by one more than run size to move on
* to the next run size header byte. An example is a run size field
* value of 0x32, 3 + 2 = 5 bytes follow the run size. Increment
* by 5 to get to the end of this data run then one more to get to
* the start of the next run size byte.
*/
run_size = (attr[curr] & 0x7) + ((attr[curr] >> 4) & 0x7);
curr += (run_size + 1);
min_size += (run_size + 1);
if (min_size > attr_size)
goto fail;
}
}
/* Name offset, doing this after data residence checks. */
if (u16at (attr, GRUB_NTFS_ATTRIBUTE_NAME_OFFSET) != 0)
{
curr = u16at (attr, GRUB_NTFS_ATTRIBUTE_NAME_OFFSET);
/*
* Multiple the name length by 2 as its UTF-16. Can be zero if this in an
* unamed attribute.
*/
curr += attr[GRUB_NTFS_ATTRIBUTE_NAME_LENGTH] * 2;
if (curr > min_size)
min_size = curr;
}
/* Padded to 8 bytes. */
if (min_size % 8 != 0)
min_size += 8 - (min_size % 8);
/*
* At this point min_size should be exactly attr_size but being flexible
* here to avoid any issues.
*/
if (min_size > attr_size)
goto fail;
return true;
fail:
grub_dprintf ("ntfs", "spare=%" PRIuGRUB_SIZE " min_size=%" PRIuGRUB_SIZE " attr_size=%" PRIuGRUB_SIZE "\n",
spare, min_size, attr_size);
return false;
}
/* Return the next attribute if it exists, otherwise return NULL. */
static grub_uint8_t *
next_attribute (grub_uint8_t *curr_attribute, void *end, bool validate)
{
grub_uint8_t *next = curr_attribute;
/*
* Need to verify we aren't exceeding the end of the buffer by reading the
* header for the current attribute
*/
if (curr_attribute + GRUB_NTFS_ATTRIBUTE_HEADER_SIZE >= (grub_uint8_t *) end)
return NULL;
next += u16at (curr_attribute, 4);
if (validate && validate_attribute (next, end) == false)
return NULL;
return next;
}
grub_ntfscomp_func_t grub_ntfscomp_func;
static grub_err_t
fixup (grub_uint8_t *buf, grub_size_t len, const grub_uint8_t *magic)
{
grub_uint16_t ss;
grub_uint8_t *pu;
grub_uint16_t us;
COMPILE_TIME_ASSERT ((1 << GRUB_NTFS_BLK_SHR) == GRUB_DISK_SECTOR_SIZE);
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 != len)
return grub_error (GRUB_ERR_BAD_FS, "size not match");
pu = buf + u16at (buf, 4);
us = u16at (pu, 0);
buf -= 2;
while (ss > 0)
{
buf += GRUB_DISK_SECTOR_SIZE;
pu += 2;
if (u16at (buf, 0) != us)
return grub_error (GRUB_ERR_BAD_FS, "fixup signature not match");
buf[0] = pu[0];
buf[1] = pu[1];
ss--;
}
return 0;
}
static grub_err_t read_mft (struct grub_ntfs_data *data, grub_uint8_t *buf,
grub_uint64_t mftno);
static grub_err_t read_attr (struct grub_ntfs_attr *at, grub_uint8_t *dest,
grub_disk_addr_t ofs, grub_size_t len,
int cached,
grub_disk_read_hook_t read_hook,
void *read_hook_data);
static grub_err_t read_data (struct grub_ntfs_attr *at, grub_uint8_t *pa,
grub_uint8_t *dest,
grub_disk_addr_t ofs, grub_size_t len,
int cached,
grub_disk_read_hook_t read_hook,
void *read_hook_data);
static grub_err_t
init_attr (struct grub_ntfs_attr *at, struct grub_ntfs_file *mft)
{
at->mft = mft;
at->flags = (mft == &mft->data->mmft) ? GRUB_NTFS_AF_MMFT : 0;
at->attr_nxt = mft->buf + first_attr_off (mft->buf);
at->end = mft->buf + (mft->data->mft_size << GRUB_NTFS_BLK_SHR);
if (at->attr_nxt > at->end)
return grub_error (GRUB_ERR_BAD_FS, "attributes start outside the MFT");
at->attr_end = at->emft_buf = at->edat_buf = at->sbuf = NULL;
return GRUB_ERR_NONE;
}
static void
free_attr (struct grub_ntfs_attr *at)
{
grub_free (at->emft_buf);
grub_free (at->edat_buf);
grub_free (at->sbuf);
}
static grub_uint8_t *
find_attr (struct grub_ntfs_attr *at, grub_uint8_t attr)
{
grub_uint8_t *mft_end;
grub_uint16_t nsize;
grub_uint16_t nxt_offset;
/* GRUB_NTFS_AF_ALST indicates the attribute list type */
if (at->flags & GRUB_NTFS_AF_ALST)
{
retry:
while (at->attr_nxt)
{
at->attr_cur = at->attr_nxt;
/*
* Go to the next attribute in the list but do not validate
* because this is the attribute list type.
*/
at->attr_nxt = next_attribute (at->attr_cur, at->attr_end, false);
if ((*at->attr_cur == attr) || (attr == 0))
{
grub_uint8_t *new_pos, *end;
if (at->flags & GRUB_NTFS_AF_MMFT)
{
if ((grub_disk_read
(at->mft->data->disk, u32at (at->attr_cur, 0x10), 0,
512, at->emft_buf))
||
(grub_disk_read
(at->mft->data->disk, u32at (at->attr_cur, 0x14), 0,
512, at->emft_buf + 512)))
return NULL;
if (fixup (at->emft_buf, at->mft->data->mft_size,
(const grub_uint8_t *) "FILE"))
return NULL;
}
else
{
if (read_mft (at->mft->data, at->emft_buf,
u32at (at->attr_cur, 0x10)))
return NULL;
}
/*
* Only time emft_bufs is defined is in this function, with this
* size.
*/
grub_size_t emft_buf_size =
at->mft->data->mft_size << GRUB_NTFS_BLK_SHR;
/*
* Needs to be enough space for the successful case to even
* bother.
*/
if (first_attr_off (at->emft_buf) >= (emft_buf_size - 0x18 - 2))
{
grub_error (GRUB_ERR_BAD_FS,
"can\'t find 0x%X in attribute list",
(unsigned char) *at->attr_cur);
return NULL;
}
new_pos = &at->emft_buf[first_attr_off (at->emft_buf)];
end = &at->emft_buf[emft_buf_size];
while (new_pos && *new_pos != 0xFF)
{
if ((*new_pos == *at->attr_cur)
&& (u16at (new_pos, 0xE) == u16at (at->attr_cur, 0x18)))
{
return new_pos;
}
/*
* Go to the next attribute in the list but do not validate
* because this is the attribute list type.
*/
new_pos = next_attribute (new_pos, end, false);
}
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;
mft_end = at->mft->buf + (at->mft->data->mft_size << GRUB_NTFS_BLK_SHR);
while (at->attr_cur >= at->mft->buf && at->attr_cur < mft_end && *at->attr_cur != 0xFF)
{
/*
* We can't use validate_attribute here because this logic
* seems to be used for both parsing through attributes
* and attribute lists.
*/
nsize = u16at (at->attr_cur, 4);
if (at->attr_cur + grub_max (GRUB_NTFS_ATTRIBUTE_HEADER_SIZE, nsize) >= at->end)
{
at->attr_nxt = at->attr_cur;
break;
}
else
at->attr_nxt = at->attr_cur + nsize;
if (*at->attr_cur == GRUB_NTFS_AT_ATTRIBUTE_LIST)
at->attr_end = at->attr_cur;
if ((*at->attr_cur == attr) || (attr == 0))
return at->attr_cur;
at->attr_cur = at->attr_nxt;
}
if (at->attr_end)
{
grub_uint8_t *pa, *pa_end;
at->emft_buf = grub_malloc (at->mft->data->mft_size << GRUB_NTFS_BLK_SHR);
if (at->emft_buf == NULL)
return NULL;
pa = at->attr_end;
if (pa[8])
{
grub_uint32_t n;
n = ((u32at (pa, 0x30) + GRUB_DISK_SECTOR_SIZE - 1)
& (~(GRUB_DISK_SECTOR_SIZE - 1)));
at->attr_cur = at->attr_end;
at->edat_buf = grub_malloc (n);
if (!at->edat_buf)
return NULL;
if (read_data (at, pa, at->edat_buf, 0, n, 0, 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);
pa_end = at->edat_buf + n;
}
else
{
at->attr_nxt = at->attr_end + res_attr_data_off (pa);
at->attr_end = at->attr_end + u32at (pa, 4);
pa_end = at->mft->buf + (at->mft->data->mft_size << GRUB_NTFS_BLK_SHR);
}
at->flags |= GRUB_NTFS_AF_ALST;
/* From this point on pa_end is the end of the buffer */
at->end = pa_end;
if (at->attr_end >= pa_end || at->attr_nxt >= pa_end)
return NULL;
while (at->attr_nxt)
{
if ((*at->attr_nxt == attr) || (attr == 0))
break;
nxt_offset = u16at (at->attr_nxt, 4);
at->attr_nxt += nxt_offset;
/*
* Stop and set attr_nxt to NULL when either the next offset is zero,
* or when the pointer is within four bytes of the end of the buffer
* since we could attempt to access attr_nxt + 4 bytes offset above to
* get the next 16-bit 'nxt_offset' value.
*/
if (nxt_offset == 0 || at->attr_nxt >= (pa_end - 4))
at->attr_nxt = NULL;
}
if (at->attr_nxt >= at->attr_end || at->attr_nxt == NULL)
return NULL;
if ((at->flags & GRUB_NTFS_AF_MMFT) && (attr == GRUB_NTFS_AT_DATA))
{
at->flags |= GRUB_NTFS_AF_GPOS;
at->attr_cur = at->attr_nxt;
pa = at->attr_cur;
if ((pa >= pa_end) || (pa_end - pa < 0x18))
{
grub_error (GRUB_ERR_BAD_FS, "can\'t parse attribute list");
return NULL;
}
grub_set_unaligned32 ((char *) pa + 0x10,
grub_cpu_to_le32 (at->mft->data->mft_start));
grub_set_unaligned32 ((char *) pa + 0x14,
grub_cpu_to_le32 (at->mft->data->mft_start
+ 1));
pa = at->attr_nxt + u16at (pa, 4);
if (pa >= pa_end)
pa = NULL;
while (pa)
{
if (*pa != attr)
break;
if ((pa >= pa_end) || (pa_end - pa < 0x18))
{
grub_error (GRUB_ERR_BAD_FS, "can\'t parse attribute list");
return NULL;
}
if (read_attr
(at, pa + 0x10,
u32at (pa, 0x10) * (at->mft->data->mft_size << GRUB_NTFS_BLK_SHR),
at->mft->data->mft_size << GRUB_NTFS_BLK_SHR, 0, 0, 0))
return NULL;
pa += u16at (pa, 4);
if (pa >= pa_end)
pa = NULL;
}
at->attr_nxt = at->attr_cur;
at->flags &= ~GRUB_NTFS_AF_GPOS;
}
goto retry;
}
return NULL;
}
static grub_uint8_t *
locate_attr (struct grub_ntfs_attr *at, struct grub_ntfs_file *mft,
grub_uint8_t attr)
{
grub_uint8_t *pa;
if (init_attr (at, mft) != GRUB_ERR_NONE)
return NULL;
pa = find_attr (at, attr);
if (pa == NULL)
return NULL;
if ((at->flags & GRUB_NTFS_AF_ALST) == 0)
{
while (1)
{
pa = find_attr (at, attr);
if (pa == NULL)
break;
if (at->flags & GRUB_NTFS_AF_ALST)
return pa;
}
grub_errno = GRUB_ERR_NONE;
free_attr (at);
if (init_attr (at, mft) != GRUB_ERR_NONE)
return NULL;
pa = find_attr (at, attr);
}
return pa;
}
static grub_disk_addr_t
read_run_data (const grub_uint8_t *run, int nn, int sig)
{
grub_uint64_t r = 0;
if (sig && nn && (run[nn - 1] & 0x80))
r = -1;
grub_memcpy (&r, run, nn);
return grub_le_to_cpu64 (r);
}
grub_err_t
grub_ntfs_read_run_list (struct grub_ntfs_rlst * ctx)
{
grub_uint8_t c1, c2;
grub_disk_addr_t val;
grub_uint8_t *run;
run = ctx->cur_run;
retry:
c1 = ((*run) & 0x7);
c2 = ((*run) >> 4) & 0x7;
run++;
if (!c1)
{
if ((ctx->attr) && (ctx->attr->flags & GRUB_NTFS_AF_ALST))
{
grub_disk_read_hook_t save_hook;
save_hook = ctx->comp.disk->read_hook;
ctx->comp.disk->read_hook = 0;
run = find_attr (ctx->attr, *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 overflow");
}
ctx->curr_vcn = ctx->next_vcn;
ctx->next_vcn += read_run_data (run, c1, 0); /* length of current VCN */
run += c1;
val = read_run_data (run, c2, 1); /* offset to previous LCN */
run += c2;
ctx->curr_lcn += val;
if (val == 0)
ctx->flags |= GRUB_NTFS_RF_BLNK;
else
ctx->flags &= ~GRUB_NTFS_RF_BLNK;
ctx->cur_run = run;
return 0;
}
static grub_disk_addr_t
grub_ntfs_read_block (grub_fshelp_node_t node, grub_disk_addr_t block)
{
struct grub_ntfs_rlst *ctx;
ctx = (struct grub_ntfs_rlst *) node;
if (block >= ctx->next_vcn)
{
if (grub_ntfs_read_run_list (ctx))
return -1;
return ctx->curr_lcn;
}
else
return (ctx->flags & GRUB_NTFS_RF_BLNK) ? 0 : (block -
ctx->curr_vcn + ctx->curr_lcn);
}
static grub_err_t
read_data (struct grub_ntfs_attr *at, grub_uint8_t *pa, grub_uint8_t *dest,
grub_disk_addr_t ofs, grub_size_t len, int cached,
grub_disk_read_hook_t read_hook, void *read_hook_data)
{
struct grub_ntfs_rlst cc, *ctx;
if (len == 0)
return 0;
grub_memset (&cc, 0, sizeof (cc));
ctx = &cc;
ctx->attr = at;
ctx->comp.log_spc = at->mft->data->log_spc;
ctx->comp.disk = at->mft->data->disk;
if (read_hook == grub_file_progress_hook)
ctx->file = read_hook_data;
if (pa[8] == 0)
{
if (ofs + len > res_attr_data_len (pa))
return grub_error (GRUB_ERR_BAD_FS, "read out of range");
if (res_attr_data_len (pa) > (at->mft->data->mft_size << GRUB_NTFS_BLK_SHR))
return grub_error (GRUB_ERR_BAD_FS, "resident attribute too large");
if (pa >= at->mft->buf + (at->mft->data->mft_size << GRUB_NTFS_BLK_SHR))
return grub_error (GRUB_ERR_BAD_FS, "resident attribute out of range");
if (res_attr_data_off (pa) + res_attr_data_len (pa) >
(grub_addr_t) at->mft->buf + (at->mft->data->mft_size << GRUB_NTFS_BLK_SHR) - (grub_addr_t) pa)
return grub_error (GRUB_ERR_BAD_FS, "resident attribute out of range");
grub_memcpy (dest, pa + res_attr_data_off (pa) + ofs, len);
return 0;
}
ctx->cur_run = pa + u16at (pa, 0x20);
ctx->next_vcn = u32at (pa, 0x10);
ctx->curr_lcn = 0;
if ((pa[0xC] & GRUB_NTFS_FLAG_COMPRESSED)
&& !(at->flags & GRUB_NTFS_AF_GPOS))
{
if (!cached)
return grub_error (GRUB_ERR_BAD_FS, "attribute can\'t be compressed");
return (grub_ntfscomp_func) ? grub_ntfscomp_func (dest, ofs, len, ctx)
: grub_error (GRUB_ERR_BAD_FS, N_("module `%s' isn't loaded"),
"ntfscomp");
}
ctx->target_vcn = ofs >> (GRUB_NTFS_BLK_SHR + ctx->comp.log_spc);
while (ctx->next_vcn <= ctx->target_vcn)
{
if (grub_ntfs_read_run_list (ctx))
return grub_errno;
}
if (at->flags & GRUB_NTFS_AF_GPOS)
{
grub_disk_addr_t st0, st1;
grub_uint64_t m;
m = (ofs >> GRUB_NTFS_BLK_SHR) & ((1 << ctx->comp.log_spc) - 1);
st0 =
((ctx->target_vcn - ctx->curr_vcn + ctx->curr_lcn) << ctx->comp.log_spc) + m;
st1 = st0 + 1;
if (st1 ==
(ctx->next_vcn - ctx->curr_vcn + ctx->curr_lcn) << ctx->comp.log_spc)
{
if (grub_ntfs_read_run_list (ctx))
return grub_errno;
st1 = ctx->curr_lcn << ctx->comp.log_spc;
}
grub_set_unaligned32 (dest, grub_cpu_to_le32 (st0));
grub_set_unaligned32 (dest + 4, grub_cpu_to_le32 (st1));
return 0;
}
grub_fshelp_read_file (ctx->comp.disk, (grub_fshelp_node_t) ctx,
read_hook, read_hook_data, ofs, len,
(char *) dest,
grub_ntfs_read_block, ofs + len,
ctx->comp.log_spc, 0);
return grub_errno;
}
static grub_err_t
read_attr (struct grub_ntfs_attr *at, grub_uint8_t *dest, grub_disk_addr_t ofs,
grub_size_t len, int cached,
grub_disk_read_hook_t read_hook, void *read_hook_data)
{
grub_uint8_t *save_cur;
grub_uint8_t attr;
grub_uint8_t *pp;
grub_err_t ret;
save_cur = at->attr_cur;
at->attr_nxt = at->attr_cur;
attr = *at->attr_nxt;
if (at->flags & GRUB_NTFS_AF_ALST)
{
grub_uint8_t *pa;
grub_disk_addr_t vcn;
/* If compression is possible make sure that we include possible
compressed block size. */
if (GRUB_NTFS_LOG_COM_SEC >= at->mft->data->log_spc)
vcn = ((ofs >> GRUB_NTFS_COM_LOG_LEN)
<< (GRUB_NTFS_LOG_COM_SEC - at->mft->data->log_spc)) & ~0xFULL;
else
vcn = ofs >> (at->mft->data->log_spc + GRUB_NTFS_BLK_SHR);
pa = at->attr_nxt + u16at (at->attr_nxt, 4);
if (validate_attribute (pa, at->attr_end) == false)
pa = NULL;
while (pa)
{
if (*pa != attr)
break;
if (u32at (pa, 8) > vcn)
break;
at->attr_nxt = pa;
pa = next_attribute (pa, at->attr_end, true);
}
}
pp = find_attr (at, attr);
if (pp)
ret = read_data (at, pp, dest, ofs, len, cached,
read_hook, read_hook_data);
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, grub_uint8_t *buf, grub_uint64_t mftno)
{
if (read_attr
(&data->mmft.attr, buf, mftno * ((grub_disk_addr_t) data->mft_size << GRUB_NTFS_BLK_SHR),
data->mft_size << GRUB_NTFS_BLK_SHR, 0, 0, 0))
return grub_error (GRUB_ERR_BAD_FS, "read MFT 0x%llx fails", (unsigned long long) mftno);
return fixup (buf, data->mft_size, (const grub_uint8_t *) "FILE");
}
static grub_err_t
init_file (struct grub_ntfs_file *mft, grub_uint64_t mftno)
{
unsigned short flag;
mft->inode_read = 1;
mft->buf = grub_malloc (mft->data->mft_size << GRUB_NTFS_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%llx is not in use",
(unsigned long long) mftno);
if ((flag & 2) == 0)
{
grub_uint8_t *pa;
pa = locate_attr (&mft->attr, mft, GRUB_NTFS_AT_DATA);
if (pa == NULL)
return grub_error (GRUB_ERR_BAD_FS, "no $DATA in MFT 0x%llx",
(unsigned long long) mftno);
if (!pa[8])
mft->size = res_attr_data_len (pa);
else
mft->size = u64at (pa, 0x30);
if ((mft->attr.flags & GRUB_NTFS_AF_ALST) == 0)
mft->attr.attr_end = 0; /* Don't jump to attribute list */
}
else
return 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 char *
get_utf8 (grub_uint8_t *in, grub_size_t len)
{
grub_uint8_t *buf;
grub_uint16_t *tmp;
grub_size_t i;
buf = grub_calloc (len, GRUB_MAX_UTF8_PER_UTF16 + 1);
tmp = grub_calloc (len, sizeof (tmp[0]));
if (!buf || !tmp)
{
grub_free (buf);
grub_free (tmp);
return NULL;
}
for (i = 0; i < len; i++)
tmp[i] = grub_le_to_cpu16 (grub_get_unaligned16 (in + 2 * i));
*grub_utf16_to_utf8 (buf, tmp, len) = '\0';
grub_free (tmp);
return (char *) buf;
}
static int
list_file (struct grub_ntfs_file *diro, grub_uint8_t *pos, grub_uint8_t *end_pos,
grub_fshelp_iterate_dir_hook_t hook, void *hook_data)
{
grub_uint8_t *np;
int ns;
while (1)
{
grub_uint8_t namespace;
char *ustr;
if ((pos >= end_pos) || (end_pos - pos < 0x52))
break;
if (pos[0xC] & 2) /* end signature */
break;
np = pos + 0x50;
ns = *(np++);
namespace = *(np++);
if (2 * ns > end_pos - pos - 0x52)
break;
/*
* Ignore files in DOS namespace, as they will reappear as Win32
* names.
*/
if ((ns) && (namespace != 2))
{
enum grub_fshelp_filetype type;
struct grub_ntfs_file *fdiro;
grub_uint32_t attr;
attr = u32at (pos, 0x48);
if (attr & GRUB_NTFS_ATTR_REPARSE)
type = GRUB_FSHELP_SYMLINK;
else if (attr & GRUB_NTFS_ATTR_DIRECTORY)
type = GRUB_FSHELP_DIR;
else
type = GRUB_FSHELP_REG;
fdiro = grub_zalloc (sizeof (struct grub_ntfs_file));
if (!fdiro)
return 0;
fdiro->data = diro->data;
fdiro->ino = u64at (pos, 0) & 0xffffffffffffULL;
fdiro->mtime = u64at (pos, 0x20);
ustr = get_utf8 (np, ns);
if (ustr == NULL)
{
grub_free (fdiro);
return 0;
}
if (namespace)
type |= GRUB_FSHELP_CASE_INSENSITIVE;
if (hook (ustr, type, fdiro, hook_data))
{
grub_free (ustr);
return 1;
}
grub_free (ustr);
}
pos += u16at (pos, 8);
}
return 0;
}
struct symlink_descriptor
{
grub_uint32_t type;
grub_uint32_t total_len;
grub_uint16_t off1;
grub_uint16_t len1;
grub_uint16_t off2;
grub_uint16_t len2;
} GRUB_PACKED;
static char *
grub_ntfs_read_symlink (grub_fshelp_node_t node)
{
struct grub_ntfs_file *mft;
struct symlink_descriptor symdesc;
grub_err_t err;
grub_uint8_t *buf16 = NULL;
char *buf, *end;
grub_size_t len;
grub_uint8_t *pa;
grub_size_t off;
mft = (struct grub_ntfs_file *) node;
mft->buf = grub_malloc (mft->data->mft_size << GRUB_NTFS_BLK_SHR);
if (mft->buf == NULL)
return NULL;
if (read_mft (mft->data, mft->buf, mft->ino))
goto fail;
pa = locate_attr (&mft->attr, mft, GRUB_NTFS_AT_SYMLINK);
if (pa == NULL)
{
grub_error (GRUB_ERR_BAD_FS, "no $SYMLINK in MFT 0x%llx",
(unsigned long long) mft->ino);
goto fail;
}
err = read_attr (&mft->attr, (grub_uint8_t *) &symdesc, 0,
sizeof (struct symlink_descriptor), 1, 0, 0);
if (err)
goto fail;
switch (grub_cpu_to_le32 (symdesc.type))
{
case 0xa000000c:
off = (sizeof (struct symlink_descriptor) + 4
+ grub_cpu_to_le32 (symdesc.off1));
len = grub_cpu_to_le32 (symdesc.len1);
break;
case 0xa0000003:
off = (sizeof (struct symlink_descriptor)
+ grub_cpu_to_le32 (symdesc.off1));
len = grub_cpu_to_le32 (symdesc.len1);
break;
default:
grub_error (GRUB_ERR_BAD_FS, "symlink type invalid (%x)",
grub_cpu_to_le32 (symdesc.type));
goto fail;
}
buf16 = grub_malloc (len);
if (!buf16)
goto fail;
err = read_attr (&mft->attr, buf16, off, len, 1, 0, 0);
if (err)
goto fail;
buf = get_utf8 (buf16, len / 2);
if (!buf)
goto fail;
grub_free (mft->buf);
grub_free (buf16);
for (end = buf; *end; end++)
if (*end == '\\')
*end = '/';
/* Split the sequence to avoid GCC thinking that this is a trigraph. */
if (grub_memcmp (buf, "/?" "?/", 4) == 0 && buf[5] == ':' && buf[6] == '/'
&& grub_isalpha (buf[4]))
{
grub_memmove (buf, buf + 6, end - buf + 1 - 6);
end -= 6;
}
return buf;
fail:
grub_free (mft->buf);
grub_free (buf16);
return NULL;
}
static int
grub_ntfs_iterate_dir (grub_fshelp_node_t dir,
grub_fshelp_iterate_dir_hook_t hook, void *hook_data)
{
grub_uint8_t *bitmap;
struct grub_ntfs_attr attr, *at;
grub_uint8_t *cur_pos, *indx, *bmp;
int ret = 0;
grub_size_t bitmap_len;
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;
if (init_attr (at, mft) != GRUB_ERR_NONE)
return 0;
while (1)
{
cur_pos = find_attr (at, GRUB_NTFS_AT_INDEX_ROOT);
if (cur_pos == 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 += res_attr_data_off (cur_pos);
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),
at->mft->buf + (at->mft->data->mft_size << GRUB_NTFS_BLK_SHR),
hook, hook_data);
if (ret)
goto done;
bitmap = NULL;
bitmap_len = 0;
free_attr (at);
/* No need to check errors here, as it will already be fine */
init_attr (at, mft);
while ((cur_pos = find_attr (at, GRUB_NTFS_AT_BITMAP)) != NULL)
{
int ofs;
ofs = cur_pos[0xA];
/* Namelen=4, Name="$I30" */
if ((cur_pos[9] == 4) &&
(u32at (cur_pos, ofs) == 0x490024) &&
(u32at (cur_pos, ofs + 4) == 0x300033))
{
int is_resident = (cur_pos[8] == 0);
bitmap_len = ((is_resident) ? res_attr_data_len (cur_pos) :
u32at (cur_pos, 0x28));
bmp = grub_malloc (bitmap_len);
if (bmp == NULL)
goto done;
if (is_resident)
{
if (bitmap_len > (at->mft->data->mft_size << GRUB_NTFS_BLK_SHR))
{
grub_error (GRUB_ERR_BAD_FS, "resident bitmap too large");
goto done;
}
if (cur_pos >= at->mft->buf + (at->mft->data->mft_size << GRUB_NTFS_BLK_SHR))
{
grub_error (GRUB_ERR_BAD_FS, "resident bitmap out of range");
goto done;
}
if (res_attr_data_off (cur_pos) + res_attr_data_len (cur_pos) >
(grub_addr_t) at->mft->buf + (at->mft->data->mft_size << GRUB_NTFS_BLK_SHR) - (grub_addr_t) cur_pos)
{
grub_error (GRUB_ERR_BAD_FS, "resident bitmap out of range");
goto done;
}
grub_memcpy (bmp, cur_pos + res_attr_data_off (cur_pos),
bitmap_len);
}
else
{
if (read_data (at, cur_pos, bmp, 0, bitmap_len, 0, 0, 0))
{
grub_error (GRUB_ERR_BAD_FS,
"fails to read non-resident $BITMAP");
goto done;
}
bitmap_len = u32at (cur_pos, 0x30);
}
bitmap = bmp;
break;
}
}
free_attr (at);
cur_pos = locate_attr (at, mft, GRUB_NTFS_AT_INDEX_ALLOCATION);
while (cur_pos != NULL)
{
/* Non-resident, Namelen=4, Offset=0x40, Flags=0, Name="$I30" */
if ((u32at (cur_pos, 8) == 0x400401) &&
(u32at (cur_pos, 0x40) == 0x490024) &&
(u32at (cur_pos, 0x44) == 0x300033))
break;
cur_pos = find_attr (at, GRUB_NTFS_AT_INDEX_ALLOCATION);
}
if ((!cur_pos) && (bitmap))
{
grub_error (GRUB_ERR_BAD_FS, "$BITMAP without $INDEX_ALLOCATION");
goto done;
}
if (bitmap)
{
grub_disk_addr_t i;
grub_uint8_t v;
indx = grub_malloc (mft->data->idx_size << GRUB_NTFS_BLK_SHR);
if (indx == NULL)
goto done;
v = 1;
for (i = 0; i < (grub_disk_addr_t)bitmap_len * 8; i++)
{
if (*bitmap & v)
{
if ((read_attr
(at, indx, i * (mft->data->idx_size << GRUB_NTFS_BLK_SHR),
(mft->data->idx_size << GRUB_NTFS_BLK_SHR), 0, 0, 0))
|| (fixup (indx, mft->data->idx_size,
(const grub_uint8_t *) "INDX")))
goto done;
ret = list_file (mft, &indx[0x18 + u16at (indx, 0x18)],
indx + (mft->data->idx_size << GRUB_NTFS_BLK_SHR),
hook, hook_data);
if (ret)
goto done;
}
v <<= 1;
if (!v)
{
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;
grub_uint32_t spc;
if (!disk)
goto fail;
data = (struct grub_ntfs_data *) grub_zalloc (sizeof (*data));
if (!data)
goto fail;
data->disk = disk;
/* Read the BPB. */
if (grub_disk_read (disk, 0, 0, sizeof (bpb), &bpb))
goto fail;
if (grub_memcmp ((char *) &bpb.oem_name, "NTFS", 4) != 0
|| bpb.sectors_per_cluster == 0
|| (bpb.sectors_per_cluster & (bpb.sectors_per_cluster - 1)) != 0
|| bpb.bytes_per_sector == 0
|| (bpb.bytes_per_sector & (bpb.bytes_per_sector - 1)) != 0)
goto fail;
spc = (((grub_uint32_t) bpb.sectors_per_cluster
* (grub_uint32_t) grub_le_to_cpu16 (bpb.bytes_per_sector))
>> GRUB_NTFS_BLK_SHR);
if (spc == 0)
goto fail;
for (data->log_spc = 0; (1U << data->log_spc) < spc; data->log_spc++);
if (bpb.clusters_per_mft > 0)
data->mft_size = ((grub_disk_addr_t) bpb.clusters_per_mft) << data->log_spc;
else if (-bpb.clusters_per_mft < GRUB_NTFS_BLK_SHR || -bpb.clusters_per_mft >= 31)
goto fail;
else
data->mft_size = 1ULL << (-bpb.clusters_per_mft - GRUB_NTFS_BLK_SHR);
if (bpb.clusters_per_index > 0)
data->idx_size = (((grub_disk_addr_t) bpb.clusters_per_index)
<< data->log_spc);
else if (-bpb.clusters_per_index < GRUB_NTFS_BLK_SHR || -bpb.clusters_per_index >= 31)
goto fail;
else
data->idx_size = 1ULL << (-bpb.clusters_per_index - GRUB_NTFS_BLK_SHR);
data->mft_start = grub_le_to_cpu64 (bpb.mft_lcn) << data->log_spc;
if ((data->mft_size > GRUB_NTFS_MAX_MFT) || (data->idx_size > GRUB_NTFS_MAX_IDX))
goto fail;
data->mmft.data = data;
data->cmft.data = data;
data->mmft.buf = grub_malloc (data->mft_size << GRUB_NTFS_BLK_SHR);
if (!data->mmft.buf)
goto fail;
if (grub_disk_read
(disk, data->mft_start, 0, data->mft_size << GRUB_NTFS_BLK_SHR, data->mmft.buf))
goto fail;
data->uuid = grub_le_to_cpu64 (bpb.num_serial);
if (fixup (data->mmft.buf, data->mft_size, (const grub_uint8_t *) "FILE"))
goto fail;
if (!locate_attr (&data->mmft.attr, &data->mmft, GRUB_NTFS_AT_DATA))
goto fail;
if (init_file (&data->cmft, GRUB_NTFS_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);
grub_free (data);
}
return 0;
}
/* Context for grub_ntfs_dir. */
struct grub_ntfs_dir_ctx
{
grub_fs_dir_hook_t hook;
void *hook_data;
};
/* Helper for grub_ntfs_dir. */
static int
grub_ntfs_dir_iter (const char *filename, enum grub_fshelp_filetype filetype,
grub_fshelp_node_t node, void *data)
{
struct grub_ntfs_dir_ctx *ctx = data;
struct grub_dirhook_info info;
grub_memset (&info, 0, sizeof (info));
info.dir = ((filetype & GRUB_FSHELP_TYPE_MASK) == GRUB_FSHELP_DIR);
info.mtimeset = 1;
info.mtime = grub_divmod64 (node->mtime, 10000000, 0)
- 86400ULL * 365 * (1970 - 1601)
- 86400ULL * ((1970 - 1601) / 4) + 86400ULL * ((1970 - 1601) / 100);
grub_free (node);
return ctx->hook (filename, &info, ctx->hook_data);
}
static grub_err_t
grub_ntfs_dir (grub_device_t device, const char *path,
grub_fs_dir_hook_t hook, void *hook_data)
{
struct grub_ntfs_dir_ctx ctx = { hook, hook_data };
struct grub_ntfs_data *data = 0;
struct grub_fshelp_node *fdiro = 0;
grub_dl_ref (my_mod);
data = grub_ntfs_mount (device->disk);
if (!data)
goto fail;
grub_fshelp_find_file (path, &data->cmft, &fdiro, grub_ntfs_iterate_dir,
grub_ntfs_read_symlink, GRUB_FSHELP_DIR);
if (grub_errno)
goto fail;
grub_ntfs_iterate_dir (fdiro, grub_ntfs_dir_iter, &ctx);
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);
}
grub_dl_unref (my_mod);
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;
grub_dl_ref (my_mod);
data = grub_ntfs_mount (file->device->disk);
if (!data)
goto fail;
grub_fshelp_find_file (name, &data->cmft, &mft, grub_ntfs_iterate_dir,
grub_ntfs_read_symlink, 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);
}
grub_dl_unref (my_mod);
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;
read_attr (&mft->attr, (grub_uint8_t *) buf, file->offset, len, 1,
file->read_hook, file->read_hook_data);
return (grub_errno) ? -1 : (grub_ssize_t) 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);
}
grub_dl_unref (my_mod);
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;
grub_uint8_t *pa;
grub_err_t err;
grub_dl_ref (my_mod);
*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 << GRUB_NTFS_BLK_SHR);
if (mft->buf == NULL)
goto fail;
if (read_mft (mft->data, mft->buf, mft->ino))
goto fail;
}
err = init_attr (&mft->attr, mft);
if (err != GRUB_ERR_NONE)
return err;
pa = find_attr (&mft->attr, GRUB_NTFS_AT_VOLUME_NAME);
if (pa >= mft->buf + (mft->data->mft_size << GRUB_NTFS_BLK_SHR))
{
grub_error (GRUB_ERR_BAD_FS, "can\'t parse volume label");
goto fail;
}
if (mft->buf + (mft->data->mft_size << GRUB_NTFS_BLK_SHR) - pa < 0x16)
{
grub_error (GRUB_ERR_BAD_FS, "can\'t parse volume label");
goto fail;
}
if ((pa) && (pa[8] == 0) && (res_attr_data_len (pa)))
{
int len;
len = res_attr_data_len (pa) / 2;
pa += res_attr_data_off (pa);
if (mft->buf + (mft->data->mft_size << GRUB_NTFS_BLK_SHR) - pa >= 2 * len)
*label = get_utf8 (pa, len);
else
grub_error (GRUB_ERR_BAD_FS, "can\'t parse volume label");
}
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);
}
grub_dl_unref (my_mod);
return grub_errno;
}
static grub_err_t
grub_ntfs_uuid (grub_device_t device, char **uuid)
{
struct grub_ntfs_data *data;
grub_disk_t disk = device->disk;
grub_dl_ref (my_mod);
data = grub_ntfs_mount (disk);
if (data)
{
char *ptr;
*uuid = grub_xasprintf ("%016llx", (unsigned long long) data->uuid);
if (*uuid)
for (ptr = *uuid; *ptr; ptr++)
*ptr = grub_toupper (*ptr);
free_file (&data->mmft);
free_file (&data->cmft);
grub_free (data);
}
else
*uuid = NULL;
grub_dl_unref (my_mod);
return grub_errno;
}
static struct grub_fs grub_ntfs_fs =
{
.name = "ntfs",
.fs_dir = grub_ntfs_dir,
.fs_open = grub_ntfs_open,
.fs_read = grub_ntfs_read,
.fs_close = grub_ntfs_close,
.fs_label = grub_ntfs_label,
.fs_uuid = grub_ntfs_uuid,
#ifdef GRUB_UTIL
.reserved_first_sector = 1,
.blocklist_install = 1,
#endif
.next = 0
};
GRUB_MOD_INIT (ntfs)
{
if (!grub_is_lockdown ())
{
grub_ntfs_fs.mod = mod;
grub_fs_register (&grub_ntfs_fs);
}
my_mod = mod;
}
GRUB_MOD_FINI (ntfs)
{
if (!grub_is_lockdown ())
grub_fs_unregister (&grub_ntfs_fs);
}
Reference in New Issue View Git Blame Copy Permalink