diff options
Diffstat (limited to 'grub-core/fs/ntfs.c')
| -rw-r--r-- | grub-core/fs/ntfs.c | 1117 |
1 files changed, 1117 insertions, 0 deletions
diff --git a/grub-core/fs/ntfs.c b/grub-core/fs/ntfs.c new file mode 100644 index 0000000..e01ce34 --- /dev/null +++ b/grub-core/fs/ntfs.c @@ -0,0 +1,1117 @@ +/* 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/>. + */ + +#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> + +GRUB_MOD_LICENSE ("GPLv3+"); + +static grub_dl_t my_mod; + +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; + grub_uint16_t 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, + grub_uint32_t mftno); +static grub_err_t read_attr (struct grub_ntfs_attr *at, char *dest, + grub_disk_addr_t ofs, grub_size_t 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, + grub_disk_addr_t ofs, grub_size_t 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]) + { + int 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)) + { + 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, grub_disk_addr_t * val, int sig) +{ + grub_disk_addr_t 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; +} + +grub_err_t +grub_ntfs_read_run_list (struct grub_ntfs_rlst * ctx) +{ + int c1, c2; + grub_disk_addr_t 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_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 & RF_BLNK) ? 0 : (block - + ctx->curr_vcn + ctx->curr_lcn); +} + +static grub_err_t +read_data (struct grub_ntfs_attr *at, char *pa, char *dest, + grub_disk_addr_t ofs, grub_size_t len, int cached, + void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector, + unsigned offset, + unsigned length)) +{ + grub_disk_addr_t vcn; + struct grub_ntfs_rlst cc, *ctx; + + 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) + { + grub_disk_addr_t 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_LOG_LEN) * (COM_SEC / ctx->comp.spc); + ctx->target_vcn &= ~0xF; + } + else + vcn = ctx->target_vcn = grub_divmod64 (ofs >> BLK_SHR, ctx->comp.spc, 0); + + ctx->next_vcn = u32at (pa, 0x10); + ctx->curr_lcn = 0; + while (ctx->next_vcn <= ctx->target_vcn) + { + if (grub_ntfs_read_run_list (ctx)) + return grub_errno; + } + + if (at->flags & AF_GPOS) + { + grub_disk_addr_t st0, st1; + grub_uint32_t m; + + grub_divmod64 (ofs >> BLK_SHR, ctx->comp.spc, &m); + + st0 = + (ctx->target_vcn - ctx->curr_vcn + ctx->curr_lcn) * ctx->comp.spc + m; + st1 = st0 + 1; + if (st1 == + (ctx->next_vcn - ctx->curr_vcn + ctx->curr_lcn) * ctx->comp.spc) + { + if (grub_ntfs_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; + } + + 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, grub_disk_addr_t ofs, + grub_size_t 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; + grub_disk_addr_t vcn; + + vcn = grub_divmod64 (ofs, at->mft->data->spc << BLK_SHR, 0); + 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, grub_uint32_t mftno) +{ + if (read_attr + (&data->mmft.attr, buf, mftno * ((grub_disk_addr_t) 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 = u64at (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, namespace; + + if (pos[0xC] & 2) /* end signature */ + break; + + np = pos + 0x50; + ns = (unsigned char) *(np++); + namespace = *(np++); + + /* + * 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; + + 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_zalloc (sizeof (struct grub_ntfs_file)); + if (!fdiro) + return 0; + + 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 (namespace) + type |= GRUB_FSHELP_CASE_INSENSITIVE; + + 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 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; + 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)) + { + int is_resident = (cur_pos[8] == 0); + + bitmap_len = ((is_resident) ? u32at (cur_pos, 0x10) : + u32at (cur_pos, 0x28)); + + bmp = grub_malloc (bitmap_len); + if (bmp == NULL) + goto done; + + if (is_resident) + { + grub_memcpy (bmp, (char *) (cur_pos + u16at (cur_pos, 0x14)), + bitmap_len); + } + else + { + if (read_data (at, cur_pos, bmp, 0, bitmap_len, 0, 0)) + { + grub_error (GRUB_ERR_BAD_FS, + "fails to read non-resident $BITMAP"); + goto done; + } + bitmap_len = u32at (cur_pos, 0x30); + } + + bitmap = (unsigned char *) bmp; + break; + } + } + + free_attr (at); + cur_pos = locate_attr (at, mft, AT_INDEX_ALLOCATION); + while (cur_pos != NULL) + { + /* Non-resident, Namelen=4, Offset=0x40, Flags=0, Name="$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) + { + grub_disk_addr_t v, i; + + indx = grub_malloc (mft->data->idx_size << 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 << 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_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)) + 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)) + 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; + + data->uuid = grub_le_to_cpu64 (bpb.num_serial); + + 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); + grub_free (data); + } + return 0; +} + +static grub_err_t +grub_ntfs_dir (grub_device_t device, const char *path, + int (*hook) (const char *filename, + const struct grub_dirhook_info *info)) +{ + 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) + { + struct grub_dirhook_info info; + grub_memset (&info, 0, sizeof (info)); + info.dir = ((filetype & GRUB_FSHELP_TYPE_MASK) == GRUB_FSHELP_DIR); + grub_free (node); + return hook (filename, &info); + } + + 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, + 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); + } + + 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, + 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); + } + + 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, 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); + } + + 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; + char *pa; + + 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 << 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); + } + + 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); + } + else + *uuid = NULL; + + grub_dl_unref (my_mod); + + grub_free (data); + + 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, + .uuid = grub_ntfs_uuid, +#ifdef GRUB_UTIL + .reserved_first_sector = 1, +#endif + .next = 0 +}; + +GRUB_MOD_INIT (ntfs) +{ + grub_fs_register (&grub_ntfs_fs); + my_mod = mod; +} + +GRUB_MOD_FINI (ntfs) +{ + grub_fs_unregister (&grub_ntfs_fs); +} |