2009-08-23 Robert Millan <rmh.grub@aybabtu.com>
* partmap/pc.c: Rename to ...
* partmap/msdos.c: ... this. Update all users.
(grub_pc_partition_map): Rename to ...
(grub_msdos_partition_map): ... this. Update all users.
* parttool/pcpart.c: Rename to ...
* parttool/msdospart.c: ... this. Update all users.
* include/grub/pc_partition.h: Rename to ...
* include/grub/msdos_partition.h: ... this. Update all users.
(grub_pc_partition_bsd_entry): Rename to ...
(grub_msdos_partition_bsd_entry): ... this. Update all users.
(grub_pc_partition_disk_label): Rename to ...
(grub_msdos_partition_disk_label): ... this. Update all users.
(grub_pc_partition_entry): Rename to ...
(grub_msdos_partition_entry): ... this. Update all users.
(grub_pc_partition_mbr): Rename to ...
(grub_msdos_partition_mbr): ... this. Update all users.
(grub_pc_partition): Rename to ...
(grub_msdos_partition): ... this. Update all users.
(grub_pc_partition_is_empty): Rename to ...
(grub_msdos_partition_is_empty): ... this. Update all users.
(grub_pc_partition_is_extended): Rename to ...
(grub_msdos_partition_is_extended): ... this. Update all users.
(grub_pc_partition_is_bsd): Rename to ...
(grub_msdos_partition_is_bsd): ... this. Update all users.
* conf/common.rmk (amiga_mod_SOURCES, amiga_mod_CFLAGS)
(amiga_mod_LDFLAGS, apple_mod_SOURCES, apple_mod_CFLAGS)
(apple_mod_LDFLAGS, msdos_mod_SOURCES, msdos_mod_CFLAGS)
(msdos_mod_LDFLAGS, sun_mod_SOURCES, sun_mod_CFLAGS)
(sun_mod_LDFLAGS, acorn_mod_SOURCES, acorn_mod_CFLAGS)
(acorn_mod_LDFLAGS, gpt_mod_SOURCES, gpt_mod_CFLAGS)
(gpt_mod_LDFLAGS): Rename to ...
(part_amiga_mod_SOURCES, part_amiga_mod_CFLAGS, part_amiga_mod_LDFLAGS)
(part_apple_mod_SOURCES, part_apple_mod_CFLAGS, part_apple_mod_LDFLAGS)
(part_msdos_mod_SOURCES, part_msdos_mod_CFLAGS, part_msdos_mod_LDFLAGS)
(part_sun_mod_SOURCES, part_sun_mod_CFLAGS, part_sun_mod_LDFLAGS)
(part_acorn_mod_SOURCES, part_acorn_mod_CFLAGS, part_acorn_mod_LDFLAGS)
(part_gpt_mod_SOURCES, part_gpt_mod_CFLAGS)
(part_gpt_mod_LDFLAGS): ... this.
(pkglib_MODULES): Prefix partition modules with `part_'. Rename
`pcpart.mod' to `msdospart.mod'.
(pcpart_mod_SOURCES, pcpart_mod_CFLAGS, pcpart_mod_LDFLAGS): Rename
to ...
(msdospart_mod_SOURCES, msdospart_mod_CFLAGS)
(msdospart_mod_LDFLAGS): ... this.
This commit is contained in:
robertmh
parent
c11fded5f2
commit
71acf5e54b
19 changed files with 164 additions and 115 deletions
320
partmap/msdos.c
Normal file
320
partmap/msdos.c
Normal file
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@ -0,0 +1,320 @@
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/* pc.c - Read PC style partition tables. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/partition.h>
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#include <grub/msdos_partition.h>
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#include <grub/disk.h>
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#include <grub/mm.h>
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#include <grub/misc.h>
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#include <grub/dl.h>
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static struct grub_partition_map grub_msdos_partition_map;
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/* Parse the partition representation in STR and return a partition. */
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static grub_partition_t
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grub_partition_parse (const char *str)
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{
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grub_partition_t p;
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struct grub_msdos_partition *pcdata;
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char *s = (char *) str;
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p = (grub_partition_t) grub_malloc (sizeof (*p));
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if (! p)
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return 0;
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pcdata = (struct grub_msdos_partition *) grub_malloc (sizeof (*pcdata));
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if (! pcdata)
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goto fail;
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p->data = pcdata;
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p->partmap = &grub_msdos_partition_map;
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/* Initialize some of the fields with invalid values. */
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pcdata->bsd_part = pcdata->dos_type = pcdata->bsd_type = p->index = -1;
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/* Get the DOS partition number. The number is counted from one for
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the user interface, and from zero internally. */
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pcdata->dos_part = grub_strtoul (s, &s, 0) - 1;
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if (grub_errno)
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{
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/* Not found. Maybe only a BSD label is specified. */
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pcdata->dos_part = -1;
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grub_errno = GRUB_ERR_NONE;
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}
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else if (*s == ',')
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s++;
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if (*s)
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{
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if (*s >= 'a' && *s <= 'h')
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{
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pcdata->bsd_part = *s - 'a';
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s++;
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}
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if (*s)
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goto fail;
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}
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if (pcdata->dos_part == -1 && pcdata->bsd_part == -1)
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goto fail;
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return p;
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fail:
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grub_free (p);
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grub_free (pcdata);
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grub_error (GRUB_ERR_BAD_FILENAME, "invalid partition");
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return 0;
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}
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static grub_err_t
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pc_partition_map_iterate (grub_disk_t disk,
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int (*hook) (grub_disk_t disk,
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const grub_partition_t partition))
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{
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struct grub_partition p;
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struct grub_msdos_partition pcdata;
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struct grub_msdos_partition_mbr mbr;
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struct grub_msdos_partition_disk_label label;
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struct grub_disk raw;
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/* Enforce raw disk access. */
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raw = *disk;
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raw.partition = 0;
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p.offset = 0;
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pcdata.ext_offset = 0;
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pcdata.dos_part = -1;
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p.data = &pcdata;
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p.partmap = &grub_msdos_partition_map;
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while (1)
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{
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int i;
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struct grub_msdos_partition_entry *e;
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/* Read the MBR. */
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if (grub_disk_read (&raw, p.offset, 0, sizeof (mbr), &mbr))
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goto finish;
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/* Check if it is valid. */
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if (mbr.signature != grub_cpu_to_le16 (GRUB_PC_PARTITION_SIGNATURE))
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return grub_error (GRUB_ERR_BAD_PART_TABLE, "no signature");
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for (i = 0; i < 4; i++)
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if (mbr.entries[i].flag & 0x7f)
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return grub_error (GRUB_ERR_BAD_PART_TABLE, "bad boot flag");
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/* Analyze DOS partitions. */
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for (p.index = 0; p.index < 4; p.index++)
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{
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e = mbr.entries + p.index;
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p.start = p.offset + grub_le_to_cpu32 (e->start);
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p.len = grub_le_to_cpu32 (e->length);
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pcdata.bsd_part = -1;
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pcdata.dos_type = e->type;
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pcdata.bsd_type = -1;
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grub_dprintf ("partition",
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"partition %d: flag 0x%x, type 0x%x, start 0x%llx, len 0x%llx\n",
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p.index, e->flag, pcdata.dos_type,
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(unsigned long long) p.start,
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(unsigned long long) p.len);
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/* If this is a GPT partition, this MBR is just a dummy. */
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if (e->type == GRUB_PC_PARTITION_TYPE_GPT_DISK && p.index == 0)
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return grub_error (GRUB_ERR_BAD_PART_TABLE, "dummy mbr");
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/* If this partition is a normal one, call the hook. */
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if (! grub_msdos_partition_is_empty (e->type)
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&& ! grub_msdos_partition_is_extended (e->type))
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{
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pcdata.dos_part++;
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if (hook (disk, &p))
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return 1;
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/* Check if this is a BSD partition. */
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if (grub_msdos_partition_is_bsd (e->type))
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{
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/* Check if the BSD label is within the DOS partition. */
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if (p.len <= GRUB_PC_PARTITION_BSD_LABEL_SECTOR)
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{
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grub_dprintf ("partition", "no space for disk label\n");
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continue;
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}
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/* Read the BSD label. */
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if (grub_disk_read (&raw,
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(p.start
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+ GRUB_PC_PARTITION_BSD_LABEL_SECTOR),
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0,
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sizeof (label),
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&label))
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goto finish;
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/* Check if it is valid. */
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if (label.magic
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!= grub_cpu_to_le32 (GRUB_PC_PARTITION_BSD_LABEL_MAGIC))
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{
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grub_dprintf ("partition",
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"invalid disk label magic 0x%x on partition %d\n",
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label.magic, p.index);
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continue;
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}
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for (pcdata.bsd_part = 0;
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pcdata.bsd_part < grub_cpu_to_le16 (label.num_partitions);
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pcdata.bsd_part++)
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{
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struct grub_msdos_partition_bsd_entry *be
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= label.entries + pcdata.bsd_part;
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p.start = grub_le_to_cpu32 (be->offset);
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p.len = grub_le_to_cpu32 (be->size);
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pcdata.bsd_type = be->fs_type;
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if (be->fs_type != GRUB_PC_PARTITION_BSD_TYPE_UNUSED)
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if (hook (disk, &p))
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return 1;
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}
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}
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}
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else if (pcdata.dos_part < 4)
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/* If this partition is a logical one, shouldn't increase the
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partition number. */
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pcdata.dos_part++;
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}
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/* Find an extended partition. */
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for (i = 0; i < 4; i++)
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{
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e = mbr.entries + i;
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if (grub_msdos_partition_is_extended (e->type))
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{
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p.offset = pcdata.ext_offset + grub_le_to_cpu32 (e->start);
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if (! pcdata.ext_offset)
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pcdata.ext_offset = p.offset;
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break;
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}
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}
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/* If no extended partition, the end. */
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if (i == 4)
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break;
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}
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finish:
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return grub_errno;
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}
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static grub_partition_t
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pc_partition_map_probe (grub_disk_t disk, const char *str)
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{
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grub_partition_t p;
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struct grub_msdos_partition *pcdata;
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auto int find_func (grub_disk_t d, const grub_partition_t partition);
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int find_func (grub_disk_t d __attribute__ ((unused)),
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const grub_partition_t partition)
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{
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struct grub_msdos_partition *partdata = partition->data;
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if ((pcdata->dos_part == partdata->dos_part || pcdata->dos_part == -1)
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&& pcdata->bsd_part == partdata->bsd_part)
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{
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grub_memcpy (p, partition, sizeof (*p));
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p->data = pcdata;
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grub_memcpy (pcdata, partdata, sizeof (*pcdata));
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return 1;
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}
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return 0;
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}
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p = grub_partition_parse (str);
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if (! p)
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return 0;
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pcdata = p->data;
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pc_partition_map_iterate (disk, find_func);
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if (grub_errno)
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goto fail;
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if (p->index < 0)
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{
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grub_error (GRUB_ERR_BAD_DEVICE, "no such partition");
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goto fail;
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}
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return p;
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fail:
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grub_free (p);
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grub_free (pcdata);
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return 0;
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}
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static char *
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pc_partition_map_get_name (const grub_partition_t p)
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{
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char *name;
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struct grub_msdos_partition *pcdata = p->data;
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name = grub_malloc (13);
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if (! name)
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return 0;
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if (pcdata->bsd_part < 0)
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grub_sprintf (name, "%d", pcdata->dos_part + 1);
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else if (pcdata->dos_part < 0)
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grub_sprintf (name, "%c", pcdata->bsd_part + 'a');
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else
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grub_sprintf (name, "%d,%c", pcdata->dos_part + 1, pcdata->bsd_part + 'a');
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return name;
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}
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/* Partition map type. */
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static struct grub_partition_map grub_msdos_partition_map =
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{
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.name = "msdos_partition_map",
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.iterate = pc_partition_map_iterate,
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.probe = pc_partition_map_probe,
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.get_name = pc_partition_map_get_name
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};
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GRUB_MOD_INIT(pc_partition_map)
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{
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grub_partition_map_register (&grub_msdos_partition_map);
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}
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GRUB_MOD_FINI(pc_partition_map)
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{
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grub_partition_map_unregister (&grub_msdos_partition_map);
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}
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