move fs/partitions to block/

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 0 insertions, 552 deletions

diff --git a/fs/partitions/msdos.c b/fs/partitions/msdos.c
deleted file mode 100644
index 5f79a6677c6..00000000000
--- a/fs/partitions/msdos.c
+++ /dev/null
@@ -1,552 +0,0 @@
-/*
- *  fs/partitions/msdos.c
- *
- *  Code extracted from drivers/block/genhd.c
- *  Copyright (C) 1991-1998  Linus Torvalds
- *
- *  Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
- *  in the early extended-partition checks and added DM partitions
- *
- *  Support for DiskManager v6.0x added by Mark Lord,
- *  with information provided by OnTrack.  This now works for linux fdisk
- *  and LILO, as well as loadlin and bootln.  Note that disks other than
- *  /dev/hda *must* have a "DOS" type 0x51 partition in the first slot (hda1).
- *
- *  More flexible handling of extended partitions - aeb, 950831
- *
- *  Check partition table on IDE disks for common CHS translations
- *
- *  Re-organised Feb 1998 Russell King
- */
-#include <linux/msdos_fs.h>
-
-#include "check.h"
-#include "msdos.h"
-#include "efi.h"
-
-/*
- * Many architectures don't like unaligned accesses, while
- * the nr_sects and start_sect partition table entries are
- * at a 2 (mod 4) address.
- */
-#include <asm/unaligned.h>
-
-#define SYS_IND(p)	get_unaligned(&p->sys_ind)
-
-static inline sector_t nr_sects(struct partition *p)
-{
-	return (sector_t)get_unaligned_le32(&p->nr_sects);
-}
-
-static inline sector_t start_sect(struct partition *p)
-{
-	return (sector_t)get_unaligned_le32(&p->start_sect);
-}
-
-static inline int is_extended_partition(struct partition *p)
-{
-	return (SYS_IND(p) == DOS_EXTENDED_PARTITION ||
-		SYS_IND(p) == WIN98_EXTENDED_PARTITION ||
-		SYS_IND(p) == LINUX_EXTENDED_PARTITION);
-}
-
-#define MSDOS_LABEL_MAGIC1	0x55
-#define MSDOS_LABEL_MAGIC2	0xAA
-
-static inline int
-msdos_magic_present(unsigned char *p)
-{
-	return (p[0] == MSDOS_LABEL_MAGIC1 && p[1] == MSDOS_LABEL_MAGIC2);
-}
-
-/* Value is EBCDIC 'IBMA' */
-#define AIX_LABEL_MAGIC1	0xC9
-#define AIX_LABEL_MAGIC2	0xC2
-#define AIX_LABEL_MAGIC3	0xD4
-#define AIX_LABEL_MAGIC4	0xC1
-static int aix_magic_present(struct parsed_partitions *state, unsigned char *p)
-{
-	struct partition *pt = (struct partition *) (p + 0x1be);
-	Sector sect;
-	unsigned char *d;
-	int slot, ret = 0;
-
-	if (!(p[0] == AIX_LABEL_MAGIC1 &&
-		p[1] == AIX_LABEL_MAGIC2 &&
-		p[2] == AIX_LABEL_MAGIC3 &&
-		p[3] == AIX_LABEL_MAGIC4))
-		return 0;
-	/* Assume the partition table is valid if Linux partitions exists */
-	for (slot = 1; slot <= 4; slot++, pt++) {
-		if (pt->sys_ind == LINUX_SWAP_PARTITION ||
-			pt->sys_ind == LINUX_RAID_PARTITION ||
-			pt->sys_ind == LINUX_DATA_PARTITION ||
-			pt->sys_ind == LINUX_LVM_PARTITION ||
-			is_extended_partition(pt))
-			return 0;
-	}
-	d = read_part_sector(state, 7, &sect);
-	if (d) {
-		if (d[0] == '_' && d[1] == 'L' && d[2] == 'V' && d[3] == 'M')
-			ret = 1;
-		put_dev_sector(sect);
-	};
-	return ret;
-}
-
-/*
- * Create devices for each logical partition in an extended partition.
- * The logical partitions form a linked list, with each entry being
- * a partition table with two entries.  The first entry
- * is the real data partition (with a start relative to the partition
- * table start).  The second is a pointer to the next logical partition
- * (with a start relative to the entire extended partition).
- * We do not create a Linux partition for the partition tables, but
- * only for the actual data partitions.
- */
-
-static void parse_extended(struct parsed_partitions *state,
-			   sector_t first_sector, sector_t first_size)
-{
-	struct partition *p;
-	Sector sect;
-	unsigned char *data;
-	sector_t this_sector, this_size;
-	sector_t sector_size = bdev_logical_block_size(state->bdev) / 512;
-	int loopct = 0;		/* number of links followed
-				   without finding a data partition */
-	int i;
-
-	this_sector = first_sector;
-	this_size = first_size;
-
-	while (1) {
-		if (++loopct > 100)
-			return;
-		if (state->next == state->limit)
-			return;
-		data = read_part_sector(state, this_sector, &sect);
-		if (!data)
-			return;
-
-		if (!msdos_magic_present(data + 510))
-			goto done; 
-
-		p = (struct partition *) (data + 0x1be);
-
-		/*
-		 * Usually, the first entry is the real data partition,
-		 * the 2nd entry is the next extended partition, or empty,
-		 * and the 3rd and 4th entries are unused.
-		 * However, DRDOS sometimes has the extended partition as
-		 * the first entry (when the data partition is empty),
-		 * and OS/2 seems to use all four entries.
-		 */
-
-		/* 
-		 * First process the data partition(s)
-		 */
-		for (i=0; i<4; i++, p++) {
-			sector_t offs, size, next;
-			if (!nr_sects(p) || is_extended_partition(p))
-				continue;
-
-			/* Check the 3rd and 4th entries -
-			   these sometimes contain random garbage */
-			offs = start_sect(p)*sector_size;
-			size = nr_sects(p)*sector_size;
-			next = this_sector + offs;
-			if (i >= 2) {
-				if (offs + size > this_size)
-					continue;
-				if (next < first_sector)
-					continue;
-				if (next + size > first_sector + first_size)
-					continue;
-			}
-
-			put_partition(state, state->next, next, size);
-			if (SYS_IND(p) == LINUX_RAID_PARTITION)
-				state->parts[state->next].flags = ADDPART_FLAG_RAID;
-			loopct = 0;
-			if (++state->next == state->limit)
-				goto done;
-		}
-		/*
-		 * Next, process the (first) extended partition, if present.
-		 * (So far, there seems to be no reason to make
-		 *  parse_extended()  recursive and allow a tree
-		 *  of extended partitions.)
-		 * It should be a link to the next logical partition.
-		 */
-		p -= 4;
-		for (i=0; i<4; i++, p++)
-			if (nr_sects(p) && is_extended_partition(p))
-				break;
-		if (i == 4)
-			goto done;	 /* nothing left to do */
-
-		this_sector = first_sector + start_sect(p) * sector_size;
-		this_size = nr_sects(p) * sector_size;
-		put_dev_sector(sect);
-	}
-done:
-	put_dev_sector(sect);
-}
-
-/* james@bpgc.com: Solaris has a nasty indicator: 0x82 which also
-   indicates linux swap.  Be careful before believing this is Solaris. */
-
-static void parse_solaris_x86(struct parsed_partitions *state,
-			      sector_t offset, sector_t size, int origin)
-{
-#ifdef CONFIG_SOLARIS_X86_PARTITION
-	Sector sect;
-	struct solaris_x86_vtoc *v;
-	int i;
-	short max_nparts;
-
-	v = read_part_sector(state, offset + 1, &sect);
-	if (!v)
-		return;
-	if (le32_to_cpu(v->v_sanity) != SOLARIS_X86_VTOC_SANE) {
-		put_dev_sector(sect);
-		return;
-	}
-	{
-		char tmp[1 + BDEVNAME_SIZE + 10 + 11 + 1];
-
-		snprintf(tmp, sizeof(tmp), " %s%d: <solaris:", state->name, origin);
-		strlcat(state->pp_buf, tmp, PAGE_SIZE);
-	}
-	if (le32_to_cpu(v->v_version) != 1) {
-		char tmp[64];
-
-		snprintf(tmp, sizeof(tmp), "  cannot handle version %d vtoc>\n",
-			 le32_to_cpu(v->v_version));
-		strlcat(state->pp_buf, tmp, PAGE_SIZE);
-		put_dev_sector(sect);
-		return;
-	}
-	/* Ensure we can handle previous case of VTOC with 8 entries gracefully */
-	max_nparts = le16_to_cpu (v->v_nparts) > 8 ? SOLARIS_X86_NUMSLICE : 8;
-	for (i=0; i<max_nparts && state->next<state->limit; i++) {
-		struct solaris_x86_slice *s = &v->v_slice[i];
-		char tmp[3 + 10 + 1 + 1];
-
-		if (s->s_size == 0)
-			continue;
-		snprintf(tmp, sizeof(tmp), " [s%d]", i);
-		strlcat(state->pp_buf, tmp, PAGE_SIZE);
-		/* solaris partitions are relative to current MS-DOS
-		 * one; must add the offset of the current partition */
-		put_partition(state, state->next++,
-				 le32_to_cpu(s->s_start)+offset,
-				 le32_to_cpu(s->s_size));
-	}
-	put_dev_sector(sect);
-	strlcat(state->pp_buf, " >\n", PAGE_SIZE);
-#endif
-}
-
-#if defined(CONFIG_BSD_DISKLABEL)
-/* 
- * Create devices for BSD partitions listed in a disklabel, under a
- * dos-like partition. See parse_extended() for more information.
- */
-static void parse_bsd(struct parsed_partitions *state,
-		      sector_t offset, sector_t size, int origin, char *flavour,
-		      int max_partitions)
-{
-	Sector sect;
-	struct bsd_disklabel *l;
-	struct bsd_partition *p;
-	char tmp[64];
-
-	l = read_part_sector(state, offset + 1, &sect);
-	if (!l)
-		return;
-	if (le32_to_cpu(l->d_magic) != BSD_DISKMAGIC) {
-		put_dev_sector(sect);
-		return;
-	}
-
-	snprintf(tmp, sizeof(tmp), " %s%d: <%s:", state->name, origin, flavour);
-	strlcat(state->pp_buf, tmp, PAGE_SIZE);
-
-	if (le16_to_cpu(l->d_npartitions) < max_partitions)
-		max_partitions = le16_to_cpu(l->d_npartitions);
-	for (p = l->d_partitions; p - l->d_partitions < max_partitions; p++) {
-		sector_t bsd_start, bsd_size;
-
-		if (state->next == state->limit)
-			break;
-		if (p->p_fstype == BSD_FS_UNUSED) 
-			continue;
-		bsd_start = le32_to_cpu(p->p_offset);
-		bsd_size = le32_to_cpu(p->p_size);
-		if (offset == bsd_start && size == bsd_size)
-			/* full parent partition, we have it already */
-			continue;
-		if (offset > bsd_start || offset+size < bsd_start+bsd_size) {
-			strlcat(state->pp_buf, "bad subpartition - ignored\n", PAGE_SIZE);
-			continue;
-		}
-		put_partition(state, state->next++, bsd_start, bsd_size);
-	}
-	put_dev_sector(sect);
-	if (le16_to_cpu(l->d_npartitions) > max_partitions) {
-		snprintf(tmp, sizeof(tmp), " (ignored %d more)",
-			 le16_to_cpu(l->d_npartitions) - max_partitions);
-		strlcat(state->pp_buf, tmp, PAGE_SIZE);
-	}
-	strlcat(state->pp_buf, " >\n", PAGE_SIZE);
-}
-#endif
-
-static void parse_freebsd(struct parsed_partitions *state,
-			  sector_t offset, sector_t size, int origin)
-{
-#ifdef CONFIG_BSD_DISKLABEL
-	parse_bsd(state, offset, size, origin, "bsd", BSD_MAXPARTITIONS);
-#endif
-}
-
-static void parse_netbsd(struct parsed_partitions *state,
-			 sector_t offset, sector_t size, int origin)
-{
-#ifdef CONFIG_BSD_DISKLABEL
-	parse_bsd(state, offset, size, origin, "netbsd", BSD_MAXPARTITIONS);
-#endif
-}
-
-static void parse_openbsd(struct parsed_partitions *state,
-			  sector_t offset, sector_t size, int origin)
-{
-#ifdef CONFIG_BSD_DISKLABEL
-	parse_bsd(state, offset, size, origin, "openbsd",
-		  OPENBSD_MAXPARTITIONS);
-#endif
-}
-
-/*
- * Create devices for Unixware partitions listed in a disklabel, under a
- * dos-like partition. See parse_extended() for more information.
- */
-static void parse_unixware(struct parsed_partitions *state,
-			   sector_t offset, sector_t size, int origin)
-{
-#ifdef CONFIG_UNIXWARE_DISKLABEL
-	Sector sect;
-	struct unixware_disklabel *l;
-	struct unixware_slice *p;
-
-	l = read_part_sector(state, offset + 29, &sect);
-	if (!l)
-		return;
-	if (le32_to_cpu(l->d_magic) != UNIXWARE_DISKMAGIC ||
-	    le32_to_cpu(l->vtoc.v_magic) != UNIXWARE_DISKMAGIC2) {
-		put_dev_sector(sect);
-		return;
-	}
-	{
-		char tmp[1 + BDEVNAME_SIZE + 10 + 12 + 1];
-
-		snprintf(tmp, sizeof(tmp), " %s%d: <unixware:", state->name, origin);
-		strlcat(state->pp_buf, tmp, PAGE_SIZE);
-	}
-	p = &l->vtoc.v_slice[1];
-	/* I omit the 0th slice as it is the same as whole disk. */
-	while (p - &l->vtoc.v_slice[0] < UNIXWARE_NUMSLICE) {
-		if (state->next == state->limit)
-			break;
-
-		if (p->s_label != UNIXWARE_FS_UNUSED)
-			put_partition(state, state->next++,
-				      le32_to_cpu(p->start_sect),
-				      le32_to_cpu(p->nr_sects));
-		p++;
-	}
-	put_dev_sector(sect);
-	strlcat(state->pp_buf, " >\n", PAGE_SIZE);
-#endif
-}
-
-/*
- * Minix 2.0.0/2.0.2 subpartition support.
- * Anand Krishnamurthy <anandk@wiproge.med.ge.com>
- * Rajeev V. Pillai    <rajeevvp@yahoo.com>
- */
-static void parse_minix(struct parsed_partitions *state,
-			sector_t offset, sector_t size, int origin)
-{
-#ifdef CONFIG_MINIX_SUBPARTITION
-	Sector sect;
-	unsigned char *data;
-	struct partition *p;
-	int i;
-
-	data = read_part_sector(state, offset, &sect);
-	if (!data)
-		return;
-
-	p = (struct partition *)(data + 0x1be);
-
-	/* The first sector of a Minix partition can have either
-	 * a secondary MBR describing its subpartitions, or
-	 * the normal boot sector. */
-	if (msdos_magic_present (data + 510) &&
-	    SYS_IND(p) == MINIX_PARTITION) { /* subpartition table present */
-		char tmp[1 + BDEVNAME_SIZE + 10 + 9 + 1];
-
-		snprintf(tmp, sizeof(tmp), " %s%d: <minix:", state->name, origin);
-		strlcat(state->pp_buf, tmp, PAGE_SIZE);
-		for (i = 0; i < MINIX_NR_SUBPARTITIONS; i++, p++) {
-			if (state->next == state->limit)
-				break;
-			/* add each partition in use */
-			if (SYS_IND(p) == MINIX_PARTITION)
-				put_partition(state, state->next++,
-					      start_sect(p), nr_sects(p));
-		}
-		strlcat(state->pp_buf, " >\n", PAGE_SIZE);
-	}
-	put_dev_sector(sect);
-#endif /* CONFIG_MINIX_SUBPARTITION */
-}
-
-static struct {
-	unsigned char id;
-	void (*parse)(struct parsed_partitions *, sector_t, sector_t, int);
-} subtypes[] = {
-	{FREEBSD_PARTITION, parse_freebsd},
-	{NETBSD_PARTITION, parse_netbsd},
-	{OPENBSD_PARTITION, parse_openbsd},
-	{MINIX_PARTITION, parse_minix},
-	{UNIXWARE_PARTITION, parse_unixware},
-	{SOLARIS_X86_PARTITION, parse_solaris_x86},
-	{NEW_SOLARIS_X86_PARTITION, parse_solaris_x86},
-	{0, NULL},
-};
- 
-int msdos_partition(struct parsed_partitions *state)
-{
-	sector_t sector_size = bdev_logical_block_size(state->bdev) / 512;
-	Sector sect;
-	unsigned char *data;
-	struct partition *p;
-	struct fat_boot_sector *fb;
-	int slot;
-
-	data = read_part_sector(state, 0, &sect);
-	if (!data)
-		return -1;
-	if (!msdos_magic_present(data + 510)) {
-		put_dev_sector(sect);
-		return 0;
-	}
-
-	if (aix_magic_present(state, data)) {
-		put_dev_sector(sect);
-		strlcat(state->pp_buf, " [AIX]", PAGE_SIZE);
-		return 0;
-	}
-
-	/*
-	 * Now that the 55aa signature is present, this is probably
-	 * either the boot sector of a FAT filesystem or a DOS-type
-	 * partition table. Reject this in case the boot indicator
-	 * is not 0 or 0x80.
-	 */
-	p = (struct partition *) (data + 0x1be);
-	for (slot = 1; slot <= 4; slot++, p++) {
-		if (p->boot_ind != 0 && p->boot_ind != 0x80) {
-			/*
-			 * Even without a valid boot inidicator value
-			 * its still possible this is valid FAT filesystem
-			 * without a partition table.
-			 */
-			fb = (struct fat_boot_sector *) data;
-			if (slot == 1 && fb->reserved && fb->fats
-				&& fat_valid_media(fb->media)) {
-				strlcat(state->pp_buf, "\n", PAGE_SIZE);
-				put_dev_sector(sect);
-				return 1;
-			} else {
-				put_dev_sector(sect);
-				return 0;
-			}
-		}
-	}
-
-#ifdef CONFIG_EFI_PARTITION
-	p = (struct partition *) (data + 0x1be);
-	for (slot = 1 ; slot <= 4 ; slot++, p++) {
-		/* If this is an EFI GPT disk, msdos should ignore it. */
-		if (SYS_IND(p) == EFI_PMBR_OSTYPE_EFI_GPT) {
-			put_dev_sector(sect);
-			return 0;
-		}
-	}
-#endif
-	p = (struct partition *) (data + 0x1be);
-
-	/*
-	 * Look for partitions in two passes:
-	 * First find the primary and DOS-type extended partitions.
-	 * On the second pass look inside *BSD, Unixware and Solaris partitions.
-	 */
-
-	state->next = 5;
-	for (slot = 1 ; slot <= 4 ; slot++, p++) {
-		sector_t start = start_sect(p)*sector_size;
-		sector_t size = nr_sects(p)*sector_size;
-		if (!size)
-			continue;
-		if (is_extended_partition(p)) {
-			/*
-			 * prevent someone doing mkfs or mkswap on an
-			 * extended partition, but leave room for LILO
-			 * FIXME: this uses one logical sector for > 512b
-			 * sector, although it may not be enough/proper.
-			 */
-			sector_t n = 2;
-			n = min(size, max(sector_size, n));
-			put_partition(state, slot, start, n);
-
-			strlcat(state->pp_buf, " <", PAGE_SIZE);
-			parse_extended(state, start, size);
-			strlcat(state->pp_buf, " >", PAGE_SIZE);
-			continue;
-		}
-		put_partition(state, slot, start, size);
-		if (SYS_IND(p) == LINUX_RAID_PARTITION)
-			state->parts[slot].flags = ADDPART_FLAG_RAID;
-		if (SYS_IND(p) == DM6_PARTITION)
-			strlcat(state->pp_buf, "[DM]", PAGE_SIZE);
-		if (SYS_IND(p) == EZD_PARTITION)
-			strlcat(state->pp_buf, "[EZD]", PAGE_SIZE);
-	}
-
-	strlcat(state->pp_buf, "\n", PAGE_SIZE);
-
-	/* second pass - output for each on a separate line */
-	p = (struct partition *) (0x1be + data);
-	for (slot = 1 ; slot <= 4 ; slot++, p++) {
-		unsigned char id = SYS_IND(p);
-		int n;
-
-		if (!nr_sects(p))
-			continue;
-
-		for (n = 0; subtypes[n].parse && id != subtypes[n].id; n++)
-			;
-
-		if (!subtypes[n].parse)
-			continue;
-		subtypes[n].parse(state, start_sect(p) * sector_size,
-				  nr_sects(p) * sector_size, slot);
-	}
-	put_dev_sector(sect);
-	return 1;
-}