*
* Re-organised Feb 1998 Russell King
*/
-
+#include <linux/msdos_fs.h>
#include "check.h"
#include "msdos.h"
*/
#include <asm/unaligned.h>
-#define SYS_IND(p) (get_unaligned(&p->sys_ind))
-#define NR_SECTS(p) ({ __le32 __a = get_unaligned(&p->nr_sects); \
- le32_to_cpu(__a); \
- })
+#define SYS_IND(p) get_unaligned(&p->sys_ind)
-#define START_SECT(p) ({ __le32 __a = get_unaligned(&p->start_sect); \
- le32_to_cpu(__a); \
- })
+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)
{
#define AIX_LABEL_MAGIC2 0xC2
#define AIX_LABEL_MAGIC3 0xD4
#define AIX_LABEL_MAGIC4 0xC1
-static int aix_magic_present(unsigned char *p, struct block_device *bdev)
+static int aix_magic_present(struct parsed_partitions *state, unsigned char *p)
{
struct partition *pt = (struct partition *) (p + 0x1be);
Sector sect;
is_extended_partition(pt))
return 0;
}
- d = read_dev_sector(bdev, 7, §);
+ d = read_part_sector(state, 7, §);
if (d) {
if (d[0] == '_' && d[1] == 'L' && d[2] == 'V' && d[3] == 'M')
ret = 1;
* only for the actual data partitions.
*/
-static void
-parse_extended(struct parsed_partitions *state, struct block_device *bdev,
- u32 first_sector, u32 first_size)
+static void parse_extended(struct parsed_partitions *state,
+ sector_t first_sector, sector_t first_size)
{
struct partition *p;
Sector sect;
unsigned char *data;
- u32 this_sector, this_size;
- int sector_size = bdev_hardsect_size(bdev) / 512;
+ 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;
return;
if (state->next == state->limit)
return;
- data = read_dev_sector(bdev, this_sector, §);
+ data = read_part_sector(state, this_sector, §);
if (!data)
return;
* First process the data partition(s)
*/
for (i=0; i<4; i++, p++) {
- u32 offs, size, next;
- if (!NR_SECTS(p) || is_extended_partition(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;
+ offs = start_sect(p)*sector_size;
+ size = nr_sects(p)*sector_size;
next = this_sector + offs;
if (i >= 2) {
if (offs + size > this_size)
*/
p -= 4;
for (i=0; i<4; i++, p++)
- if (NR_SECTS(p) && is_extended_partition(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;
+ this_sector = first_sector + start_sect(p) * sector_size;
+ this_size = nr_sects(p) * sector_size;
put_dev_sector(sect);
}
done:
/* 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, struct block_device *bdev,
- u32 offset, u32 size, int origin)
+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 = (struct solaris_x86_vtoc *)read_dev_sector(bdev, offset+1, §);
+ v = read_part_sector(state, offset + 1, §);
if (!v)
return;
if (le32_to_cpu(v->v_sanity) != SOLARIS_X86_VTOC_SANE) {
put_dev_sector(sect);
return;
}
- for (i=0; i<SOLARIS_X86_NUMSLICE && state->next<state->limit; i++) {
+ /* 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];
if (s->s_size == 0)
continue;
* 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, struct block_device *bdev,
- u32 offset, u32 size, int origin, char *flavour,
- int max_partitions)
+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;
- l = (struct bsd_disklabel *)read_dev_sector(bdev, offset+1, §);
+ l = read_part_sector(state, offset + 1, §);
if (!l)
return;
if (le32_to_cpu(l->d_magic) != BSD_DISKMAGIC) {
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++) {
- u32 bsd_start, bsd_size;
+ sector_t bsd_start, bsd_size;
if (state->next == state->limit)
break;
}
#endif
-static void
-parse_freebsd(struct parsed_partitions *state, struct block_device *bdev,
- u32 offset, u32 size, int origin)
+static void parse_freebsd(struct parsed_partitions *state,
+ sector_t offset, sector_t size, int origin)
{
#ifdef CONFIG_BSD_DISKLABEL
- parse_bsd(state, bdev, offset, size, origin,
- "bsd", BSD_MAXPARTITIONS);
+ parse_bsd(state, offset, size, origin, "bsd", BSD_MAXPARTITIONS);
#endif
}
-static void
-parse_netbsd(struct parsed_partitions *state, struct block_device *bdev,
- u32 offset, u32 size, int origin)
+static void parse_netbsd(struct parsed_partitions *state,
+ sector_t offset, sector_t size, int origin)
{
#ifdef CONFIG_BSD_DISKLABEL
- parse_bsd(state, bdev, offset, size, origin,
- "netbsd", BSD_MAXPARTITIONS);
+ parse_bsd(state, offset, size, origin, "netbsd", BSD_MAXPARTITIONS);
#endif
}
-static void
-parse_openbsd(struct parsed_partitions *state, struct block_device *bdev,
- u32 offset, u32 size, int origin)
+static void parse_openbsd(struct parsed_partitions *state,
+ sector_t offset, sector_t size, int origin)
{
#ifdef CONFIG_BSD_DISKLABEL
- parse_bsd(state, bdev, offset, size, origin,
- "openbsd", OPENBSD_MAXPARTITIONS);
+ 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, struct block_device *bdev,
- u32 offset, u32 size, int origin)
+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 = (struct unixware_disklabel *)read_dev_sector(bdev, offset+29, §);
+ l = read_part_sector(state, offset + 29, §);
if (!l)
return;
if (le32_to_cpu(l->d_magic) != UNIXWARE_DISKMAGIC ||
if (p->s_label != UNIXWARE_FS_UNUSED)
put_partition(state, state->next++,
- START_SECT(p), NR_SECTS(p));
+ le32_to_cpu(p->start_sect),
+ le32_to_cpu(p->nr_sects));
p++;
}
put_dev_sector(sect);
* Anand Krishnamurthy <anandk@wiproge.med.ge.com>
* Rajeev V. Pillai <rajeevvp@yahoo.com>
*/
-static void
-parse_minix(struct parsed_partitions *state, struct block_device *bdev,
- u32 offset, u32 size, int origin)
+static void parse_minix(struct parsed_partitions *state,
+ sector_t offset, sector_t size, int origin)
{
#ifdef CONFIG_MINIX_SUBPARTITION
Sector sect;
struct partition *p;
int i;
- data = read_dev_sector(bdev, offset, §);
+ data = read_part_sector(state, offset, §);
if (!data)
return;
/* add each partition in use */
if (SYS_IND(p) == MINIX_PARTITION)
put_partition(state, state->next++,
- START_SECT(p), NR_SECTS(p));
+ start_sect(p), nr_sects(p));
}
printk(" >\n");
}
static struct {
unsigned char id;
- void (*parse)(struct parsed_partitions *, struct block_device *,
- u32, u32, int);
+ void (*parse)(struct parsed_partitions *, sector_t, sector_t, int);
} subtypes[] = {
{FREEBSD_PARTITION, parse_freebsd},
{NETBSD_PARTITION, parse_netbsd},
{0, NULL},
};
-int msdos_partition(struct parsed_partitions *state, struct block_device *bdev)
+int msdos_partition(struct parsed_partitions *state)
{
- int sector_size = bdev_hardsect_size(bdev) / 512;
+ 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_dev_sector(bdev, 0, §);
+ data = read_part_sector(state, 0, §);
if (!data)
return -1;
if (!msdos_magic_present(data + 510)) {
return 0;
}
- if (aix_magic_present(data, bdev)) {
+ if (aix_magic_present(state, data)) {
put_dev_sector(sect);
printk( " [AIX]");
return 0;
p = (struct partition *) (data + 0x1be);
for (slot = 1; slot <= 4; slot++, p++) {
if (p->boot_ind != 0 && p->boot_ind != 0x80) {
- put_dev_sector(sect);
- return 0;
+ /*
+ * 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)) {
+ printk("\n");
+ put_dev_sector(sect);
+ return 1;
+ } else {
+ put_dev_sector(sect);
+ return 0;
+ }
}
}
state->next = 5;
for (slot = 1 ; slot <= 4 ; slot++, p++) {
- u32 start = START_SECT(p)*sector_size;
- u32 size = NR_SECTS(p)*sector_size;
+ 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 */
- put_partition(state, slot, start, size == 1 ? 1 : 2);
+ /*
+ * 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);
+
printk(" <");
- parse_extended(state, bdev, start, size);
+ parse_extended(state, start, size);
printk(" >");
continue;
}
put_partition(state, slot, start, size);
if (SYS_IND(p) == LINUX_RAID_PARTITION)
- state->parts[slot].flags = 1;
+ state->parts[slot].flags = ADDPART_FLAG_RAID;
if (SYS_IND(p) == DM6_PARTITION)
printk("[DM]");
if (SYS_IND(p) == EZD_PARTITION)
unsigned char id = SYS_IND(p);
int n;
- if (!NR_SECTS(p))
+ 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, bdev, START_SECT(p)*sector_size,
- NR_SECTS(p)*sector_size, slot);
+ subtypes[n].parse(state, start_sect(p) * sector_size,
+ nr_sects(p) * sector_size, slot);
}
put_dev_sector(sect);
return 1;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff