diff options
Diffstat (limited to 'fs/partitions/ultrix.c')
| -rw-r--r-- | fs/partitions/ultrix.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/fs/partitions/ultrix.c b/fs/partitions/ultrix.c new file mode 100644 index 000000000000..8a8d4d9db314 --- /dev/null +++ b/fs/partitions/ultrix.c @@ -0,0 +1,47 @@ +/* + * fs/partitions/ultrix.c + * + * Code extracted from drivers/block/genhd.c + * + * Re-organised Jul 1999 Russell King + */ + +#include "check.h" + +int ultrix_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + int i; + Sector sect; + unsigned char *data; + struct ultrix_disklabel { + s32 pt_magic; /* magic no. indicating part. info exits */ + s32 pt_valid; /* set by driver if pt is current */ + struct pt_info { + s32 pi_nblocks; /* no. of sectors */ + u32 pi_blkoff; /* block offset for start */ + } pt_part[8]; + } *label; + +#define PT_MAGIC 0x032957 /* Partition magic number */ +#define PT_VALID 1 /* Indicates if struct is valid */ + + data = read_dev_sector(bdev, (16384 - sizeof(*label))/512, §); + if (!data) + return -1; + + label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label)); + + if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) { + for (i=0; i<8; i++) + if (label->pt_part[i].pi_nblocks) + put_partition(state, i+1, + label->pt_part[i].pi_blkoff, + label->pt_part[i].pi_nblocks); + put_dev_sector(sect); + printk ("\n"); + return 1; + } else { + put_dev_sector(sect); + return 0; + } +} |