From 19d0e8ce856a7628a630710aed82931ce1c7eb97 Mon Sep 17 00:00:00 2001 From: Philippe De Muyter Date: Tue, 8 May 2007 00:29:15 -0700 Subject: partition: add support for sysv68 partitions Add support for the Motorola sysv68 disk partition (slices in motorola doc). Signed-off-by: Philippe De Muyter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/partitions/sysv68.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 fs/partitions/sysv68.c (limited to 'fs/partitions/sysv68.c') diff --git a/fs/partitions/sysv68.c b/fs/partitions/sysv68.c new file mode 100644 index 000000000000..4eba27b78643 --- /dev/null +++ b/fs/partitions/sysv68.c @@ -0,0 +1,92 @@ +/* + * fs/partitions/sysv68.c + * + * Copyright (C) 2007 Philippe De Muyter + */ + +#include "check.h" +#include "sysv68.h" + +/* + * Volume ID structure: on first 256-bytes sector of disk + */ + +struct volumeid { + u8 vid_unused[248]; + u8 vid_mac[8]; /* ASCII string "MOTOROLA" */ +}; + +/* + * config block: second 256-bytes sector on disk + */ + +struct dkconfig { + u8 ios_unused0[128]; + __be32 ios_slcblk; /* Slice table block number */ + __be16 ios_slccnt; /* Number of entries in slice table */ + u8 ios_unused1[122]; +}; + +/* + * combined volumeid and dkconfig block + */ + +struct dkblk0 { + struct volumeid dk_vid; + struct dkconfig dk_ios; +}; + +/* + * Slice Table Structure + */ + +struct slice { + __be32 nblocks; /* slice size (in blocks) */ + __be32 blkoff; /* block offset of slice */ +}; + + +int sysv68_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + int i, slices; + int slot = 1; + Sector sect; + unsigned char *data; + struct dkblk0 *b; + struct slice *slice; + + data = read_dev_sector(bdev, 0, §); + if (!data) + return -1; + + b = (struct dkblk0 *)data; + if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) { + put_dev_sector(sect); + return 0; + } + slices = be16_to_cpu(b->dk_ios.ios_slccnt); + i = be32_to_cpu(b->dk_ios.ios_slcblk); + put_dev_sector(sect); + + data = read_dev_sector(bdev, i, §); + if (!data) + return -1; + + slices -= 1; /* last slice is the whole disk */ + printk("sysV68: %s(s%u)", state->name, slices); + slice = (struct slice *)data; + for (i = 0; i < slices; i++, slice++) { + if (slot == state->limit) + break; + if (be32_to_cpu(slice->nblocks)) { + put_partition(state, slot, + be32_to_cpu(slice->blkoff), + be32_to_cpu(slice->nblocks)); + printk("(s%u)", i); + } + slot++; + } + printk("\n"); + put_dev_sector(sect); + return 1; +} -- cgit v1.2.3