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Message-ID: <20070406152351.GA26889@ingate.macqel.be>
Date: Fri, 6 Apr 2007 17:23:51 +0200
From: Philippe De Muyter <phdm@...qel.be>
To: linux-kernel@...r.kernel.org
Subject: [PATCH] partition : add support for sysv68 partitions
Hi all,
Add support for the Motorola sysv68 disk partition (slices in motorola doc).
Signed-off-by: Philippe De Muyter <phdm@...qel.be>
diff -ruN fs/partitionsbk/check.c fs/partitions/check.c
--- fs/partitionsbk/check.c 2006-09-20 05:42:06.000000000 +0200
+++ fs/partitions/check.c 2007-04-06 10:52:21.000000000 +0200
@@ -34,6 +34,7 @@
#include "ultrix.h"
#include "efi.h"
#include "karma.h"
+#include "sysv68.h"
#ifdef CONFIG_BLK_DEV_MD
extern void md_autodetect_dev(dev_t dev);
@@ -105,6 +106,9 @@
#ifdef CONFIG_KARMA_PARTITION
karma_partition,
#endif
+#ifdef CONFIG_SYSV68_PARTITION
+ sysv68_partition,
+#endif
NULL
};
diff -ruN fs/partitionsbk/Kconfig fs/partitions/Kconfig
--- fs/partitionsbk/Kconfig 2006-09-20 05:42:06.000000000 +0200
+++ fs/partitions/Kconfig 2007-04-04 15:14:57.000000000 +0200
@@ -237,3 +237,12 @@
Say Y here if you would like to use hard disks under Linux which
were partitioned using EFI GPT. Presently only useful on the
IA-64 platform.
+
+config SYSV68_PARTITION
+ bool "SYSV68 partition table support" if PARTITION_ADVANCED
+ default y if M68K
+ help
+ Say Y here if you would like to be able to read the hard disk
+ partition table format used by Motorola Delta machines (using
+ sysv68).
+ Otherwise, say N.
diff -ruN fs/partitionsbk/Makefile fs/partitions/Makefile
--- fs/partitionsbk/Makefile 2006-09-20 05:42:06.000000000 +0200
+++ fs/partitions/Makefile 2007-04-04 15:53:01.000000000 +0200
@@ -17,3 +17,4 @@
obj-$(CONFIG_IBM_PARTITION) += ibm.o
obj-$(CONFIG_EFI_PARTITION) += efi.o
obj-$(CONFIG_KARMA_PARTITION) += karma.o
+obj-$(CONFIG_SYSV68_PARTITION) += sysv68.o
diff -ruN fs/partitionsbk/sysv68.c fs/partitions/sysv68.c
--- fs/partitionsbk/sysv68.c 1970-01-01 01:00:00.000000000 +0100
+++ fs/partitions/sysv68.c 2007-04-06 16:34:33.000000000 +0200
@@ -0,0 +1,92 @@
+/*
+ * fs/partitions/sysv68.c
+ *
+ * Copyright (C) 2007 Philippe De Muyter <phdm@...qel.be>
+ */
+
+#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;
+}
diff -ruN fs/partitionsbk/sysv68.h fs/partitions/sysv68.h
--- fs/partitionsbk/sysv68.h 1970-01-01 01:00:00.000000000 +0100
+++ fs/partitions/sysv68.h 2007-04-06 16:30:22.000000000 +0200
@@ -0,0 +1 @@
+extern int sysv68_partition(struct parsed_partitions *state, struct block_device *bdev);
--
Philippe De Muyter phdm at macqel dot be Tel +32 27029044
Macq Electronique SA rue de l'Aeronef 2 B-1140 Bruxelles Fax +32 27029077
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