Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 191 insertions, 0 deletions

diff --git a/fs/partitions/ibm.c b/fs/partitions/ibm.c
new file mode 100644
index 0000000..d59dcbf
--- /dev/null
+++ b/fs/partitions/ibm.c
@@ -0,0 +1,191 @@
+/*
+ * File...........: linux/fs/partitions/ibm.c      
+ * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ *                  Volker Sameske <sameske@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
+
+ * History of changes (starts July 2000)
+ * 07/10/00 Fixed detection of CMS formatted disks     
+ * 02/13/00 VTOC partition support added
+ * 12/27/01 fixed PL030593 (CMS reserved minidisk not detected on 64 bit)
+ * 07/24/03 no longer using contents of freed page for CMS label recognition (BZ3611)
+ */
+
+#include <linux/config.h>
+#include <linux/buffer_head.h>
+#include <linux/hdreg.h>
+#include <linux/slab.h>
+#include <asm/dasd.h>
+#include <asm/ebcdic.h>
+#include <asm/uaccess.h>
+#include <asm/vtoc.h>
+
+#include "check.h"
+#include "ibm.h"
+
+/*
+ * compute the block number from a 
+ * cyl-cyl-head-head structure
+ */
+static inline int
+cchh2blk (cchh_t *ptr, struct hd_geometry *geo) {
+        return ptr->cc * geo->heads * geo->sectors +
+	       ptr->hh * geo->sectors;
+}
+
+
+/*
+ * compute the block number from a 
+ * cyl-cyl-head-head-block structure
+ */
+static inline int
+cchhb2blk (cchhb_t *ptr, struct hd_geometry *geo) {
+        return ptr->cc * geo->heads * geo->sectors +
+		ptr->hh * geo->sectors +
+		ptr->b;
+}
+
+/*
+ */
+int 
+ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
+{
+	int blocksize, offset, size;
+	dasd_information_t *info;
+	struct hd_geometry *geo;
+	char type[5] = {0,};
+	char name[7] = {0,};
+	volume_label_t *vlabel;
+	unsigned char *data;
+	Sector sect;
+
+	if ((info = kmalloc(sizeof(dasd_information_t), GFP_KERNEL)) == NULL)
+		goto out_noinfo;
+	if ((geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL)) == NULL)
+		goto out_nogeo;
+	if ((vlabel = kmalloc(sizeof(volume_label_t), GFP_KERNEL)) == NULL)
+		goto out_novlab;
+	
+	if (ioctl_by_bdev(bdev, BIODASDINFO, (unsigned long)info) != 0 ||
+	    ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0)
+		goto out_noioctl;
+	
+	if ((blocksize = bdev_hardsect_size(bdev)) <= 0)
+		goto out_badsect;
+
+	/*
+	 * Get volume label, extract name and type.
+	 */
+	data = read_dev_sector(bdev, info->label_block*(blocksize/512), &sect);
+	if (data == NULL)
+		goto out_readerr;
+
+	strncpy (type, data, 4);
+	if ((!info->FBA_layout) && (!strcmp(info->type, "ECKD")))
+		strncpy(name, data + 8, 6);
+	else
+		strncpy(name, data + 4, 6);
+	memcpy (vlabel, data, sizeof(volume_label_t));
+	put_dev_sector(sect);
+
+	EBCASC(type, 4);
+	EBCASC(name, 6);
+
+	/*
+	 * Three different types: CMS1, VOL1 and LNX1/unlabeled
+	 */
+	if (strncmp(type, "CMS1", 4) == 0) {
+		/*
+		 * VM style CMS1 labeled disk
+		 */
+		int *label = (int *) vlabel;
+
+		if (label[13] != 0) {
+			printk("CMS1/%8s(MDSK):", name);
+			/* disk is reserved minidisk */
+			blocksize = label[3];
+			offset = label[13];
+			size = (label[7] - 1)*(blocksize >> 9);
+		} else {
+			printk("CMS1/%8s:", name);
+			offset = (info->label_block + 1);
+			size = bdev->bd_inode->i_size >> 9;
+		}
+		put_partition(state, 1, offset*(blocksize >> 9),
+				 size-offset*(blocksize >> 9));
+	} else if ((strncmp(type, "VOL1", 4) == 0) &&
+		(!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) {
+		/*
+		 * New style VOL1 labeled disk
+		 */
+		unsigned int blk;
+		int counter;
+
+		printk("VOL1/%8s:", name);
+
+		/* get block number and read then go through format1 labels */
+		blk = cchhb2blk(&vlabel->vtoc, geo) + 1;
+		counter = 0;
+		while ((data = read_dev_sector(bdev, blk*(blocksize/512),
+					       &sect)) != NULL) {
+			format1_label_t f1;
+
+			memcpy(&f1, data, sizeof(format1_label_t));
+			put_dev_sector(sect);
+
+			/* skip FMT4 / FMT5 / FMT7 labels */
+			if (f1.DS1FMTID == _ascebc['4']
+			    || f1.DS1FMTID == _ascebc['5']
+			    || f1.DS1FMTID == _ascebc['7']) {
+			        blk++;
+				continue;
+			}
+
+			/* only FMT1 valid at this point */
+			if (f1.DS1FMTID != _ascebc['1'])
+				break;
+
+			/* OK, we got valid partition data */
+		        offset = cchh2blk(&f1.DS1EXT1.llimit, geo);
+			size  = cchh2blk(&f1.DS1EXT1.ulimit, geo) - 
+				offset + geo->sectors;
+			if (counter >= state->limit)
+				break;
+			put_partition(state, counter + 1, 
+					 offset * (blocksize >> 9),
+					 size * (blocksize >> 9));
+			counter++;
+			blk++;
+		}
+	} else {
+		/*
+		 * Old style LNX1 or unlabeled disk
+		 */
+		if (strncmp(type, "LNX1", 4) == 0)
+			printk ("LNX1/%8s:", name);
+		else
+			printk("(nonl)/%8s:", name);
+		offset = (info->label_block + 1);
+		size = (bdev->bd_inode->i_size >> 9);
+		put_partition(state, 1, offset*(blocksize >> 9),
+				 size-offset*(blocksize >> 9));
+	}
+
+	printk("\n");
+	kfree(vlabel);
+	kfree(geo);
+	kfree(info);
+	return 1;
+	
+out_readerr:
+out_badsect:
+out_noioctl:
+	kfree(vlabel);
+out_novlab:
+	kfree(geo);
+out_nogeo:
+	kfree(info);
+out_noinfo:
+	return 0;
+}