Linux-2.6.12-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!
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), §);
+ 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),
+ §)) != 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;
+}