move fs/partitions to block/

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 275 insertions, 0 deletions

diff --git a/block/partitions/ibm.c b/block/partitions/ibm.c
new file mode 100644
index 000000000000..d513a07f44bb
--- /dev/null
+++ b/block/partitions/ibm.c
@@ -0,0 +1,275 @@
+/*
+ * 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
+ */
+
+#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 sector_t
+cchh2blk (struct vtoc_cchh *ptr, struct hd_geometry *geo) {
+
+	sector_t cyl;
+	__u16 head;
+
+	/*decode cylinder and heads for large volumes */
+	cyl = ptr->hh & 0xFFF0;
+	cyl <<= 12;
+	cyl |= ptr->cc;
+	head = ptr->hh & 0x000F;
+	return cyl * geo->heads * geo->sectors +
+	       head * geo->sectors;
+}
+
+/*
+ * compute the block number from a
+ * cyl-cyl-head-head-block structure
+ */
+static sector_t
+cchhb2blk (struct vtoc_cchhb *ptr, struct hd_geometry *geo) {
+
+	sector_t cyl;
+	__u16 head;
+
+	/*decode cylinder and heads for large volumes */
+	cyl = ptr->hh & 0xFFF0;
+	cyl <<= 12;
+	cyl |= ptr->cc;
+	head = ptr->hh & 0x000F;
+	return	cyl * geo->heads * geo->sectors +
+		head * geo->sectors +
+		ptr->b;
+}
+
+/*
+ */
+int ibm_partition(struct parsed_partitions *state)
+{
+	struct block_device *bdev = state->bdev;
+	int blocksize, res;
+	loff_t i_size, offset, size, fmt_size;
+	dasd_information2_t *info;
+	struct hd_geometry *geo;
+	char type[5] = {0,};
+	char name[7] = {0,};
+	union label_t {
+		struct vtoc_volume_label_cdl vol;
+		struct vtoc_volume_label_ldl lnx;
+		struct vtoc_cms_label cms;
+	} *label;
+	unsigned char *data;
+	Sector sect;
+	sector_t labelsect;
+	char tmp[64];
+
+	res = 0;
+	blocksize = bdev_logical_block_size(bdev);
+	if (blocksize <= 0)
+		goto out_exit;
+	i_size = i_size_read(bdev->bd_inode);
+	if (i_size == 0)
+		goto out_exit;
+
+	info = kmalloc(sizeof(dasd_information2_t), GFP_KERNEL);
+	if (info == NULL)
+		goto out_exit;
+	geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL);
+	if (geo == NULL)
+		goto out_nogeo;
+	label = kmalloc(sizeof(union label_t), GFP_KERNEL);
+	if (label == NULL)
+		goto out_nolab;
+
+	if (ioctl_by_bdev(bdev, BIODASDINFO2, (unsigned long)info) != 0 ||
+	    ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0)
+		goto out_freeall;
+
+	/*
+	 * Special case for FBA disks: label sector does not depend on
+	 * blocksize.
+	 */
+	if ((info->cu_type == 0x6310 && info->dev_type == 0x9336) ||
+	    (info->cu_type == 0x3880 && info->dev_type == 0x3370))
+		labelsect = info->label_block;
+	else
+		labelsect = info->label_block * (blocksize >> 9);
+
+	/*
+	 * Get volume label, extract name and type.
+	 */
+	data = read_part_sector(state, labelsect, &sect);
+	if (data == NULL)
+		goto out_readerr;
+
+	memcpy(label, data, sizeof(union label_t));
+	put_dev_sector(sect);
+
+	if ((!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) {
+		strncpy(type, label->vol.vollbl, 4);
+		strncpy(name, label->vol.volid, 6);
+	} else {
+		strncpy(type, label->lnx.vollbl, 4);
+		strncpy(name, label->lnx.volid, 6);
+	}
+	EBCASC(type, 4);
+	EBCASC(name, 6);
+
+	res = 1;
+
+	/*
+	 * Three different formats: LDL, CDL and unformated disk
+	 *
+	 * identified by info->format
+	 *
+	 * unformated disks we do not have to care about
+	 */
+	if (info->format == DASD_FORMAT_LDL) {
+		if (strncmp(type, "CMS1", 4) == 0) {
+			/*
+			 * VM style CMS1 labeled disk
+			 */
+			blocksize = label->cms.block_size;
+			if (label->cms.disk_offset != 0) {
+				snprintf(tmp, sizeof(tmp), "CMS1/%8s(MDSK):", name);
+				strlcat(state->pp_buf, tmp, PAGE_SIZE);
+				/* disk is reserved minidisk */
+				offset = label->cms.disk_offset;
+				size = (label->cms.block_count - 1)
+					* (blocksize >> 9);
+			} else {
+				snprintf(tmp, sizeof(tmp), "CMS1/%8s:", name);
+				strlcat(state->pp_buf, tmp, PAGE_SIZE);
+				offset = (info->label_block + 1);
+				size = label->cms.block_count
+					* (blocksize >> 9);
+			}
+			put_partition(state, 1, offset*(blocksize >> 9),
+				      size-offset*(blocksize >> 9));
+		} else {
+			if (strncmp(type, "LNX1", 4) == 0) {
+				snprintf(tmp, sizeof(tmp), "LNX1/%8s:", name);
+				strlcat(state->pp_buf, tmp, PAGE_SIZE);
+				if (label->lnx.ldl_version == 0xf2) {
+					fmt_size = label->lnx.formatted_blocks
+						* (blocksize >> 9);
+				} else if (!strcmp(info->type, "ECKD")) {
+					/* formated w/o large volume support */
+					fmt_size = geo->cylinders * geo->heads
+					      * geo->sectors * (blocksize >> 9);
+				} else {
+					/* old label and no usable disk geometry
+					 * (e.g. DIAG) */
+					fmt_size = i_size >> 9;
+				}
+				size = i_size >> 9;
+				if (fmt_size < size)
+					size = fmt_size;
+				offset = (info->label_block + 1);
+			} else {
+				/* unlabeled disk */
+				strlcat(state->pp_buf, "(nonl)", PAGE_SIZE);
+				size = i_size >> 9;
+				offset = (info->label_block + 1);
+			}
+			put_partition(state, 1, offset*(blocksize >> 9),
+				      size-offset*(blocksize >> 9));
+		}
+	} else if (info->format == DASD_FORMAT_CDL) {
+		/*
+		 * New style CDL formatted disk
+		 */
+		sector_t blk;
+		int counter;
+
+		/*
+		 * check if VOL1 label is available
+		 * if not, something is wrong, skipping partition detection
+		 */
+		if (strncmp(type, "VOL1",  4) == 0) {
+			snprintf(tmp, sizeof(tmp), "VOL1/%8s:", name);
+			strlcat(state->pp_buf, tmp, PAGE_SIZE);
+			/*
+			 * get block number and read then go through format1
+			 * labels
+			 */
+			blk = cchhb2blk(&label->vol.vtoc, geo) + 1;
+			counter = 0;
+			data = read_part_sector(state, blk * (blocksize/512),
+						&sect);
+			while (data != NULL) {
+				struct vtoc_format1_label f1;
+
+				memcpy(&f1, data,
+				       sizeof(struct vtoc_format1_label));
+				put_dev_sector(sect);
+
+				/* skip FMT4 / FMT5 / FMT7 labels */
+				if (f1.DS1FMTID == _ascebc['4']
+				    || f1.DS1FMTID == _ascebc['5']
+				    || f1.DS1FMTID == _ascebc['7']
+				    || f1.DS1FMTID == _ascebc['9']) {
+					blk++;
+					data = read_part_sector(state,
+						blk * (blocksize/512), &sect);
+					continue;
+				}
+
+				/* only FMT1 and 8 labels valid at this point */
+				if (f1.DS1FMTID != _ascebc['1'] &&
+				    f1.DS1FMTID != _ascebc['8'])
+					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++;
+				data = read_part_sector(state,
+						blk * (blocksize/512), &sect);
+			}
+
+			if (!data)
+				/* Are we not supposed to report this ? */
+				goto out_readerr;
+		} else
+			printk(KERN_WARNING "Warning, expected Label VOL1 not "
+			       "found, treating as CDL formated Disk");
+
+	}
+
+	strlcat(state->pp_buf, "\n", PAGE_SIZE);
+	goto out_freeall;
+
+
+out_readerr:
+	res = -1;
+out_freeall:
+	kfree(label);
+out_nolab:
+	kfree(geo);
+out_nogeo:
+	kfree(info);
+out_exit:
+	return res;
+}