[linux-block.git] / block / partitions / ibm.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
 *                  Volker Sameske <sameske@de.ibm.com>
 * Bugreports.to..: <Linux390@de.ibm.com>
 * Copyright IBM Corp. 1999, 2012
 */

#include <linux/buffer_head.h>
#include <linux/hdreg.h>
#include <linux/slab.h>
#include <asm/dasd.h>
#include <asm/ebcdic.h>
#include <linux/uaccess.h>
#include <asm/vtoc.h>
#include <linux/module.h>
#include <linux/dasd_mod.h>

#include "check.h"

union label_t {
	struct vtoc_volume_label_cdl vol;
	struct vtoc_volume_label_ldl lnx;
	struct vtoc_cms_label cms;
};

/*
 * 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;
}

static int find_label(struct parsed_partitions *state,
		      dasd_information2_t *info,
		      struct hd_geometry *geo,
		      int blocksize,
		      sector_t *labelsect,
		      char name[],
		      char type[],
		      union label_t *label)
{
	Sector sect;
	unsigned char *data;
	sector_t testsect[3];
	unsigned char temp[5];
	int found = 0;
	int i, testcount;

	/* There a three places where we may find a valid label:
	 * - on an ECKD disk it's block 2
	 * - on an FBA disk it's block 1
	 * - on an CMS formatted FBA disk it is sector 1, even if the block size
	 *   is larger than 512 bytes (possible if the DIAG discipline is used)
	 * If we have a valid info structure, then we know exactly which case we
	 * have, otherwise we just search through all possebilities.
	 */
	if (info) {
		if ((info->cu_type == 0x6310 && info->dev_type == 0x9336) ||
		    (info->cu_type == 0x3880 && info->dev_type == 0x3370))
			testsect[0] = info->label_block;
		else
			testsect[0] = info->label_block * (blocksize >> 9);
		testcount = 1;
	} else {
		testsect[0] = 1;
		testsect[1] = (blocksize >> 9);
		testsect[2] = 2 * (blocksize >> 9);
		testcount = 3;
	}
	for (i = 0; i < testcount; ++i) {
		data = read_part_sector(state, testsect[i], &sect);
		if (data == NULL)
			continue;
		memcpy(label, data, sizeof(*label));
		memcpy(temp, data, 4);
		temp[4] = 0;
		EBCASC(temp, 4);
		put_dev_sector(sect);
		if (!strcmp(temp, "VOL1") ||
		    !strcmp(temp, "LNX1") ||
		    !strcmp(temp, "CMS1")) {
			if (!strcmp(temp, "VOL1")) {
				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);
			*labelsect = testsect[i];
			found = 1;
			break;
		}
	}
	if (!found)
		memset(label, 0, sizeof(*label));

	return found;
}

static int find_vol1_partitions(struct parsed_partitions *state,
				struct hd_geometry *geo,
				int blocksize,
				char name[],
				union label_t *label)
{
	sector_t blk;
	int counter;
	char tmp[64];
	Sector sect;
	unsigned char *data;
	loff_t offset, size;
	struct vtoc_format1_label f1;
	int secperblk;

	snprintf(tmp, sizeof(tmp), "VOL1/%8s:", name);
	strlcat(state->pp_buf, tmp, PAGE_SIZE);
	/*
	 * get start of VTOC from the disk label and then search for format1
	 * and format8 labels
	 */
	secperblk = blocksize >> 9;
	blk = cchhb2blk(&label->vol.vtoc, geo) + 1;
	counter = 0;
	data = read_part_sector(state, blk * secperblk, &sect);
	while (data != NULL) {
		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 * secperblk, &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;
		offset *= secperblk;
		size *= secperblk;
		if (counter >= state->limit)
			break;
		put_partition(state, counter + 1, offset, size);
		counter++;
		blk++;
		data = read_part_sector(state, blk * secperblk, &sect);
	}
	strlcat(state->pp_buf, "\n", PAGE_SIZE);

	if (!data)
		return -1;

	return 1;
}

static int find_lnx1_partitions(struct parsed_partitions *state,
				struct hd_geometry *geo,
				int blocksize,
				char name[],
				union label_t *label,
				sector_t labelsect,
				sector_t nr_sectors,
				dasd_information2_t *info)
{
	loff_t offset, geo_size, size;
	char tmp[64];
	int secperblk;

	snprintf(tmp, sizeof(tmp), "LNX1/%8s:", name);
	strlcat(state->pp_buf, tmp, PAGE_SIZE);
	secperblk = blocksize >> 9;
	if (label->lnx.ldl_version == 0xf2) {
		size = label->lnx.formatted_blocks * secperblk;
	} else {
		/*
		 * Formated w/o large volume support. If the sanity check
		 * 'size based on geo == size based on nr_sectors' is true, then
		 * we can safely assume that we know the formatted size of
		 * the disk, otherwise we need additional information
		 * that we can only get from a real DASD device.
		 */
		geo_size = geo->cylinders * geo->heads
			* geo->sectors * secperblk;
		size = nr_sectors;
		if (size != geo_size) {
			if (!info) {
				strlcat(state->pp_buf, "\n", PAGE_SIZE);
				return 1;
			}
			if (!strcmp(info->type, "ECKD"))
				if (geo_size < size)
					size = geo_size;
			/* else keep size based on nr_sectors */
		}
	}
	/* first and only partition starts in the first block after the label */
	offset = labelsect + secperblk;
	put_partition(state, 1, offset, size - offset);
	strlcat(state->pp_buf, "\n", PAGE_SIZE);
	return 1;
}

static int find_cms1_partitions(struct parsed_partitions *state,
				struct hd_geometry *geo,
				int blocksize,
				char name[],
				union label_t *label,
				sector_t labelsect)
{
	loff_t offset, size;
	char tmp[64];
	int secperblk;

	/*
	 * VM style CMS1 labeled disk
	 */
	blocksize = label->cms.block_size;
	secperblk = blocksize >> 9;
	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 * secperblk;
		size = (label->cms.block_count - 1) * secperblk;
	} else {
		snprintf(tmp, sizeof(tmp), "CMS1/%8s:", name);
		strlcat(state->pp_buf, tmp, PAGE_SIZE);
		/*
		 * Special case for FBA devices:
		 * If an FBA device is CMS formatted with blocksize > 512 byte
		 * and the DIAG discipline is used, then the CMS label is found
		 * in sector 1 instead of block 1. However, the partition is
		 * still supposed to start in block 2.
		 */
		if (labelsect == 1)
			offset = 2 * secperblk;
		else
			offset = labelsect + secperblk;
		size = label->cms.block_count * secperblk;
	}

	put_partition(state, 1, offset, size-offset);
	strlcat(state->pp_buf, "\n", PAGE_SIZE);
	return 1;
}


/*
 * This is the main function, called by check.c
 */
int ibm_partition(struct parsed_partitions *state)
{
	int (*fn)(struct gendisk *disk, dasd_information2_t *info);
	struct gendisk *disk = state->disk;
	struct block_device *bdev = disk->part0;
	int blocksize, res;
	loff_t offset, size;
	sector_t nr_sectors;
	dasd_information2_t *info;
	struct hd_geometry *geo;
	char type[5] = {0,};
	char name[7] = {0,};
	sector_t labelsect;
	union label_t *label;

	res = 0;
	if (!disk->fops->getgeo)
		goto out_exit;
	fn = symbol_get(dasd_biodasdinfo);
	blocksize = bdev_logical_block_size(bdev);
	if (blocksize <= 0)
		goto out_symbol;
	nr_sectors = bdev_nr_sectors(bdev);
	if (nr_sectors == 0)
		goto out_symbol;
	info = kmalloc(sizeof(dasd_information2_t), GFP_KERNEL);
	if (info == NULL)
		goto out_symbol;
	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;
	/* set start if not filled by getgeo function e.g. virtblk */
	geo->start = get_start_sect(bdev);
	if (disk->fops->getgeo(bdev, geo))
		goto out_freeall;
	if (!fn || fn(disk, info)) {
		kfree(info);
		info = NULL;
	}

	if (find_label(state, info, geo, blocksize, &labelsect, name, type,
		       label)) {
		if (!strncmp(type, "VOL1", 4)) {
			res = find_vol1_partitions(state, geo, blocksize, name,
						   label);
		} else if (!strncmp(type, "LNX1", 4)) {
			res = find_lnx1_partitions(state, geo, blocksize, name,
						   label, labelsect, nr_sectors,
						   info);
		} else if (!strncmp(type, "CMS1", 4)) {
			res = find_cms1_partitions(state, geo, blocksize, name,
						   label, labelsect);
		}
	} else if (info) {
		/*
		 * ugly but needed for backward compatibility:
		 * If the block device is a DASD (i.e. BIODASDINFO2 works),
		 * then we claim it in any case, even though it has no valid
		 * label. If it has the LDL format, then we simply define a
		 * partition as if it had an LNX1 label.
		 */
		res = 1;
		if (info->format == DASD_FORMAT_LDL) {
			strlcat(state->pp_buf, "(nonl)", PAGE_SIZE);
			size = nr_sectors;
			offset = (info->label_block + 1) * (blocksize >> 9);
			put_partition(state, 1, offset, size-offset);
			strlcat(state->pp_buf, "\n", PAGE_SIZE);
		}
	} else
		res = 0;

out_freeall:
	kfree(label);
out_nolab:
	kfree(geo);
out_nogeo:
	kfree(info);
out_symbol:
	if (fn)
		symbol_put(dasd_biodasdinfo);
out_exit:
	return res;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4	2	/*
1da177e4 LT	3	* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
	4	* Volker Sameske <sameske@de.ibm.com>
	5	* Bugreports.to..: <Linux390@de.ibm.com>
46e88947	6	* Copyright IBM Corp. 1999, 2012
1da177e4 LT	7	*/
1da177e4 LT	8
1da177e4 LT	9	#include <linux/buffer_head.h>
	10	#include <linux/hdreg.h>
	11	#include <linux/slab.h>
	12	#include <asm/dasd.h>
	13	#include <asm/ebcdic.h>
7c0f6ba6	14	#include <linux/uaccess.h>
1da177e4	15	#include <asm/vtoc.h>
26d7e28e SH	16	#include <linux/module.h>
26d7e28e SH	17	#include <linux/dasd_mod.h>
1da177e4 LT	18
1da177e4 LT	19	#include "check.h"
1da177e4	20
46e88947 SW	21	union label_t {
	22	struct vtoc_volume_label_cdl vol;
	23	struct vtoc_volume_label_ldl lnx;
	24	struct vtoc_cms_label cms;
	25	};
	26
1da177e4	27	/*
ef1597d5	28	* compute the block number from a
1da177e4 LT	29	* cyl-cyl-head-head structure
1da177e4 LT	30	*/
46e88947 SW	31	static sector_t cchh2blk(struct vtoc_cchh ptr, struct hd_geometry geo)
46e88947 SW	32	{
b44b0ab3 SW	33	sector_t cyl;
	34	__u16 head;
	35
46e88947	36	/* decode cylinder and heads for large volumes */
b44b0ab3 SW	37	cyl = ptr->hh & 0xFFF0;
	38	cyl <<= 12;
	39	cyl \|= ptr->cc;
	40	head = ptr->hh & 0x000F;
	41	return cyl * geo->heads * geo->sectors +
	42	head * geo->sectors;
1da177e4 LT	43	}
1da177e4 LT	44
1da177e4	45	/*
ef1597d5	46	* compute the block number from a
1da177e4 LT	47	* cyl-cyl-head-head-block structure
1da177e4 LT	48	*/
46e88947 SW	49	static sector_t cchhb2blk(struct vtoc_cchhb ptr, struct hd_geometry geo)
46e88947 SW	50	{
b44b0ab3 SW	51	sector_t cyl;
	52	__u16 head;
	53
46e88947	54	/* decode cylinder and heads for large volumes */
b44b0ab3 SW	55	cyl = ptr->hh & 0xFFF0;
	56	cyl <<= 12;
	57	cyl \|= ptr->cc;
	58	head = ptr->hh & 0x000F;
	59	return cyl * geo->heads * geo->sectors +
	60	head * geo->sectors +
1da177e4 LT	61	ptr->b;
	62	}
	63
46e88947 SW	64	static int find_label(struct parsed_partitions *state,
	65	dasd_information2_t *info,
	66	struct hd_geometry *geo,
	67	int blocksize,
	68	sector_t *labelsect,
	69	char name[],
	70	char type[],
	71	union label_t *label)
	72	{
	73	Sector sect;
	74	unsigned char *data;
	75	sector_t testsect[3];
	76	unsigned char temp[5];
	77	int found = 0;
	78	int i, testcount;
	79
	80	/* There a three places where we may find a valid label:
	81	* - on an ECKD disk it's block 2
	82	* - on an FBA disk it's block 1
	83	* - on an CMS formatted FBA disk it is sector 1, even if the block size
	84	* is larger than 512 bytes (possible if the DIAG discipline is used)
	85	* If we have a valid info structure, then we know exactly which case we
	86	* have, otherwise we just search through all possebilities.
	87	*/
	88	if (info) {
	89	if ((info->cu_type == 0x6310 && info->dev_type == 0x9336) \|\|
	90	(info->cu_type == 0x3880 && info->dev_type == 0x3370))
	91	testsect[0] = info->label_block;
	92	else
	93	testsect[0] = info->label_block * (blocksize >> 9);
	94	testcount = 1;
	95	} else {
	96	testsect[0] = 1;
	97	testsect[1] = (blocksize >> 9);
	98	testsect[2] = 2 * (blocksize >> 9);
	99	testcount = 3;
	100	}
	101	for (i = 0; i < testcount; ++i) {
	102	data = read_part_sector(state, testsect[i], &sect);
	103	if (data == NULL)
	104	continue;
	105	memcpy(label, data, sizeof(*label));
	106	memcpy(temp, data, 4);
	107	temp[4] = 0;
	108	EBCASC(temp, 4);
	109	put_dev_sector(sect);
	110	if (!strcmp(temp, "VOL1") \|\|
	111	!strcmp(temp, "LNX1") \|\|
	112	!strcmp(temp, "CMS1")) {
	113	if (!strcmp(temp, "VOL1")) {
	114	strncpy(type, label->vol.vollbl, 4);
	115	strncpy(name, label->vol.volid, 6);
	116	} else {
	117	strncpy(type, label->lnx.vollbl, 4);
	118	strncpy(name, label->lnx.volid, 6);
	119	}
	120	EBCASC(type, 4);
	121	EBCASC(name, 6);
	122	*labelsect = testsect[i];
	123	found = 1;
	124	break;
	125	}
	126	}
	127	if (!found)
128	memset(label, 0, sizeof(*label));
129
130	return found;
131	}
132
133	static int find_vol1_partitions(struct parsed_partitions *state,
134	struct hd_geometry *geo,
135	int blocksize,
136	char name[],
137	union label_t *label)
138	{
139	sector_t blk;
140	int counter;
141	char tmp[64];
142	Sector sect;
143	unsigned char *data;
144	loff_t offset, size;
145	struct vtoc_format1_label f1;
146	int secperblk;
147
148	snprintf(tmp, sizeof(tmp), "VOL1/%8s:", name);
149	strlcat(state->pp_buf, tmp, PAGE_SIZE);
150	/*
151	* get start of VTOC from the disk label and then search for format1
152	* and format8 labels
153	*/
154	secperblk = blocksize >> 9;
155	blk = cchhb2blk(&label->vol.vtoc, geo) + 1;
156	counter = 0;
157	data = read_part_sector(state, blk * secperblk, &sect);
158	while (data != NULL) {
159	memcpy(&f1, data, sizeof(struct vtoc_format1_label));
160	put_dev_sector(sect);
161	/* skip FMT4 / FMT5 / FMT7 labels */
162	if (f1.DS1FMTID == _ascebc['4']
163	\|\| f1.DS1FMTID == _ascebc['5']
164	\|\| f1.DS1FMTID == _ascebc['7']
165	\|\| f1.DS1FMTID == _ascebc['9']) {
166	blk++;
167	data = read_part_sector(state, blk * secperblk, &sect);
168	continue;
169	}
170	/* only FMT1 and 8 labels valid at this point */
171	if (f1.DS1FMTID != _ascebc['1'] &&
172	f1.DS1FMTID != _ascebc['8'])
173	break;
174	/* OK, we got valid partition data */
175	offset = cchh2blk(&f1.DS1EXT1.llimit, geo);
176	size = cchh2blk(&f1.DS1EXT1.ulimit, geo) -
177	offset + geo->sectors;
178	offset *= secperblk;
179	size *= secperblk;
180	if (counter >= state->limit)
181	break;
182	put_partition(state, counter + 1, offset, size);
183	counter++;
184	blk++;
185	data = read_part_sector(state, blk * secperblk, &sect);
186	}
187	strlcat(state->pp_buf, "\n", PAGE_SIZE);
188
189	if (!data)
190	return -1;
191
192	return 1;
193	}
194
195	static int find_lnx1_partitions(struct parsed_partitions *state,
196	struct hd_geometry *geo,
197	int blocksize,
198	char name[],
199	union label_t *label,
200	sector_t labelsect,
97eeb5fc	201	sector_t nr_sectors,
46e88947 SW	202	dasd_information2_t *info)
	203	{
	204	loff_t offset, geo_size, size;
	205	char tmp[64];
	206	int secperblk;
	207
	208	snprintf(tmp, sizeof(tmp), "LNX1/%8s:", name);
	209	strlcat(state->pp_buf, tmp, PAGE_SIZE);
	210	secperblk = blocksize >> 9;
	211	if (label->lnx.ldl_version == 0xf2) {
	212	size = label->lnx.formatted_blocks * secperblk;
	213	} else {
	214	/*
	215	* Formated w/o large volume support. If the sanity check
97eeb5fc	216	* 'size based on geo == size based on nr_sectors' is true, then
46e88947 SW	217	* we can safely assume that we know the formatted size of
	218	* the disk, otherwise we need additional information
	219	* that we can only get from a real DASD device.
	220	*/
	221	geo_size = geo->cylinders * geo->heads
	222	* geo->sectors * secperblk;
97eeb5fc	223	size = nr_sectors;
46e88947 SW	224	if (size != geo_size) {
	225	if (!info) {
	226	strlcat(state->pp_buf, "\n", PAGE_SIZE);
	227	return 1;
	228	}
	229	if (!strcmp(info->type, "ECKD"))
	230	if (geo_size < size)
	231	size = geo_size;
97eeb5fc	232	/* else keep size based on nr_sectors */
46e88947 SW	233	}
	234	}
	235	/* first and only partition starts in the first block after the label */
	236	offset = labelsect + secperblk;
	237	put_partition(state, 1, offset, size - offset);
	238	strlcat(state->pp_buf, "\n", PAGE_SIZE);
	239	return 1;
	240	}
	241
	242	static int find_cms1_partitions(struct parsed_partitions *state,
	243	struct hd_geometry *geo,
	244	int blocksize,
	245	char name[],
	246	union label_t *label,
	247	sector_t labelsect)
	248	{
	249	loff_t offset, size;
	250	char tmp[64];
	251	int secperblk;
	252
	253	/*
	254	* VM style CMS1 labeled disk
	255	*/
	256	blocksize = label->cms.block_size;
	257	secperblk = blocksize >> 9;
	258	if (label->cms.disk_offset != 0) {
	259	snprintf(tmp, sizeof(tmp), "CMS1/%8s(MDSK):", name);
	260	strlcat(state->pp_buf, tmp, PAGE_SIZE);
	261	/* disk is reserved minidisk */
	262	offset = label->cms.disk_offset * secperblk;
	263	size = (label->cms.block_count - 1) * secperblk;
	264	} else {
	265	snprintf(tmp, sizeof(tmp), "CMS1/%8s:", name);
	266	strlcat(state->pp_buf, tmp, PAGE_SIZE);
	267	/*
	268	* Special case for FBA devices:
	269	* If an FBA device is CMS formatted with blocksize > 512 byte
	270	* and the DIAG discipline is used, then the CMS label is found
	271	* in sector 1 instead of block 1. However, the partition is
	272	* still supposed to start in block 2.
	273	*/
	274	if (labelsect == 1)
	275	offset = 2 * secperblk;
	276	else
	277	offset = labelsect + secperblk;
	278	size = label->cms.block_count * secperblk;
	279	}
	280
	281	put_partition(state, 1, offset, size-offset);
	282	strlcat(state->pp_buf, "\n", PAGE_SIZE);
	283	return 1;
	284	}
	285
	286
1da177e4	287	/*
46e88947	288	* This is the main function, called by check.c
1da177e4	289	*/
1493bf21	290	int ibm_partition(struct parsed_partitions *state)
1da177e4	291	{
26d7e28e	292	int (fn)(struct gendisk disk, dasd_information2_t *info);
a08aa9bc CH	293	struct gendisk *disk = state->disk;
a08aa9bc CH	294	struct block_device *bdev = disk->part0;
b44b0ab3	295	int blocksize, res;
97eeb5fc CH	296	loff_t offset, size;
97eeb5fc CH	297	sector_t nr_sectors;
bf1a95a2	298	dasd_information2_t *info;
1da177e4 LT	299	struct hd_geometry *geo;
	300	char type[5] = {0,};
	301	char name[7] = {0,};
cffab6bc	302	sector_t labelsect;
46e88947	303	union label_t *label;
1da177e4	304
57881dd9	305	res = 0;
26d7e28e SH	306	if (!disk->fops->getgeo)
	307	goto out_exit;
	308	fn = symbol_get(dasd_biodasdinfo);
e1defc4f	309	blocksize = bdev_logical_block_size(bdev);
90f0094d	310	if (blocksize <= 0)
26d7e28e	311	goto out_symbol;
97eeb5fc CH	312	nr_sectors = bdev_nr_sectors(bdev);
97eeb5fc CH	313	if (nr_sectors == 0)
26d7e28e	314	goto out_symbol;
bf1a95a2 SH	315	info = kmalloc(sizeof(dasd_information2_t), GFP_KERNEL);
bf1a95a2 SH	316	if (info == NULL)
26d7e28e	317	goto out_symbol;
bf1a95a2 SH	318	geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL);
bf1a95a2 SH	319	if (geo == NULL)
1da177e4	320	goto out_nogeo;
bf1a95a2 SH	321	label = kmalloc(sizeof(union label_t), GFP_KERNEL);
bf1a95a2 SH	322	if (label == NULL)
56dc6a88	323	goto out_nolab;
26d7e28e SH	324	/* set start if not filled by getgeo function e.g. virtblk */
	325	geo->start = get_start_sect(bdev);
	326	if (disk->fops->getgeo(bdev, geo))
57881dd9	327	goto out_freeall;
7370997d	328	if (!fn \|\| fn(disk, info)) {
46e88947 SW	329	kfree(info);
46e88947 SW	330	info = NULL;
b44b0ab3	331	}
57881dd9	332
46e88947 SW	333	if (find_label(state, info, geo, blocksize, &labelsect, name, type,
	334	label)) {
	335	if (!strncmp(type, "VOL1", 4)) {
	336	res = find_vol1_partitions(state, geo, blocksize, name,
	337	label);
	338	} else if (!strncmp(type, "LNX1", 4)) {
	339	res = find_lnx1_partitions(state, geo, blocksize, name,
97eeb5fc	340	label, labelsect, nr_sectors,
46e88947 SW	341	info);
	342	} else if (!strncmp(type, "CMS1", 4)) {
	343	res = find_cms1_partitions(state, geo, blocksize, name,
	344	label, labelsect);
b44b0ab3	345	}
46e88947	346	} else if (info) {
1da177e4	347	/*
46e88947 SW	348	* ugly but needed for backward compatibility:
	349	* If the block device is a DASD (i.e. BIODASDINFO2 works),
	350	* then we claim it in any case, even though it has no valid
	351	* label. If it has the LDL format, then we simply define a
	352	* partition as if it had an LNX1 label.
1da177e4	353	*/
46e88947 SW	354	res = 1;
	355	if (info->format == DASD_FORMAT_LDL) {
	356	strlcat(state->pp_buf, "(nonl)", PAGE_SIZE);
97eeb5fc	357	size = nr_sectors;
46e88947 SW	358	offset = (info->label_block + 1) * (blocksize >> 9);
	359	put_partition(state, 1, offset, size-offset);
	360	strlcat(state->pp_buf, "\n", PAGE_SIZE);
	361	}
	362	} else
	363	res = 0;
ef1597d5	364
57881dd9	365	out_freeall:
56dc6a88 PO	366	kfree(label);
56dc6a88 PO	367	out_nolab:
1da177e4 LT	368	kfree(geo);
	369	out_nogeo:
	370	kfree(info);
26d7e28e	371	out_symbol:
7370997d CH	372	if (fn)
7370997d CH	373	symbol_put(dasd_biodasdinfo);
57881dd9 S	374	out_exit:
57881dd9 S	375	return res;
1da177e4	376	}