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112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
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* Copyright (C) 2015 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "lib/misc/lib.h"
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#include "lib/metadata/metadata.h"
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#include "lib/device/dev-type.h"
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#include <sys/ioctl.h>
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#ifdef __linux__
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/*
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* Interface taken from kernel header arch/s390/include/uapi/asm/dasd.h
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*/
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/*
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* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
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* Copyright IBM Corp. 1999, 2000
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* EMC Symmetrix ioctl Copyright EMC Corporation, 2008
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* Author.........: Nigel Hislop <hislop_nigel@emc.com>
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*/
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#define DASD_IOCTL_LETTER 'D'
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#define DASD_API_VERSION 6
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/*
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* struct dasd_information2_t
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* represents any data about the device, which is visible to userspace.
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* including foramt and featueres.
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*/
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typedef struct dasd_information2_t {
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unsigned int devno; /* S/390 devno */
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unsigned int real_devno; /* for aliases */
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unsigned int schid; /* S/390 subchannel identifier */
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unsigned int cu_type : 16; /* from SenseID */
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unsigned int cu_model : 8; /* from SenseID */
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unsigned int dev_type : 16; /* from SenseID */
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unsigned int dev_model : 8; /* from SenseID */
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unsigned int open_count;
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unsigned int req_queue_len;
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unsigned int chanq_len; /* length of chanq */
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char type[4]; /* from discipline.name, 'none' for unknown */
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unsigned int status; /* current device level */
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unsigned int label_block; /* where to find the VOLSER */
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unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
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unsigned int characteristics_size;
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unsigned int confdata_size;
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char characteristics[64]; /* from read_device_characteristics */
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char configuration_data[256]; /* from read_configuration_data */
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unsigned int format; /* format info like formatted/cdl/ldl/... */
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unsigned int features; /* dasd features like 'ro',... */
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unsigned int reserved0; /* reserved for further use ,... */
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unsigned int reserved1; /* reserved for further use ,... */
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unsigned int reserved2; /* reserved for further use ,... */
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unsigned int reserved3; /* reserved for further use ,... */
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unsigned int reserved4; /* reserved for further use ,... */
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unsigned int reserved5; /* reserved for further use ,... */
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unsigned int reserved6; /* reserved for further use ,... */
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unsigned int reserved7; /* reserved for further use ,... */
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} dasd_information2_t;
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#define DASD_FORMAT_CDL 2
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/* Get information on a dasd device (enhanced) */
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#define BIODASDINFO2 _IOR(DASD_IOCTL_LETTER,3,dasd_information2_t)
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/*
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* End of included interface.
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*/
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int dasd_is_cdl_formatted(struct device *dev)
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{
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int ret = 0;
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dasd_information2_t dasd_info2 = { 0 };
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if (!dev_open_readonly(dev))
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return_0;
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if (ioctl(dev->fd, BIODASDINFO2, &dasd_info2)) {
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log_sys_error("ioctl BIODASDINFO2", dev_name(dev));
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goto out;
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}
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if (dasd_info2.format == DASD_FORMAT_CDL)
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ret = 1;
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out:
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if (!dev_close(dev))
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stack;
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return ret;
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}
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#else
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int dasd_is_cdl_formatted(struct device *dev)
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{
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return 0;
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}
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#endif
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