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75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
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/*
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "lib.h"
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#include "metadata.h"
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#include "dev-type.h"
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#include <sys/ioctl.h>
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typedef struct dasd_information_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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unsigned char characteristics[64];/*from read_device_characteristics */
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unsigned 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_information_t;
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#define DASD_FORMAT_CDL 2
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#define BIODASDINFO2 _IOR('D', 3, dasd_information_t)
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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_information_t dasd_info;
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if (!dev_open_readonly(dev)) {
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stack;
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return ret;
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}
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if (ioctl(dev->fd, BIODASDINFO2, &dasd_info) != 0)
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goto_out;
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if (dasd_info.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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