mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-21 13:34:40 +03:00
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
|
|
* Copyright (C) 2015 Red Hat, Inc. All rights reserved.
|
|
*
|
|
* This file is part of LVM2.
|
|
*
|
|
* This copyrighted material is made available to anyone wishing to use,
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
|
* of the GNU Lesser General Public License v.2.1.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "lib/misc/lib.h"
|
|
#include "lib/metadata/metadata.h"
|
|
#include "lib/device/dev-type.h"
|
|
#include <sys/ioctl.h>
|
|
|
|
#ifdef __linux__
|
|
|
|
/*
|
|
* Interface taken from kernel header arch/s390/include/uapi/asm/dasd.h
|
|
*/
|
|
|
|
/*
|
|
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
|
|
* Copyright IBM Corp. 1999, 2000
|
|
* EMC Symmetrix ioctl Copyright EMC Corporation, 2008
|
|
* Author.........: Nigel Hislop <hislop_nigel@emc.com>
|
|
*/
|
|
|
|
#define DASD_IOCTL_LETTER 'D'
|
|
#define DASD_API_VERSION 6
|
|
|
|
/*
|
|
* struct dasd_information2_t
|
|
* represents any data about the device, which is visible to userspace.
|
|
* including format and features.
|
|
*/
|
|
typedef struct dasd_information2_t {
|
|
unsigned int devno; /* S/390 devno */
|
|
unsigned int real_devno; /* for aliases */
|
|
unsigned int schid; /* S/390 subchannel identifier */
|
|
unsigned int cu_type : 16; /* from SenseID */
|
|
unsigned int cu_model : 8; /* from SenseID */
|
|
unsigned int dev_type : 16; /* from SenseID */
|
|
unsigned int dev_model : 8; /* from SenseID */
|
|
unsigned int open_count;
|
|
unsigned int req_queue_len;
|
|
unsigned int chanq_len; /* length of chanq */
|
|
char type[4]; /* from discipline.name, 'none' for unknown */
|
|
unsigned int status; /* current device level */
|
|
unsigned int label_block; /* where to find the VOLSER */
|
|
unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
|
|
unsigned int characteristics_size;
|
|
unsigned int confdata_size;
|
|
char characteristics[64]; /* from read_device_characteristics */
|
|
char configuration_data[256]; /* from read_configuration_data */
|
|
unsigned int format; /* format info like formatted/cdl/ldl/... */
|
|
unsigned int features; /* dasd features like 'ro',... */
|
|
unsigned int reserved0; /* reserved for further use ,... */
|
|
unsigned int reserved1; /* reserved for further use ,... */
|
|
unsigned int reserved2; /* reserved for further use ,... */
|
|
unsigned int reserved3; /* reserved for further use ,... */
|
|
unsigned int reserved4; /* reserved for further use ,... */
|
|
unsigned int reserved5; /* reserved for further use ,... */
|
|
unsigned int reserved6; /* reserved for further use ,... */
|
|
unsigned int reserved7; /* reserved for further use ,... */
|
|
} dasd_information2_t;
|
|
|
|
#define DASD_FORMAT_CDL 2
|
|
|
|
/* Get information on a dasd device (enhanced) */
|
|
#define BIODASDINFO2 _IOR(DASD_IOCTL_LETTER,3,dasd_information2_t)
|
|
|
|
/*
|
|
* End of included interface.
|
|
*/
|
|
|
|
int dasd_is_cdl_formatted(struct device *dev)
|
|
{
|
|
int ret = 0;
|
|
dasd_information2_t dasd_info2 = { 0 };
|
|
|
|
if (!dev_open_readonly(dev))
|
|
return_0;
|
|
|
|
if (ioctl(dev->fd, BIODASDINFO2, &dasd_info2)) {
|
|
log_sys_error("ioctl BIODASDINFO2", dev_name(dev));
|
|
goto out;
|
|
}
|
|
|
|
if (dasd_info2.format == DASD_FORMAT_CDL)
|
|
ret = 1;
|
|
|
|
out:
|
|
if (!dev_close(dev))
|
|
stack;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#else
|
|
|
|
int dasd_is_cdl_formatted(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif
|