| /* |
| * 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.h" |
| #include "metadata.h" |
| #include "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 foramt and featueres. |
| */ |
| 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; |
| |
| 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 |