dasd_ioctl.c revision ca99dab01dd63dcc413395bd3e75b0be152dfefc
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * File...........: linux/drivers/s390/block/dasd_ioctl.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999-2001 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * i/o controls for the dasd driver. 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12fc19f381b3828aa4f8a3417dbefc3418ec6bbe10Stefan Haberland 13fc19f381b3828aa4f8a3417dbefc3418ec6bbe10Stefan Haberland#define KMSG_COMPONENT "dasd" 14fc19f381b3828aa4f8a3417dbefc3418ec6bbe10Stefan Haberland 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/interrupt.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/major.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/blkpg.h> 19405f55712dfe464b3240d7816cc4fe4174831be2Alexey Dobriyan#include <linux/smp_lock.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/ccwdev.h> 228b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig#include <asm/cmb.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* This is ugly... */ 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PRINTK_HEADER "dasd_ioctl:" 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "dasd_int.h" 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3213c6204facb01d425320411c17febff666875518Christoph Hellwigdasd_ioctl_api_version(void __user *argp) 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ver = DASD_API_VERSION; 35b5029622ac86bb441dc5e641226fb1152fca02d7Bastian Blank return put_user(ver, (int __user *)argp); 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Enable device. 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * used by dasdfmt after BIODASDDISABLE to retrigger blocksize detection 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 4313c6204facb01d425320411c17febff666875518Christoph Hellwigdasd_ioctl_enable(struct block_device *bdev) 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 458e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_block *block = bdev->bd_disk->private_data; 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 4913c6204facb01d425320411c17febff666875518Christoph Hellwig 508e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_enable_device(block->base); 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Formatting the dasd device can change the capacity. */ 52c039e3134ae62863bbc8e8429b29e3c43cf21b2aArjan van de Ven mutex_lock(&bdev->bd_mutex); 538e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber i_size_write(bdev->bd_inode, (loff_t)get_capacity(block->gdp) << 9); 54c039e3134ae62863bbc8e8429b29e3c43cf21b2aArjan van de Ven mutex_unlock(&bdev->bd_mutex); 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disable device. 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Used by dasdfmt. Disable I/O operations but allow ioctls. 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 6313c6204facb01d425320411c17febff666875518Christoph Hellwigdasd_ioctl_disable(struct block_device *bdev) 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 658e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_block *block = bdev->bd_disk->private_data; 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 6913c6204facb01d425320411c17febff666875518Christoph Hellwig 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Man this is sick. We don't do a real disable but only downgrade 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the device to DASD_STATE_BASIC. The reason is that dasdfmt uses 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BIODASDDISABLE to disable accesses to the device via the block 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * device layer but it still wants to do i/o on the device by 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * using the BIODASDFMT ioctl. Therefore the correct state for the 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * device is DASD_STATE_BASIC that allows to do basic i/o. 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 788e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_set_target_state(block->base, DASD_STATE_BASIC); 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set i_size to zero, since read, write, etc. check against this 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * value. 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 83c039e3134ae62863bbc8e8429b29e3c43cf21b2aArjan van de Ven mutex_lock(&bdev->bd_mutex); 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i_size_write(bdev->bd_inode, 0); 85c039e3134ae62863bbc8e8429b29e3c43cf21b2aArjan van de Ven mutex_unlock(&bdev->bd_mutex); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Quiesce device. 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 928e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_quiesce(struct dasd_block *block) 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 958e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_device *base; 96138c014dcba74211dc4e835658f34a787c40cf17Horst Hummel 978e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber base = block->base; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable (CAP_SYS_ADMIN)) 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 100138c014dcba74211dc4e835658f34a787c40cf17Horst Hummel 101ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland pr_info("%s: The DASD has been put in the quiesce " 102ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland "state\n", dev_name(&base->cdev->dev)); 1038e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); 1048e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber base->stopped |= DASD_STOPPED_QUIESCE; 1058e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 111fc19f381b3828aa4f8a3417dbefc3418ec6bbe10Stefan Haberland * Resume device. 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1138e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_resume(struct dasd_block *block) 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 1168e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_device *base; 117138c014dcba74211dc4e835658f34a787c40cf17Horst Hummel 1188e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber base = block->base; 119138c014dcba74211dc4e835658f34a787c40cf17Horst Hummel if (!capable (CAP_SYS_ADMIN)) 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 122ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland pr_info("%s: I/O operations have been resumed " 123ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland "on the DASD\n", dev_name(&base->cdev->dev)); 1248e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); 1258e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber base->stopped &= ~DASD_STOPPED_QUIESCE; 1268e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1288e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_schedule_block_bh(block); 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * performs formatting of _device_ according to _fdata_ 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: The discipline's format_function is assumed to deliver formatting 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * commands to format a single unit of the device. In terms of the ECKD 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * devices this means CCWs are generated to format a single track. 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1388e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_format(struct dasd_block *block, struct format_data_t *fdata) 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ccw_req *cqr; 1418e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_device *base; 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1448e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber base = block->base; 1458e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (base->discipline->format_device == NULL) 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EPERM; 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1488e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (base->state != DASD_STATE_BASIC) { 149ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland pr_warning("%s: The DASD cannot be formatted while it is " 150ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland "enabled\n", dev_name(&base->cdev->dev)); 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1548e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber DBF_DEV_EVENT(DBF_NOTICE, base, 155b44b0ab3bac16356f03e94b1b49ba9305710c445Stefan Weinhuber "formatting units %u to %u (%u B blocks) flags %u", 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->start_unit, 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->stop_unit, fdata->blksize, fdata->intensity); 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Since dasdfmt keeps the device open after it was disabled, 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * there still exists an inode for this device. 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We must update i_blkbits, otherwise we might get errors when 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * enabling the device later. 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fdata->start_unit == 0) { 1658e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct block_device *bdev = bdget_disk(block->gdp, 0); 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize); 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bdput(bdev); 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (fdata->start_unit <= fdata->stop_unit) { 1718e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber cqr = base->discipline->format_device(base, fdata); 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(cqr)) 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return PTR_ERR(cqr); 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = dasd_sleep_on_interruptible(cqr); 1758e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) { 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != -ERESTARTSYS) 178ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland pr_err("%s: Formatting unit %d failed with " 179ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland "rc=%d\n", dev_name(&base->cdev->dev), 180ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland fdata->start_unit, rc); 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->start_unit++; 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Format device. 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 19213c6204facb01d425320411c17febff666875518Christoph Hellwigdasd_ioctl_format(struct block_device *bdev, void __user *argp) 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1948e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_block *block = bdev->bd_disk->private_data; 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct format_data_t fdata; 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 19913c6204facb01d425320411c17febff666875518Christoph Hellwig if (!argp) 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 201f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 2028e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (block->base->features & DASD_FEATURE_READONLY) 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EROFS; 20413c6204facb01d425320411c17febff666875518Christoph Hellwig if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bdev != bdev->bd_contains) { 207ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland pr_warning("%s: The specified DASD is a partition and cannot " 208ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland "be formatted\n", 209ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland dev_name(&block->base->cdev->dev)); 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2128e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber return dasd_format(block, &fdata); 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_DASD_PROFILE 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reset device profile information 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2198e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_reset_profile(struct dasd_block *block) 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2218e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber memset(&block->profile, 0, sizeof(struct dasd_profile_info_t)); 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return device profile information 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2288e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2309a7af289660dc749d7c58234191601046a9bf488Horst Hummel if (dasd_profile_level == DASD_PROFILE_OFF) 2319a7af289660dc749d7c58234191601046a9bf488Horst Hummel return -EIO; 2328e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (copy_to_user(argp, &block->profile, 2338e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber sizeof(struct dasd_profile_info_t))) 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 2388e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_reset_profile(struct dasd_block *block) 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOSYS; 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2438e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOSYS; 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2528e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_information(struct dasd_block *block, 2538e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber unsigned int cmd, void __user *argp) 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_information2_t *dasd_info; 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 257c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel int rc; 2588e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_device *base; 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ccw_device *cdev; 2609a92fe48b92993bb3d20fd7021e22a1ab8a473dfCornelia Huck struct ccw_dev_id dev_id; 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2628e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber base = block->base; 2638e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (!base->discipline->fill_info) 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 266554a826e0a29f1a88e5a5332f0718c059885ec17Horst Hummel dasd_info = kzalloc(sizeof(struct dasd_information2_t), GFP_KERNEL); 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (dasd_info == NULL) 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2708e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber rc = base->discipline->fill_info(base, dasd_info); 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) { 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(dasd_info); 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2768e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber cdev = base->cdev; 2779a92fe48b92993bb3d20fd7021e22a1ab8a473dfCornelia Huck ccw_device_get_id(cdev, &dev_id); 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2799a92fe48b92993bb3d20fd7021e22a1ab8a473dfCornelia Huck dasd_info->devno = dev_id.devno; 2808e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_info->schid = _ccw_device_get_subchannel_number(base->cdev); 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->cu_type = cdev->id.cu_type; 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->cu_model = cdev->id.cu_model; 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->dev_type = cdev->id.dev_type; 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->dev_model = cdev->id.dev_model; 2858e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_info->status = base->state; 28657467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel /* 28757467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel * The open_count is increased for every opener, that includes 28857467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel * the blkdev_get in dasd_scan_partitions. 28957467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel * This must be hidden from user-space. 29057467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel */ 2918e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_info->open_count = atomic_read(&block->open_count); 2928e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (!block->bdev) 29357467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel dasd_info->open_count++; 294138c014dcba74211dc4e835658f34a787c40cf17Horst Hummel 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * check if device is really formatted 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LDL / CDL was returned by 'fill_info' 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2998e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if ((base->state < DASD_STATE_READY) || 3008e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber (dasd_check_blocksize(block->bp_block))) 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->format = DASD_FORMAT_NONE; 302f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 303c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel dasd_info->features |= 3048e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber ((base->features & DASD_FEATURE_READONLY) != 0); 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3068e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (base->discipline) 3078e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber memcpy(dasd_info->type, base->discipline->name, 4); 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(dasd_info->type, "none", 4); 310554a826e0a29f1a88e5a5332f0718c059885ec17Horst Hummel 3118e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (block->request_queue->request_fn) { 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *l; 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DASD_EXTENDED_PROFILING 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *l; 3168e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_lock_irqsave(&block->lock, flags); 3178e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber list_for_each(l, &block->request_queue->queue_head) 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->req_queue_len++; 3198e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_unlock_irqrestore(&block->lock, flags); 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* DASD_EXTENDED_PROFILING */ 3228e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); 3238e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber list_for_each(l, &base->ccw_queue) 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->chanq_len++; 3258e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flags); 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = 0; 33013c6204facb01d425320411c17febff666875518Christoph Hellwig if (copy_to_user(argp, dasd_info, 33113c6204facb01d425320411c17febff666875518Christoph Hellwig ((cmd == (unsigned int) BIODASDINFO2) ? 3328e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber sizeof(struct dasd_information2_t) : 3338e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber sizeof(struct dasd_information_t)))) 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EFAULT; 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(dasd_info); 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set read only 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 34313c6204facb01d425320411c17febff666875518Christoph Hellwigdasd_ioctl_set_ro(struct block_device *bdev, void __user *argp) 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3458e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_block *block = bdev->bd_disk->private_data; 34613c6204facb01d425320411c17febff666875518Christoph Hellwig int intval; 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bdev != bdev->bd_contains) 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ro setting is not allowed for partitions 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 353d2c993d845781d160a7ef759a3e65c6892c4a270Heiko Carstens if (get_user(intval, (int __user *)argp)) 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 355f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_disk_ro(bdev->bd_disk, intval); 3578e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber return dasd_set_feature(block->base->cdev, DASD_FEATURE_READONLY, intval); 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3608e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd, 3618b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig unsigned long arg) 3628b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig{ 3638b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig struct cmbdata __user *argp = (void __user *) arg; 3648b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig size_t size = _IOC_SIZE(cmd); 3658b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig struct cmbdata data; 3668b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig int ret; 3678b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig 3688e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber ret = cmf_readall(block->base->cdev, &data); 3698b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp)))) 3708b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig return -EFAULT; 3718b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig return ret; 3728b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig} 3738b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig 3740000d031703c33b9ea909ad81f03762db66135e1Heiko Carstensstatic int 3750000d031703c33b9ea909ad81f03762db66135e1Heiko Carstensdasd_do_ioctl(struct block_device *bdev, fmode_t mode, 3760000d031703c33b9ea909ad81f03762db66135e1Heiko Carstens unsigned int cmd, unsigned long arg) 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3788e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_block *block = bdev->bd_disk->private_data; 37913c6204facb01d425320411c17febff666875518Christoph Hellwig void __user *argp = (void __user *)arg; 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3818e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (!block) 38213c6204facb01d425320411c17febff666875518Christoph Hellwig return -ENODEV; 38313c6204facb01d425320411c17febff666875518Christoph Hellwig 38413c6204facb01d425320411c17febff666875518Christoph Hellwig if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) { 38513c6204facb01d425320411c17febff666875518Christoph Hellwig PRINT_DEBUG("empty data ptr"); 38613c6204facb01d425320411c17febff666875518Christoph Hellwig return -EINVAL; 38713c6204facb01d425320411c17febff666875518Christoph Hellwig } 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38913c6204facb01d425320411c17febff666875518Christoph Hellwig switch (cmd) { 39013c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDDISABLE: 39113c6204facb01d425320411c17febff666875518Christoph Hellwig return dasd_ioctl_disable(bdev); 39213c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDENABLE: 39313c6204facb01d425320411c17febff666875518Christoph Hellwig return dasd_ioctl_enable(bdev); 39413c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDQUIESCE: 3958e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber return dasd_ioctl_quiesce(block); 39613c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDRESUME: 3978e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber return dasd_ioctl_resume(block); 39813c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDFMT: 39913c6204facb01d425320411c17febff666875518Christoph Hellwig return dasd_ioctl_format(bdev, argp); 40013c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDINFO: 4018e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber return dasd_ioctl_information(block, cmd, argp); 40213c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDINFO2: 4038e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber return dasd_ioctl_information(block, cmd, argp); 40413c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDPRRD: 4058e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber return dasd_ioctl_read_profile(block, argp); 40613c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDPRRST: 4078e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber return dasd_ioctl_reset_profile(block); 40813c6204facb01d425320411c17febff666875518Christoph Hellwig case BLKROSET: 40913c6204facb01d425320411c17febff666875518Christoph Hellwig return dasd_ioctl_set_ro(bdev, argp); 41013c6204facb01d425320411c17febff666875518Christoph Hellwig case DASDAPIVER: 41113c6204facb01d425320411c17febff666875518Christoph Hellwig return dasd_ioctl_api_version(argp); 4128b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig case BIODASDCMFENABLE: 4138e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber return enable_cmf(block->base->cdev); 4148b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig case BIODASDCMFDISABLE: 4158e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber return disable_cmf(block->base->cdev); 4168b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig case BIODASDREADALLCMB: 4178e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber return dasd_ioctl_readall_cmb(block, cmd, arg); 41813c6204facb01d425320411c17febff666875518Christoph Hellwig default: 4191107ccfbdef280fedc677af3bdbc405611ba554aChristoph Hellwig /* if the discipline has an ioctl method try it. */ 4208e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (block->base->discipline->ioctl) { 4218e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber int rval = block->base->discipline->ioctl(block, cmd, argp); 4221107ccfbdef280fedc677af3bdbc405611ba554aChristoph Hellwig if (rval != -ENOIOCTLCMD) 4231107ccfbdef280fedc677af3bdbc405611ba554aChristoph Hellwig return rval; 4241107ccfbdef280fedc677af3bdbc405611ba554aChristoph Hellwig } 4251107ccfbdef280fedc677af3bdbc405611ba554aChristoph Hellwig 42613c6204facb01d425320411c17febff666875518Christoph Hellwig return -EINVAL; 42713c6204facb01d425320411c17febff666875518Christoph Hellwig } 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4290000d031703c33b9ea909ad81f03762db66135e1Heiko Carstens 4300000d031703c33b9ea909ad81f03762db66135e1Heiko Carstensint dasd_ioctl(struct block_device *bdev, fmode_t mode, 4310000d031703c33b9ea909ad81f03762db66135e1Heiko Carstens unsigned int cmd, unsigned long arg) 4320000d031703c33b9ea909ad81f03762db66135e1Heiko Carstens{ 4330000d031703c33b9ea909ad81f03762db66135e1Heiko Carstens int rc; 4340000d031703c33b9ea909ad81f03762db66135e1Heiko Carstens 4350000d031703c33b9ea909ad81f03762db66135e1Heiko Carstens lock_kernel(); 4360000d031703c33b9ea909ad81f03762db66135e1Heiko Carstens rc = dasd_do_ioctl(bdev, mode, cmd, arg); 4370000d031703c33b9ea909ad81f03762db66135e1Heiko Carstens unlock_kernel(); 4380000d031703c33b9ea909ad81f03762db66135e1Heiko Carstens return rc; 4390000d031703c33b9ea909ad81f03762db66135e1Heiko Carstens} 440