dasd_ioctl.c revision ba465d830ed1703713251917f154688ec537580f
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> 195a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 20880348653ec2eda81550a8aa37c2eb625922f695Heiko Carstens#include <asm/compat.h> 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{ 4565f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber struct dasd_device *base; 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 4913c6204facb01d425320411c17febff666875518Christoph Hellwig 5065f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber base = dasd_device_from_gendisk(bdev->bd_disk); 5165f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber if (!base) 5265f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber return -ENODEV; 5365f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber 5465f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dasd_enable_device(base); 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Formatting the dasd device can change the capacity. */ 56c039e3134ae62863bbc8e8429b29e3c43cf21b2aArjan van de Ven mutex_lock(&bdev->bd_mutex); 5765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber i_size_write(bdev->bd_inode, 5865f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber (loff_t)get_capacity(base->block->gdp) << 9); 59c039e3134ae62863bbc8e8429b29e3c43cf21b2aArjan van de Ven mutex_unlock(&bdev->bd_mutex); 6065f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dasd_put_device(base); 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disable device. 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Used by dasdfmt. Disable I/O operations but allow ioctls. 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 6913c6204facb01d425320411c17febff666875518Christoph Hellwigdasd_ioctl_disable(struct block_device *bdev) 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7165f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber struct dasd_device *base; 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 7513c6204facb01d425320411c17febff666875518Christoph Hellwig 7665f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber base = dasd_device_from_gendisk(bdev->bd_disk); 7765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber if (!base) 7865f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber return -ENODEV; 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Man this is sick. We don't do a real disable but only downgrade 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the device to DASD_STATE_BASIC. The reason is that dasdfmt uses 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BIODASDDISABLE to disable accesses to the device via the block 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * device layer but it still wants to do i/o on the device by 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * using the BIODASDFMT ioctl. Therefore the correct state for the 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * device is DASD_STATE_BASIC that allows to do basic i/o. 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dasd_set_target_state(base, DASD_STATE_BASIC); 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set i_size to zero, since read, write, etc. check against this 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * value. 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 92c039e3134ae62863bbc8e8429b29e3c43cf21b2aArjan van de Ven mutex_lock(&bdev->bd_mutex); 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i_size_write(bdev->bd_inode, 0); 94c039e3134ae62863bbc8e8429b29e3c43cf21b2aArjan van de Ven mutex_unlock(&bdev->bd_mutex); 9565f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dasd_put_device(base); 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Quiesce device. 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1028e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_quiesce(struct dasd_block *block) 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 1058e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_device *base; 106138c014dcba74211dc4e835658f34a787c40cf17Horst Hummel 1078e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber base = block->base; 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable (CAP_SYS_ADMIN)) 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 110138c014dcba74211dc4e835658f34a787c40cf17Horst Hummel 111ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland pr_info("%s: The DASD has been put in the quiesce " 112ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland "state\n", dev_name(&base->cdev->dev)); 1138e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); 114eb6e199bef288611157b8198c25d12b32bf058d0Stefan Weinhuber dasd_device_set_stop_bits(base, DASD_STOPPED_QUIESCE); 1158e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 121fc19f381b3828aa4f8a3417dbefc3418ec6bbe10Stefan Haberland * Resume device. 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1238e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_resume(struct dasd_block *block) 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 1268e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_device *base; 127138c014dcba74211dc4e835658f34a787c40cf17Horst Hummel 1288e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber base = block->base; 129138c014dcba74211dc4e835658f34a787c40cf17Horst Hummel if (!capable (CAP_SYS_ADMIN)) 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 132ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland pr_info("%s: I/O operations have been resumed " 133ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland "on the DASD\n", dev_name(&base->cdev->dev)); 1348e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); 135eb6e199bef288611157b8198c25d12b32bf058d0Stefan Weinhuber dasd_device_remove_stop_bits(base, DASD_STOPPED_QUIESCE); 1368e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1388e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_schedule_block_bh(block); 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * performs formatting of _device_ according to _fdata_ 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: The discipline's format_function is assumed to deliver formatting 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * commands to format a single unit of the device. In terms of the ECKD 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * devices this means CCWs are generated to format a single track. 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1488e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_format(struct dasd_block *block, struct format_data_t *fdata) 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ccw_req *cqr; 1518e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_device *base; 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1548e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber base = block->base; 1558e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (base->discipline->format_device == NULL) 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EPERM; 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1588e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (base->state != DASD_STATE_BASIC) { 159ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland pr_warning("%s: The DASD cannot be formatted while it is " 160ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland "enabled\n", dev_name(&base->cdev->dev)); 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1648e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber DBF_DEV_EVENT(DBF_NOTICE, base, 165b44b0ab3bac16356f03e94b1b49ba9305710c445Stefan Weinhuber "formatting units %u to %u (%u B blocks) flags %u", 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->start_unit, 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->stop_unit, fdata->blksize, fdata->intensity); 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Since dasdfmt keeps the device open after it was disabled, 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * there still exists an inode for this device. 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We must update i_blkbits, otherwise we might get errors when 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * enabling the device later. 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fdata->start_unit == 0) { 1758e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct block_device *bdev = bdget_disk(block->gdp, 0); 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize); 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bdput(bdev); 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (fdata->start_unit <= fdata->stop_unit) { 1818e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber cqr = base->discipline->format_device(base, fdata); 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(cqr)) 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return PTR_ERR(cqr); 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = dasd_sleep_on_interruptible(cqr); 1858e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) { 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != -ERESTARTSYS) 188ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland pr_err("%s: Formatting unit %d failed with " 189ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland "rc=%d\n", dev_name(&base->cdev->dev), 190ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland fdata->start_unit, rc); 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->start_unit++; 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Format device. 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 20213c6204facb01d425320411c17febff666875518Christoph Hellwigdasd_ioctl_format(struct block_device *bdev, void __user *argp) 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20465f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber struct dasd_device *base; 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct format_data_t fdata; 20665f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber int rc; 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 21013c6204facb01d425320411c17febff666875518Christoph Hellwig if (!argp) 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 21265f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber base = dasd_device_from_gendisk(bdev->bd_disk); 21365f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber if (!base) 21465f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber return -ENODEV; 21565f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber if (base->features & DASD_FEATURE_READONLY || 21665f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { 21765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dasd_put_device(base); 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EROFS; 21965f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber } 22065f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) { 22165f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dasd_put_device(base); 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 22365f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber } 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bdev != bdev->bd_contains) { 225ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland pr_warning("%s: The specified DASD is a partition and cannot " 226ca99dab01dd63dcc413395bd3e75b0be152dfefcStefan Haberland "be formatted\n", 22765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dev_name(&base->cdev->dev)); 22865f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dasd_put_device(base); 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23165f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_format(base->block, &fdata); 23265f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dasd_put_device(base); 23365f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber return rc; 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_DASD_PROFILE 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reset device profile information 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2408e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_reset_profile(struct dasd_block *block) 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2424fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber dasd_profile_reset(&block->profile); 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return device profile information 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2498e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2514fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber struct dasd_profile_info_t *data; 252ba465d830ed1703713251917f154688ec537580fJulia Lawall int rc = 0; 2534fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber 2544fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber data = kmalloc(sizeof(*data), GFP_KERNEL); 2554fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber if (!data) 2564fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber return -ENOMEM; 2574fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber 2584fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber spin_lock_bh(&block->profile.lock); 2594fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber if (block->profile.data) { 2604fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber data->dasd_io_reqs = block->profile.data->dasd_io_reqs; 2614fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber data->dasd_io_sects = block->profile.data->dasd_io_sects; 2624fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber memcpy(data->dasd_io_secs, block->profile.data->dasd_io_secs, 2634fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber sizeof(data->dasd_io_secs)); 2644fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber memcpy(data->dasd_io_times, block->profile.data->dasd_io_times, 2654fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber sizeof(data->dasd_io_times)); 2664fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber memcpy(data->dasd_io_timps, block->profile.data->dasd_io_timps, 2674fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber sizeof(data->dasd_io_timps)); 2684fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber memcpy(data->dasd_io_time1, block->profile.data->dasd_io_time1, 2694fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber sizeof(data->dasd_io_time1)); 2704fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber memcpy(data->dasd_io_time2, block->profile.data->dasd_io_time2, 2714fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber sizeof(data->dasd_io_time2)); 2724fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber memcpy(data->dasd_io_time2ps, 2734fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber block->profile.data->dasd_io_time2ps, 2744fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber sizeof(data->dasd_io_time2ps)); 2754fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber memcpy(data->dasd_io_time3, block->profile.data->dasd_io_time3, 2764fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber sizeof(data->dasd_io_time3)); 2774fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber memcpy(data->dasd_io_nr_req, 2784fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber block->profile.data->dasd_io_nr_req, 2794fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber sizeof(data->dasd_io_nr_req)); 2804fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber spin_unlock_bh(&block->profile.lock); 2814fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber } else { 2824fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber spin_unlock_bh(&block->profile.lock); 283ba465d830ed1703713251917f154688ec537580fJulia Lawall rc = -EIO; 284ba465d830ed1703713251917f154688ec537580fJulia Lawall goto out; 2854fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber } 2864fa52aa7a82f9226b3874a69816bda3af821f002Stefan Weinhuber if (copy_to_user(argp, data, sizeof(*data))) 287ba465d830ed1703713251917f154688ec537580fJulia Lawall rc = -EFAULT; 288ba465d830ed1703713251917f154688ec537580fJulia Lawallout: 289ba465d830ed1703713251917f154688ec537580fJulia Lawall kfree(data); 290ba465d830ed1703713251917f154688ec537580fJulia Lawall return rc; 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 2938e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_reset_profile(struct dasd_block *block) 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOSYS; 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2988e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOSYS; 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3078e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_information(struct dasd_block *block, 3088e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber unsigned int cmd, void __user *argp) 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_information2_t *dasd_info; 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 312c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel int rc; 3138e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber struct dasd_device *base; 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ccw_device *cdev; 3159a92fe48b92993bb3d20fd7021e22a1ab8a473dfCornelia Huck struct ccw_dev_id dev_id; 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3178e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber base = block->base; 318294001a80c9810e2fe27aaaad7df8be12a103065Stefan Haberland if (!base->discipline || !base->discipline->fill_info) 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 321554a826e0a29f1a88e5a5332f0718c059885ec17Horst Hummel dasd_info = kzalloc(sizeof(struct dasd_information2_t), GFP_KERNEL); 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (dasd_info == NULL) 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3258e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber rc = base->discipline->fill_info(base, dasd_info); 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) { 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(dasd_info); 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3318e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber cdev = base->cdev; 3329a92fe48b92993bb3d20fd7021e22a1ab8a473dfCornelia Huck ccw_device_get_id(cdev, &dev_id); 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3349a92fe48b92993bb3d20fd7021e22a1ab8a473dfCornelia Huck dasd_info->devno = dev_id.devno; 3358e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_info->schid = _ccw_device_get_subchannel_number(base->cdev); 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->cu_type = cdev->id.cu_type; 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->cu_model = cdev->id.cu_model; 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->dev_type = cdev->id.dev_type; 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->dev_model = cdev->id.dev_model; 3408e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_info->status = base->state; 34157467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel /* 34257467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel * The open_count is increased for every opener, that includes 34357467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel * the blkdev_get in dasd_scan_partitions. 34457467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel * This must be hidden from user-space. 34557467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel */ 3468e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber dasd_info->open_count = atomic_read(&block->open_count); 3478e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (!block->bdev) 34857467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel dasd_info->open_count++; 349138c014dcba74211dc4e835658f34a787c40cf17Horst Hummel 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * check if device is really formatted 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LDL / CDL was returned by 'fill_info' 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3548e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if ((base->state < DASD_STATE_READY) || 3558e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber (dasd_check_blocksize(block->bp_block))) 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->format = DASD_FORMAT_NONE; 357f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 358c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel dasd_info->features |= 3598e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber ((base->features & DASD_FEATURE_READONLY) != 0); 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 361294001a80c9810e2fe27aaaad7df8be12a103065Stefan Haberland memcpy(dasd_info->type, base->discipline->name, 4); 362554a826e0a29f1a88e5a5332f0718c059885ec17Horst Hummel 3638e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber if (block->request_queue->request_fn) { 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *l; 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DASD_EXTENDED_PROFILING 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *l; 3688e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_lock_irqsave(&block->lock, flags); 3698e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber list_for_each(l, &block->request_queue->queue_head) 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->req_queue_len++; 3718e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_unlock_irqrestore(&block->lock, flags); 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* DASD_EXTENDED_PROFILING */ 3748e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); 3758e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber list_for_each(l, &base->ccw_queue) 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->chanq_len++; 3778e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flags); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = 0; 38213c6204facb01d425320411c17febff666875518Christoph Hellwig if (copy_to_user(argp, dasd_info, 38313c6204facb01d425320411c17febff666875518Christoph Hellwig ((cmd == (unsigned int) BIODASDINFO2) ? 3848e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber sizeof(struct dasd_information2_t) : 3858e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber sizeof(struct dasd_information_t)))) 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EFAULT; 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(dasd_info); 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set read only 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 39513c6204facb01d425320411c17febff666875518Christoph Hellwigdasd_ioctl_set_ro(struct block_device *bdev, void __user *argp) 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 39765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber struct dasd_device *base; 39865f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber int intval, rc; 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bdev != bdev->bd_contains) 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ro setting is not allowed for partitions 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 405d2c993d845781d160a7ef759a3e65c6892c4a270Heiko Carstens if (get_user(intval, (int __user *)argp)) 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 40765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber base = dasd_device_from_gendisk(bdev->bd_disk); 40865f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber if (!base) 40965f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber return -ENODEV; 41065f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber if (!intval && test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { 41165f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dasd_put_device(base); 41233b62a30f78536b976183cc764c08038ac011e0aStefan Weinhuber return -EROFS; 41365f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber } 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_disk_ro(bdev->bd_disk, intval); 41565f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_set_feature(base->cdev, DASD_FEATURE_READONLY, intval); 41665f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dasd_put_device(base); 41765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber return rc; 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4208e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuberstatic int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd, 421880348653ec2eda81550a8aa37c2eb625922f695Heiko Carstens struct cmbdata __user *argp) 4228b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig{ 4238b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig size_t size = _IOC_SIZE(cmd); 4248b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig struct cmbdata data; 4258b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig int ret; 4268b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig 4278e09f21574ea3028d5629e5de759e0b196c690c5Stefan Weinhuber ret = cmf_readall(block->base->cdev, &data); 4288b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp)))) 4298b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig return -EFAULT; 4308b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig return ret; 4318b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig} 4328b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig 433cfdb00a77ea7d5fb922fd985e5dfbcb36873411bArnd Bergmannint dasd_ioctl(struct block_device *bdev, fmode_t mode, 434cfdb00a77ea7d5fb922fd985e5dfbcb36873411bArnd Bergmann unsigned int cmd, unsigned long arg) 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 43665f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber struct dasd_block *block; 43765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber struct dasd_device *base; 438880348653ec2eda81550a8aa37c2eb625922f695Heiko Carstens void __user *argp; 43965f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber int rc; 440880348653ec2eda81550a8aa37c2eb625922f695Heiko Carstens 441880348653ec2eda81550a8aa37c2eb625922f695Heiko Carstens if (is_compat_task()) 442880348653ec2eda81550a8aa37c2eb625922f695Heiko Carstens argp = compat_ptr(arg); 443880348653ec2eda81550a8aa37c2eb625922f695Heiko Carstens else 444880348653ec2eda81550a8aa37c2eb625922f695Heiko Carstens argp = (void __user *)arg; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44613c6204facb01d425320411c17febff666875518Christoph Hellwig if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) { 44713c6204facb01d425320411c17febff666875518Christoph Hellwig PRINT_DEBUG("empty data ptr"); 44813c6204facb01d425320411c17febff666875518Christoph Hellwig return -EINVAL; 44913c6204facb01d425320411c17febff666875518Christoph Hellwig } 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45165f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber base = dasd_device_from_gendisk(bdev->bd_disk); 45265f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber if (!base) 45365f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber return -ENODEV; 45465f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber block = base->block; 45565f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = 0; 45613c6204facb01d425320411c17febff666875518Christoph Hellwig switch (cmd) { 45713c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDDISABLE: 45865f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_disable(bdev); 45965f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 46013c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDENABLE: 46165f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_enable(bdev); 46265f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 46313c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDQUIESCE: 46465f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_quiesce(block); 46565f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 46613c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDRESUME: 46765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_resume(block); 46865f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 46913c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDFMT: 47065f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_format(bdev, argp); 47165f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 47213c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDINFO: 47365f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_information(block, cmd, argp); 47465f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 47513c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDINFO2: 47665f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_information(block, cmd, argp); 47765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 47813c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDPRRD: 47965f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_read_profile(block, argp); 48065f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 48113c6204facb01d425320411c17febff666875518Christoph Hellwig case BIODASDPRRST: 48265f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_reset_profile(block); 48365f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 48413c6204facb01d425320411c17febff666875518Christoph Hellwig case BLKROSET: 48565f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_set_ro(bdev, argp); 48665f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 48713c6204facb01d425320411c17febff666875518Christoph Hellwig case DASDAPIVER: 48865f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_api_version(argp); 48965f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 4908b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig case BIODASDCMFENABLE: 49165f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = enable_cmf(base->cdev); 49265f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 4938b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig case BIODASDCMFDISABLE: 49465f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = disable_cmf(base->cdev); 49565f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 4968b2eb664ce9dcba8b54ececf5e057470c47e57f7Christoph Hellwig case BIODASDREADALLCMB: 49765f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = dasd_ioctl_readall_cmb(block, cmd, argp); 49865f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber break; 49913c6204facb01d425320411c17febff666875518Christoph Hellwig default: 5001107ccfbdef280fedc677af3bdbc405611ba554aChristoph Hellwig /* if the discipline has an ioctl method try it. */ 50165f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber if (base->discipline->ioctl) { 50265f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = base->discipline->ioctl(block, cmd, argp); 50365f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber if (rc == -ENOIOCTLCMD) 50465f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = -EINVAL; 50565f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber } else 50665f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber rc = -EINVAL; 50713c6204facb01d425320411c17febff666875518Christoph Hellwig } 50865f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber dasd_put_device(base); 50965f8da475995f667af5298c644707dbd9d646ca6Stefan Weinhuber return rc; 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 511