dasd_ioctl.c revision 8262037f406dc8e0908ad51f355c3dfd4d662aba
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 * 109a7af289660dc749d7c58234191601046a9bf488Horst Hummel * $Revision: 1.50 $ 11f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * i/o controls for the dasd driver. 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/config.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/interrupt.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/major.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/blkpg.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/ccwdev.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* This is ugly... */ 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PRINTK_HEADER "dasd_ioctl:" 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "dasd_int.h" 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SECTION: ioctl functions. 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct list_head dasd_ioctl_list = LIST_HEAD_INIT(dasd_ioctl_list); 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Find the ioctl with number no. 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct dasd_ioctl * 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_find_ioctl(int no) 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ioctl *ioctl; 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (ioctl, &dasd_ioctl_list, list) 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ioctl->no == no) 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ioctl; 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Register ioctl with number no. 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_no_register(struct module *owner, int no, dasd_ioctl_fn_t handler) 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ioctl *new; 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (dasd_find_ioctl(no)) 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new = kmalloc(sizeof (struct dasd_ioctl), GFP_KERNEL); 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new == NULL) 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new->owner = owner; 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new->no = no; 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new->handler = handler; 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add(&new->list, &dasd_ioctl_list); 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Deregister ioctl with number no. 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_no_unregister(struct module *owner, int no, dasd_ioctl_fn_t handler) 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ioctl *old = dasd_find_ioctl(no); 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old == NULL) 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOENT; 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old->no != no || old->handler != handler || owner != old->owner) 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del(&old->list); 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(old); 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl(struct inode *inp, struct file *filp, 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int no, unsigned long data) 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct block_device *bdev = inp->i_bdev; 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device = bdev->bd_disk->private_data; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ioctl *ioctl; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const char *dir; 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((_IOC_DIR(no) != _IOC_NONE) && (data == 0)) { 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PRINT_DEBUG("empty data ptr"); 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dir = _IOC_DIR (no) == _IOC_NONE ? "0" : 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _IOC_DIR (no) == _IOC_READ ? "r" : 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _IOC_DIR (no) == _IOC_WRITE ? "w" : 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _IOC_DIR (no) == (_IOC_READ | _IOC_WRITE) ? "rw" : "u"; 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBF_DEV_EVENT(DBF_DEBUG, device, 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ioctl 0x%08x %s'0x%x'%d(%d) with data %8lx", no, 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dir, _IOC_TYPE(no), _IOC_NR(no), _IOC_SIZE(no), data); 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Search for ioctl no in the ioctl list. */ 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(ioctl, &dasd_ioctl_list, list) { 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ioctl->no == no) { 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Found a matching ioctl. Call it. */ 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!try_module_get(ioctl->owner)) 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = ioctl->handler(bdev, no, data); 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds module_put(ioctl->owner); 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* No ioctl with number no. */ 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "unknown ioctl 0x%08x=%s'0x%x'%d(%d) data %8lx", no, 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dir, _IOC_TYPE(no), _IOC_NR(no), _IOC_SIZE(no), data); 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1218262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwiglong 1228262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwigdasd_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1238262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig{ 1248262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig int rval; 1258262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig 1268262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig lock_kernel(); 1278262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig rval = dasd_ioctl(filp->f_dentry->d_inode, filp, cmd, arg); 1288262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig unlock_kernel(); 1298262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig 1308262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig return (rval == -EINVAL) ? -ENOIOCTLCMD : rval; 1318262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig} 1328262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_api_version(struct block_device *bdev, int no, long args) 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ver = DASD_API_VERSION; 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return put_user(ver, (int __user *) args); 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Enable device. 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * used by dasdfmt after BIODASDDISABLE to retrigger blocksize detection 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_enable(struct block_device *bdev, int no, long args) 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_enable_device(device); 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Formatting the dasd device can change the capacity. */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down(&bdev->bd_sem); 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i_size_write(bdev->bd_inode, (loff_t)get_capacity(device->gdp) << 9); 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up(&bdev->bd_sem); 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disable device. 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Used by dasdfmt. Disable I/O operations but allow ioctls. 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_disable(struct block_device *bdev, int no, long args) 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Man this is sick. We don't do a real disable but only downgrade 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the device to DASD_STATE_BASIC. The reason is that dasdfmt uses 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BIODASDDISABLE to disable accesses to the device via the block 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * device layer but it still wants to do i/o on the device by 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * using the BIODASDFMT ioctl. Therefore the correct state for the 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * device is DASD_STATE_BASIC that allows to do basic i/o. 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_set_target_state(device, DASD_STATE_BASIC); 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set i_size to zero, since read, write, etc. check against this 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * value. 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down(&bdev->bd_sem); 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i_size_write(bdev->bd_inode, 0); 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up(&bdev->bd_sem); 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Quiesce device. 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_quiesce(struct block_device *bdev, int no, long args) 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable (CAP_SYS_ADMIN)) 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEV_MESSAGE (KERN_DEBUG, device, "%s", 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Quiesce IO on device"); 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device->stopped |= DASD_STOPPED_QUIESCE; 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Quiesce device. 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_resume(struct block_device *bdev, int no, long args) 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable (CAP_SYS_ADMIN)) 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEV_MESSAGE (KERN_DEBUG, device, "%s", 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "resume IO on device"); 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device->stopped &= ~DASD_STOPPED_QUIESCE; 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_schedule_bh (device); 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * performs formatting of _device_ according to _fdata_ 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: The discipline's format_function is assumed to deliver formatting 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * commands to format a single unit of the device. In terms of the ECKD 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * devices this means CCWs are generated to format a single track. 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_format(struct dasd_device * device, struct format_data_t * fdata) 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ccw_req *cqr; 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device->discipline->format_device == NULL) 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EPERM; 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device->state != DASD_STATE_BASIC) { 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "dasd_format: device is not disabled! "); 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBF_DEV_EVENT(DBF_NOTICE, device, 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "formatting units %d to %d (%d B blocks) flags %d", 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->start_unit, 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->stop_unit, fdata->blksize, fdata->intensity); 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Since dasdfmt keeps the device open after it was disabled, 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * there still exists an inode for this device. 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We must update i_blkbits, otherwise we might get errors when 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * enabling the device later. 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fdata->start_unit == 0) { 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct block_device *bdev = bdget_disk(device->gdp, 0); 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize); 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bdput(bdev); 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (fdata->start_unit <= fdata->stop_unit) { 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cqr = device->discipline->format_device(device, fdata); 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(cqr)) 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return PTR_ERR(cqr); 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = dasd_sleep_on_interruptible(cqr); 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_sfree_request(cqr, cqr->device); 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) { 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != -ERESTARTSYS) 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEV_MESSAGE(KERN_ERR, device, 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds " Formatting of unit %d failed " 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "with rc = %d", 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->start_unit, rc); 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->start_unit++; 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Format device. 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_format(struct block_device *bdev, int no, long args) 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct format_data_t fdata; 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!args) 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* fdata == NULL is no longer a valid arg to dasd_format ! */ 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 321f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 322c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel if (device->features & DASD_FEATURE_READONLY) 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EROFS; 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(&fdata, (void __user *) args, 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct format_data_t))) 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bdev != bdev->bd_contains) { 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Cannot low-level format a partition"); 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return dasd_format(device, &fdata); 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_DASD_PROFILE 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reset device profile information 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_reset_profile(struct block_device *bdev, int no, long args) 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(&device->profile, 0, sizeof (struct dasd_profile_info_t)); 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return device profile information 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_read_profile(struct block_device *bdev, int no, long args) 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3679a7af289660dc749d7c58234191601046a9bf488Horst Hummel if (dasd_profile_level == DASD_PROFILE_OFF) 3689a7af289660dc749d7c58234191601046a9bf488Horst Hummel return -EIO; 3699a7af289660dc749d7c58234191601046a9bf488Horst Hummel 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_to_user((long __user *) args, (long *) &device->profile, 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct dasd_profile_info_t))) 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_reset_profile(struct block_device *bdev, int no, long args) 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOSYS; 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_read_profile(struct block_device *bdev, int no, long args) 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOSYS; 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_information(struct block_device *bdev, int no, long args) 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_information2_t *dasd_info; 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 398c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel int rc; 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ccw_device *cdev; 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!device->discipline->fill_info) 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info = kmalloc(sizeof(struct dasd_information2_t), GFP_KERNEL); 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (dasd_info == NULL) 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = device->discipline->fill_info(device, dasd_info); 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) { 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(dasd_info); 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cdev = device->cdev; 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->devno = _ccw_device_get_device_number(device->cdev); 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->schid = _ccw_device_get_subchannel_number(device->cdev); 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->cu_type = cdev->id.cu_type; 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->cu_model = cdev->id.cu_model; 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->dev_type = cdev->id.dev_type; 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->dev_model = cdev->id.dev_model; 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->open_count = atomic_read(&device->open_count); 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->status = device->state; 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * check if device is really formatted 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LDL / CDL was returned by 'fill_info' 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((device->state < DASD_STATE_READY) || 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (dasd_check_blocksize(device->bp_block))) 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->format = DASD_FORMAT_NONE; 436f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 437c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel dasd_info->features |= 438c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel ((device->features & DASD_FEATURE_READONLY) != 0); 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device->discipline) 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(dasd_info->type, device->discipline->name, 4); 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(dasd_info->type, "none", 4); 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->req_queue_len = 0; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->chanq_len = 0; 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device->request_queue->request_fn) { 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *l; 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DASD_EXTENDED_PROFILING 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *l; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&device->lock, flags); 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each(l, &device->request_queue->queue_head) 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->req_queue_len++; 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&device->lock, flags); 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* DASD_EXTENDED_PROFILING */ 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each(l, &device->ccw_queue) 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->chanq_len++; 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flags); 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = 0; 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_to_user((long __user *) args, (long *) dasd_info, 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((no == (unsigned int) BIODASDINFO2) ? 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct dasd_information2_t) : 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct dasd_information_t)))) 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EFAULT; 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(dasd_info); 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set read only 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_set_ro(struct block_device *bdev, int no, long args) 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 481f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel int intval, rc; 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bdev != bdev->bd_contains) 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ro setting is not allowed for partitions 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (get_user(intval, (int __user *) args)) 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 493f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_disk_ro(bdev->bd_disk, intval); 495f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel rc = dasd_set_feature(device->cdev, DASD_FEATURE_READONLY, intval); 496f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 497f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel return rc; 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * List of static ioctls. 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct { int no; dasd_ioctl_fn_t fn; } dasd_ioctls[] = 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDDISABLE, dasd_ioctl_disable }, 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDENABLE, dasd_ioctl_enable }, 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDQUIESCE, dasd_ioctl_quiesce }, 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDRESUME, dasd_ioctl_resume }, 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDFMT, dasd_ioctl_format }, 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDINFO, dasd_ioctl_information }, 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDINFO2, dasd_ioctl_information }, 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDPRRD, dasd_ioctl_read_profile }, 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDPRRST, dasd_ioctl_reset_profile }, 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BLKROSET, dasd_ioctl_set_ro }, 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { DASDAPIVER, dasd_ioctl_api_version }, 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { -1, NULL } 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_init(void) 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; dasd_ioctls[i].no != -1; i++) 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_ioctl_no_register(NULL, dasd_ioctls[i].no, 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_ioctls[i].fn); 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_exit(void) 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; dasd_ioctls[i].no != -1; i++) 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_ioctl_no_unregister(NULL, dasd_ioctls[i].no, 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_ioctls[i].fn); 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(dasd_ioctl_no_register); 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(dasd_ioctl_no_unregister); 544