dasd_ioctl.c revision 57467195d1581e354998d5cc35dfd7a12d6e0a24
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 */ 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/config.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/interrupt.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/major.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/blkpg.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/ccwdev.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* This is ugly... */ 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PRINTK_HEADER "dasd_ioctl:" 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "dasd_int.h" 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SECTION: ioctl functions. 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct list_head dasd_ioctl_list = LIST_HEAD_INIT(dasd_ioctl_list); 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Find the ioctl with number no. 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct dasd_ioctl * 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_find_ioctl(int no) 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ioctl *ioctl; 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (ioctl, &dasd_ioctl_list, list) 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ioctl->no == no) 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ioctl; 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Register ioctl with number no. 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_no_register(struct module *owner, int no, dasd_ioctl_fn_t handler) 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ioctl *new; 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (dasd_find_ioctl(no)) 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new = kmalloc(sizeof (struct dasd_ioctl), GFP_KERNEL); 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new == NULL) 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new->owner = owner; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new->no = no; 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new->handler = handler; 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add(&new->list, &dasd_ioctl_list); 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Deregister ioctl with number no. 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_no_unregister(struct module *owner, int no, dasd_ioctl_fn_t handler) 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ioctl *old = dasd_find_ioctl(no); 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old == NULL) 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOENT; 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old->no != no || old->handler != handler || owner != old->owner) 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del(&old->list); 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(old); 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl(struct inode *inp, struct file *filp, 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int no, unsigned long data) 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct block_device *bdev = inp->i_bdev; 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device = bdev->bd_disk->private_data; 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ioctl *ioctl; 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const char *dir; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((_IOC_DIR(no) != _IOC_NONE) && (data == 0)) { 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PRINT_DEBUG("empty data ptr"); 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dir = _IOC_DIR (no) == _IOC_NONE ? "0" : 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _IOC_DIR (no) == _IOC_READ ? "r" : 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _IOC_DIR (no) == _IOC_WRITE ? "w" : 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _IOC_DIR (no) == (_IOC_READ | _IOC_WRITE) ? "rw" : "u"; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBF_DEV_EVENT(DBF_DEBUG, device, 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ioctl 0x%08x %s'0x%x'%d(%d) with data %8lx", no, 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dir, _IOC_TYPE(no), _IOC_NR(no), _IOC_SIZE(no), data); 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Search for ioctl no in the ioctl list. */ 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(ioctl, &dasd_ioctl_list, list) { 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ioctl->no == no) { 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Found a matching ioctl. Call it. */ 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!try_module_get(ioctl->owner)) 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = ioctl->handler(bdev, no, data); 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds module_put(ioctl->owner); 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* No ioctl with number no. */ 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "unknown ioctl 0x%08x=%s'0x%x'%d(%d) data %8lx", no, 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dir, _IOC_TYPE(no), _IOC_NR(no), _IOC_SIZE(no), data); 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1198262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwiglong 1208262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwigdasd_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1218262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig{ 1228262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig int rval; 1238262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig 1248262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig lock_kernel(); 1258262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig rval = dasd_ioctl(filp->f_dentry->d_inode, filp, cmd, arg); 1268262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig unlock_kernel(); 1278262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig 1288262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig return (rval == -EINVAL) ? -ENOIOCTLCMD : rval; 1298262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig} 1308262037f406dc8e0908ad51f355c3dfd4d662abaChristoph Hellwig 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_api_version(struct block_device *bdev, int no, long args) 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ver = DASD_API_VERSION; 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return put_user(ver, (int __user *) args); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Enable device. 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * used by dasdfmt after BIODASDDISABLE to retrigger blocksize detection 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_enable(struct block_device *bdev, int no, long args) 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_enable_device(device); 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Formatting the dasd device can change the capacity. */ 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down(&bdev->bd_sem); 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i_size_write(bdev->bd_inode, (loff_t)get_capacity(device->gdp) << 9); 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up(&bdev->bd_sem); 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disable device. 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Used by dasdfmt. Disable I/O operations but allow ioctls. 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_disable(struct block_device *bdev, int no, long args) 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Man this is sick. We don't do a real disable but only downgrade 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the device to DASD_STATE_BASIC. The reason is that dasdfmt uses 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BIODASDDISABLE to disable accesses to the device via the block 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * device layer but it still wants to do i/o on the device by 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * using the BIODASDFMT ioctl. Therefore the correct state for the 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * device is DASD_STATE_BASIC that allows to do basic i/o. 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_set_target_state(device, DASD_STATE_BASIC); 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set i_size to zero, since read, write, etc. check against this 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * value. 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down(&bdev->bd_sem); 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i_size_write(bdev->bd_inode, 0); 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up(&bdev->bd_sem); 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Quiesce device. 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_quiesce(struct block_device *bdev, int no, long args) 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable (CAP_SYS_ADMIN)) 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEV_MESSAGE (KERN_DEBUG, device, "%s", 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Quiesce IO on device"); 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device->stopped |= DASD_STOPPED_QUIESCE; 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Quiesce device. 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_resume(struct block_device *bdev, int no, long args) 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable (CAP_SYS_ADMIN)) 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEV_MESSAGE (KERN_DEBUG, device, "%s", 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "resume IO on device"); 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device->stopped &= ~DASD_STOPPED_QUIESCE; 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_schedule_bh (device); 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * performs formatting of _device_ according to _fdata_ 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: The discipline's format_function is assumed to deliver formatting 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * commands to format a single unit of the device. In terms of the ECKD 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * devices this means CCWs are generated to format a single track. 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_format(struct dasd_device * device, struct format_data_t * fdata) 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_ccw_req *cqr; 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device->discipline->format_device == NULL) 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EPERM; 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device->state != DASD_STATE_BASIC) { 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "dasd_format: device is not disabled! "); 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBF_DEV_EVENT(DBF_NOTICE, device, 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "formatting units %d to %d (%d B blocks) flags %d", 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->start_unit, 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->stop_unit, fdata->blksize, fdata->intensity); 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Since dasdfmt keeps the device open after it was disabled, 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * there still exists an inode for this device. 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We must update i_blkbits, otherwise we might get errors when 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * enabling the device later. 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fdata->start_unit == 0) { 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct block_device *bdev = bdget_disk(device->gdp, 0); 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize); 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bdput(bdev); 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (fdata->start_unit <= fdata->stop_unit) { 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cqr = device->discipline->format_device(device, fdata); 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(cqr)) 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return PTR_ERR(cqr); 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = dasd_sleep_on_interruptible(cqr); 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_sfree_request(cqr, cqr->device); 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) { 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != -ERESTARTSYS) 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEV_MESSAGE(KERN_ERR, device, 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds " Formatting of unit %d failed " 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "with rc = %d", 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->start_unit, rc); 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fdata->start_unit++; 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Format device. 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_format(struct block_device *bdev, int no, long args) 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct format_data_t fdata; 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!args) 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* fdata == NULL is no longer a valid arg to dasd_format ! */ 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 319f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 320c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel if (device->features & DASD_FEATURE_READONLY) 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EROFS; 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(&fdata, (void __user *) args, 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct format_data_t))) 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bdev != bdev->bd_contains) { 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Cannot low-level format a partition"); 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return dasd_format(device, &fdata); 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_DASD_PROFILE 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reset device profile information 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_reset_profile(struct block_device *bdev, int no, long args) 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(&device->profile, 0, sizeof (struct dasd_profile_info_t)); 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return device profile information 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_read_profile(struct block_device *bdev, int no, long args) 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3659a7af289660dc749d7c58234191601046a9bf488Horst Hummel if (dasd_profile_level == DASD_PROFILE_OFF) 3669a7af289660dc749d7c58234191601046a9bf488Horst Hummel return -EIO; 3679a7af289660dc749d7c58234191601046a9bf488Horst Hummel 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_to_user((long __user *) args, (long *) &device->profile, 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct dasd_profile_info_t))) 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_reset_profile(struct block_device *bdev, int no, long args) 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOSYS; 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_read_profile(struct block_device *bdev, int no, long args) 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOSYS; 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_information(struct block_device *bdev, int no, long args) 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_information2_t *dasd_info; 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 396c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel int rc; 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ccw_device *cdev; 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!device->discipline->fill_info) 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info = kmalloc(sizeof(struct dasd_information2_t), GFP_KERNEL); 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (dasd_info == NULL) 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = device->discipline->fill_info(device, dasd_info); 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) { 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(dasd_info); 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cdev = device->cdev; 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->devno = _ccw_device_get_device_number(device->cdev); 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->schid = _ccw_device_get_subchannel_number(device->cdev); 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->cu_type = cdev->id.cu_type; 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->cu_model = cdev->id.cu_model; 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->dev_type = cdev->id.dev_type; 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->dev_model = cdev->id.dev_model; 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->status = device->state; 42557467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel /* 42657467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel * The open_count is increased for every opener, that includes 42757467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel * the blkdev_get in dasd_scan_partitions. 42857467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel * This must be hidden from user-space. 42957467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel */ 43057467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel dasd_info->open_count = atomic_read(&device->open_count); 43157467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel if (!device->bdev) 43257467195d1581e354998d5cc35dfd7a12d6e0a24Horst Hummel dasd_info->open_count++; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * check if device is really formatted 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LDL / CDL was returned by 'fill_info' 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((device->state < DASD_STATE_READY) || 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (dasd_check_blocksize(device->bp_block))) 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->format = DASD_FORMAT_NONE; 441f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 442c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel dasd_info->features |= 443c6eb7b7703ac4b3401b74f411c8c51ded214bf19Horst Hummel ((device->features & DASD_FEATURE_READONLY) != 0); 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device->discipline) 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(dasd_info->type, device->discipline->name, 4); 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(dasd_info->type, "none", 4); 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->req_queue_len = 0; 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->chanq_len = 0; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device->request_queue->request_fn) { 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *l; 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DASD_EXTENDED_PROFILING 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *l; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&device->lock, flags); 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each(l, &device->request_queue->queue_head) 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->req_queue_len++; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&device->lock, flags); 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* DASD_EXTENDED_PROFILING */ 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each(l, &device->ccw_queue) 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_info->chanq_len++; 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flags); 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = 0; 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_to_user((long __user *) args, (long *) dasd_info, 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((no == (unsigned int) BIODASDINFO2) ? 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct dasd_information2_t) : 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct dasd_information_t)))) 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EFAULT; 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(dasd_info); 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set read only 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_set_ro(struct block_device *bdev, int no, long args) 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dasd_device *device; 486f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel int intval, rc; 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EACCES; 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bdev != bdev->bd_contains) 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ro setting is not allowed for partitions 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (get_user(intval, (int __user *) args)) 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device = bdev->bd_disk->private_data; 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (device == NULL) 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 498f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_disk_ro(bdev->bd_disk, intval); 500f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel rc = dasd_set_feature(device->cdev, DASD_FEATURE_READONLY, intval); 501f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel 502f24acd4503270ed4c842c8fef0b71105285e0a06Horst Hummel return rc; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * List of static ioctls. 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct { int no; dasd_ioctl_fn_t fn; } dasd_ioctls[] = 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDDISABLE, dasd_ioctl_disable }, 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDENABLE, dasd_ioctl_enable }, 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDQUIESCE, dasd_ioctl_quiesce }, 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDRESUME, dasd_ioctl_resume }, 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDFMT, dasd_ioctl_format }, 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDINFO, dasd_ioctl_information }, 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDINFO2, dasd_ioctl_information }, 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDPRRD, dasd_ioctl_read_profile }, 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BIODASDPRRST, dasd_ioctl_reset_profile }, 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { BLKROSET, dasd_ioctl_set_ro }, 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { DASDAPIVER, dasd_ioctl_api_version }, 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { -1, NULL } 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_init(void) 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; dasd_ioctls[i].no != -1; i++) 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_ioctl_no_register(NULL, dasd_ioctls[i].no, 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_ioctls[i].fn); 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdasd_ioctl_exit(void) 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; dasd_ioctls[i].no != -1; i++) 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_ioctl_no_unregister(NULL, dasd_ioctls[i].no, 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dasd_ioctls[i].fn); 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(dasd_ioctl_no_register); 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(dasd_ioctl_no_unregister); 549