2005-04-16 16:20:36 -06:00
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/*
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* File...........: linux/drivers/s390/block/dasd_ioctl.c
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* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
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* Horst Hummel <Horst.Hummel@de.ibm.com>
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* Carsten Otte <Cotte@de.ibm.com>
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Bugreports.to..: <Linux390@de.ibm.com>
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* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999-2001
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*
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* i/o controls for the dasd driver.
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*/
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/fs.h>
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#include <linux/blkpg.h>
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#include <asm/ccwdev.h>
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2006-03-24 04:15:21 -07:00
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#include <asm/cmb.h>
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2005-04-16 16:20:36 -06:00
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#include <asm/uaccess.h>
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/* This is ugly... */
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#define PRINTK_HEADER "dasd_ioctl:"
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#include "dasd_int.h"
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static int
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2006-03-24 04:15:19 -07:00
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dasd_ioctl_api_version(void __user *argp)
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2005-04-16 16:20:36 -06:00
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{
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int ver = DASD_API_VERSION;
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2006-03-24 04:15:32 -07:00
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return put_user(ver, (int __user *)argp);
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2005-04-16 16:20:36 -06:00
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}
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/*
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* Enable device.
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* used by dasdfmt after BIODASDDISABLE to retrigger blocksize detection
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*/
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static int
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2006-03-24 04:15:19 -07:00
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dasd_ioctl_enable(struct block_device *bdev)
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2005-04-16 16:20:36 -06:00
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{
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2008-01-26 06:11:23 -07:00
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struct dasd_block *block = bdev->bd_disk->private_data;
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2005-04-16 16:20:36 -06:00
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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2006-03-24 04:15:19 -07:00
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2008-01-26 06:11:23 -07:00
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dasd_enable_device(block->base);
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2005-04-16 16:20:36 -06:00
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/* Formatting the dasd device can change the capacity. */
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2006-03-23 04:00:28 -07:00
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mutex_lock(&bdev->bd_mutex);
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2008-01-26 06:11:23 -07:00
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i_size_write(bdev->bd_inode, (loff_t)get_capacity(block->gdp) << 9);
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2006-03-23 04:00:28 -07:00
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mutex_unlock(&bdev->bd_mutex);
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2005-04-16 16:20:36 -06:00
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return 0;
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}
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/*
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* Disable device.
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* Used by dasdfmt. Disable I/O operations but allow ioctls.
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*/
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static int
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2006-03-24 04:15:19 -07:00
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dasd_ioctl_disable(struct block_device *bdev)
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2005-04-16 16:20:36 -06:00
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{
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2008-01-26 06:11:23 -07:00
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struct dasd_block *block = bdev->bd_disk->private_data;
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2005-04-16 16:20:36 -06:00
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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2006-03-24 04:15:19 -07:00
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2005-04-16 16:20:36 -06:00
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/*
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* Man this is sick. We don't do a real disable but only downgrade
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* the device to DASD_STATE_BASIC. The reason is that dasdfmt uses
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* BIODASDDISABLE to disable accesses to the device via the block
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* device layer but it still wants to do i/o on the device by
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* using the BIODASDFMT ioctl. Therefore the correct state for the
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* device is DASD_STATE_BASIC that allows to do basic i/o.
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*/
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2008-01-26 06:11:23 -07:00
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dasd_set_target_state(block->base, DASD_STATE_BASIC);
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2005-04-16 16:20:36 -06:00
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/*
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* Set i_size to zero, since read, write, etc. check against this
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* value.
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*/
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2006-03-23 04:00:28 -07:00
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mutex_lock(&bdev->bd_mutex);
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2005-04-16 16:20:36 -06:00
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i_size_write(bdev->bd_inode, 0);
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2006-03-23 04:00:28 -07:00
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mutex_unlock(&bdev->bd_mutex);
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2005-04-16 16:20:36 -06:00
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return 0;
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}
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/*
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* Quiesce device.
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*/
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2008-01-26 06:11:23 -07:00
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static int dasd_ioctl_quiesce(struct dasd_block *block)
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2005-04-16 16:20:36 -06:00
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{
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unsigned long flags;
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2008-01-26 06:11:23 -07:00
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struct dasd_device *base;
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2006-06-29 06:58:12 -06:00
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2008-01-26 06:11:23 -07:00
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base = block->base;
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2005-04-16 16:20:36 -06:00
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if (!capable (CAP_SYS_ADMIN))
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return -EACCES;
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2006-06-29 06:58:12 -06:00
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2008-01-26 06:11:23 -07:00
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DEV_MESSAGE(KERN_DEBUG, base, "%s", "Quiesce IO on device");
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spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags);
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base->stopped |= DASD_STOPPED_QUIESCE;
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spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags);
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2005-04-16 16:20:36 -06:00
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return 0;
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}
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/*
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* Quiesce device.
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*/
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2008-01-26 06:11:23 -07:00
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static int dasd_ioctl_resume(struct dasd_block *block)
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2005-04-16 16:20:36 -06:00
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{
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unsigned long flags;
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2008-01-26 06:11:23 -07:00
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struct dasd_device *base;
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2006-06-29 06:58:12 -06:00
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2008-01-26 06:11:23 -07:00
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base = block->base;
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2006-06-29 06:58:12 -06:00
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if (!capable (CAP_SYS_ADMIN))
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2005-04-16 16:20:36 -06:00
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return -EACCES;
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2008-01-26 06:11:23 -07:00
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DEV_MESSAGE(KERN_DEBUG, base, "%s", "resume IO on device");
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spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags);
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base->stopped &= ~DASD_STOPPED_QUIESCE;
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spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags);
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2005-04-16 16:20:36 -06:00
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2008-01-26 06:11:23 -07:00
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dasd_schedule_block_bh(block);
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2005-04-16 16:20:36 -06:00
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return 0;
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}
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/*
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* performs formatting of _device_ according to _fdata_
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* Note: The discipline's format_function is assumed to deliver formatting
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* commands to format a single unit of the device. In terms of the ECKD
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* devices this means CCWs are generated to format a single track.
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*/
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2008-01-26 06:11:23 -07:00
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static int dasd_format(struct dasd_block *block, struct format_data_t *fdata)
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2005-04-16 16:20:36 -06:00
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{
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struct dasd_ccw_req *cqr;
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2008-01-26 06:11:23 -07:00
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struct dasd_device *base;
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2005-04-16 16:20:36 -06:00
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int rc;
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2008-01-26 06:11:23 -07:00
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base = block->base;
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if (base->discipline->format_device == NULL)
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2005-04-16 16:20:36 -06:00
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return -EPERM;
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2008-01-26 06:11:23 -07:00
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if (base->state != DASD_STATE_BASIC) {
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DEV_MESSAGE(KERN_WARNING, base, "%s",
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2005-04-16 16:20:36 -06:00
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"dasd_format: device is not disabled! ");
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return -EBUSY;
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}
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2008-01-26 06:11:23 -07:00
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DBF_DEV_EVENT(DBF_NOTICE, base,
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2005-04-16 16:20:36 -06:00
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"formatting units %d to %d (%d B blocks) flags %d",
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fdata->start_unit,
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fdata->stop_unit, fdata->blksize, fdata->intensity);
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/* Since dasdfmt keeps the device open after it was disabled,
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* there still exists an inode for this device.
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* We must update i_blkbits, otherwise we might get errors when
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* enabling the device later.
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*/
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if (fdata->start_unit == 0) {
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2008-01-26 06:11:23 -07:00
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struct block_device *bdev = bdget_disk(block->gdp, 0);
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2005-04-16 16:20:36 -06:00
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bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize);
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bdput(bdev);
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}
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while (fdata->start_unit <= fdata->stop_unit) {
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2008-01-26 06:11:23 -07:00
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cqr = base->discipline->format_device(base, fdata);
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2005-04-16 16:20:36 -06:00
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if (IS_ERR(cqr))
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return PTR_ERR(cqr);
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rc = dasd_sleep_on_interruptible(cqr);
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2008-01-26 06:11:23 -07:00
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dasd_sfree_request(cqr, cqr->memdev);
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2005-04-16 16:20:36 -06:00
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if (rc) {
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if (rc != -ERESTARTSYS)
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2008-01-26 06:11:23 -07:00
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DEV_MESSAGE(KERN_ERR, base,
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2005-04-16 16:20:36 -06:00
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" Formatting of unit %d failed "
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"with rc = %d",
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fdata->start_unit, rc);
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return rc;
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}
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fdata->start_unit++;
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}
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return 0;
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}
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/*
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* Format device.
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*/
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static int
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2006-03-24 04:15:19 -07:00
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dasd_ioctl_format(struct block_device *bdev, void __user *argp)
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2005-04-16 16:20:36 -06:00
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{
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2008-01-26 06:11:23 -07:00
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struct dasd_block *block = bdev->bd_disk->private_data;
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2005-04-16 16:20:36 -06:00
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struct format_data_t fdata;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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2006-03-24 04:15:19 -07:00
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if (!argp)
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2005-04-16 16:20:36 -06:00
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return -EINVAL;
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2005-05-01 09:58:59 -06:00
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2008-01-26 06:11:23 -07:00
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if (block->base->features & DASD_FEATURE_READONLY)
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2005-04-16 16:20:36 -06:00
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return -EROFS;
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2006-03-24 04:15:19 -07:00
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if (copy_from_user(&fdata, argp, sizeof(struct format_data_t)))
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2005-04-16 16:20:36 -06:00
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return -EFAULT;
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if (bdev != bdev->bd_contains) {
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2008-01-26 06:11:23 -07:00
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DEV_MESSAGE(KERN_WARNING, block->base, "%s",
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2005-04-16 16:20:36 -06:00
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"Cannot low-level format a partition");
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return -EINVAL;
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}
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2008-01-26 06:11:23 -07:00
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return dasd_format(block, &fdata);
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2005-04-16 16:20:36 -06:00
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}
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#ifdef CONFIG_DASD_PROFILE
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/*
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* Reset device profile information
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*/
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2008-01-26 06:11:23 -07:00
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static int dasd_ioctl_reset_profile(struct dasd_block *block)
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2005-04-16 16:20:36 -06:00
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{
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2008-01-26 06:11:23 -07:00
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memset(&block->profile, 0, sizeof(struct dasd_profile_info_t));
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2005-04-16 16:20:36 -06:00
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return 0;
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}
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/*
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* Return device profile information
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*/
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2008-01-26 06:11:23 -07:00
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static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp)
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2005-04-16 16:20:36 -06:00
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{
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2006-01-06 01:19:14 -07:00
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if (dasd_profile_level == DASD_PROFILE_OFF)
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return -EIO;
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2008-01-26 06:11:23 -07:00
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if (copy_to_user(argp, &block->profile,
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sizeof(struct dasd_profile_info_t)))
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2005-04-16 16:20:36 -06:00
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return -EFAULT;
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return 0;
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}
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#else
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2008-01-26 06:11:23 -07:00
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static int dasd_ioctl_reset_profile(struct dasd_block *block)
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2005-04-16 16:20:36 -06:00
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{
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return -ENOSYS;
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}
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2008-01-26 06:11:23 -07:00
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static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp)
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2005-04-16 16:20:36 -06:00
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{
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return -ENOSYS;
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}
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#endif
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/*
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* Return dasd information. Used for BIODASDINFO and BIODASDINFO2.
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*/
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2008-01-26 06:11:23 -07:00
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static int dasd_ioctl_information(struct dasd_block *block,
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unsigned int cmd, void __user *argp)
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2005-04-16 16:20:36 -06:00
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{
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struct dasd_information2_t *dasd_info;
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unsigned long flags;
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2005-09-03 16:57:58 -06:00
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int rc;
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2008-01-26 06:11:23 -07:00
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struct dasd_device *base;
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2005-04-16 16:20:36 -06:00
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struct ccw_device *cdev;
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2007-05-10 07:45:42 -06:00
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struct ccw_dev_id dev_id;
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2005-04-16 16:20:36 -06:00
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2008-01-26 06:11:23 -07:00
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base = block->base;
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if (!base->discipline->fill_info)
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2005-04-16 16:20:36 -06:00
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return -EINVAL;
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2006-03-24 04:15:24 -07:00
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dasd_info = kzalloc(sizeof(struct dasd_information2_t), GFP_KERNEL);
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2005-04-16 16:20:36 -06:00
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if (dasd_info == NULL)
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return -ENOMEM;
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2008-01-26 06:11:23 -07:00
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rc = base->discipline->fill_info(base, dasd_info);
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2005-04-16 16:20:36 -06:00
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if (rc) {
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kfree(dasd_info);
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return rc;
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}
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2008-01-26 06:11:23 -07:00
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cdev = base->cdev;
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2007-05-10 07:45:42 -06:00
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ccw_device_get_id(cdev, &dev_id);
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2005-04-16 16:20:36 -06:00
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2007-05-10 07:45:42 -06:00
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dasd_info->devno = dev_id.devno;
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2008-01-26 06:11:23 -07:00
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dasd_info->schid = _ccw_device_get_subchannel_number(base->cdev);
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2005-04-16 16:20:36 -06:00
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dasd_info->cu_type = cdev->id.cu_type;
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dasd_info->cu_model = cdev->id.cu_model;
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dasd_info->dev_type = cdev->id.dev_type;
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dasd_info->dev_model = cdev->id.dev_model;
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2008-01-26 06:11:23 -07:00
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dasd_info->status = base->state;
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2006-02-01 04:06:36 -07:00
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/*
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* The open_count is increased for every opener, that includes
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* the blkdev_get in dasd_scan_partitions.
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* This must be hidden from user-space.
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*/
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2008-01-26 06:11:23 -07:00
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dasd_info->open_count = atomic_read(&block->open_count);
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|
|
if (!block->bdev)
|
2006-02-01 04:06:36 -07:00
|
|
|
dasd_info->open_count++;
|
2006-06-29 06:58:12 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* check if device is really formatted
|
|
|
|
* LDL / CDL was returned by 'fill_info'
|
|
|
|
*/
|
2008-01-26 06:11:23 -07:00
|
|
|
if ((base->state < DASD_STATE_READY) ||
|
|
|
|
(dasd_check_blocksize(block->bp_block)))
|
2005-04-16 16:20:36 -06:00
|
|
|
dasd_info->format = DASD_FORMAT_NONE;
|
2005-05-01 09:58:59 -06:00
|
|
|
|
2005-09-03 16:57:58 -06:00
|
|
|
dasd_info->features |=
|
2008-01-26 06:11:23 -07:00
|
|
|
((base->features & DASD_FEATURE_READONLY) != 0);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2008-01-26 06:11:23 -07:00
|
|
|
if (base->discipline)
|
|
|
|
memcpy(dasd_info->type, base->discipline->name, 4);
|
2005-04-16 16:20:36 -06:00
|
|
|
else
|
|
|
|
memcpy(dasd_info->type, "none", 4);
|
2006-03-24 04:15:24 -07:00
|
|
|
|
2008-01-26 06:11:23 -07:00
|
|
|
if (block->request_queue->request_fn) {
|
2005-04-16 16:20:36 -06:00
|
|
|
struct list_head *l;
|
|
|
|
#ifdef DASD_EXTENDED_PROFILING
|
|
|
|
{
|
|
|
|
struct list_head *l;
|
2008-01-26 06:11:23 -07:00
|
|
|
spin_lock_irqsave(&block->lock, flags);
|
|
|
|
list_for_each(l, &block->request_queue->queue_head)
|
2005-04-16 16:20:36 -06:00
|
|
|
dasd_info->req_queue_len++;
|
2008-01-26 06:11:23 -07:00
|
|
|
spin_unlock_irqrestore(&block->lock, flags);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
#endif /* DASD_EXTENDED_PROFILING */
|
2008-01-26 06:11:23 -07:00
|
|
|
spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags);
|
|
|
|
list_for_each(l, &base->ccw_queue)
|
2005-04-16 16:20:36 -06:00
|
|
|
dasd_info->chanq_len++;
|
2008-01-26 06:11:23 -07:00
|
|
|
spin_unlock_irqrestore(get_ccwdev_lock(base->cdev),
|
2005-04-16 16:20:36 -06:00
|
|
|
flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
rc = 0;
|
2006-03-24 04:15:19 -07:00
|
|
|
if (copy_to_user(argp, dasd_info,
|
|
|
|
((cmd == (unsigned int) BIODASDINFO2) ?
|
2008-01-26 06:11:23 -07:00
|
|
|
sizeof(struct dasd_information2_t) :
|
|
|
|
sizeof(struct dasd_information_t))))
|
2005-04-16 16:20:36 -06:00
|
|
|
rc = -EFAULT;
|
|
|
|
kfree(dasd_info);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Set read only
|
|
|
|
*/
|
|
|
|
static int
|
2006-03-24 04:15:19 -07:00
|
|
|
dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2008-01-26 06:11:23 -07:00
|
|
|
struct dasd_block *block = bdev->bd_disk->private_data;
|
2006-03-24 04:15:19 -07:00
|
|
|
int intval;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
|
|
return -EACCES;
|
|
|
|
if (bdev != bdev->bd_contains)
|
|
|
|
// ro setting is not allowed for partitions
|
|
|
|
return -EINVAL;
|
2006-07-12 08:41:55 -06:00
|
|
|
if (get_user(intval, (int __user *)argp))
|
2005-04-16 16:20:36 -06:00
|
|
|
return -EFAULT;
|
2005-05-01 09:58:59 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
set_disk_ro(bdev->bd_disk, intval);
|
2008-01-26 06:11:23 -07:00
|
|
|
return dasd_set_feature(block->base->cdev, DASD_FEATURE_READONLY, intval);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2008-01-26 06:11:23 -07:00
|
|
|
static int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd,
|
2006-03-24 04:15:21 -07:00
|
|
|
unsigned long arg)
|
|
|
|
{
|
|
|
|
struct cmbdata __user *argp = (void __user *) arg;
|
|
|
|
size_t size = _IOC_SIZE(cmd);
|
|
|
|
struct cmbdata data;
|
|
|
|
int ret;
|
|
|
|
|
2008-01-26 06:11:23 -07:00
|
|
|
ret = cmf_readall(block->base->cdev, &data);
|
2006-03-24 04:15:21 -07:00
|
|
|
if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp))))
|
|
|
|
return -EFAULT;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2009-03-26 08:23:45 -06:00
|
|
|
static int
|
|
|
|
dasd_do_ioctl(struct block_device *bdev, fmode_t mode,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2008-01-26 06:11:23 -07:00
|
|
|
struct dasd_block *block = bdev->bd_disk->private_data;
|
2006-03-24 04:15:19 -07:00
|
|
|
void __user *argp = (void __user *)arg;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2008-01-26 06:11:23 -07:00
|
|
|
if (!block)
|
2006-03-24 04:15:19 -07:00
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) {
|
|
|
|
PRINT_DEBUG("empty data ptr");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-03-24 04:15:19 -07:00
|
|
|
switch (cmd) {
|
|
|
|
case BIODASDDISABLE:
|
|
|
|
return dasd_ioctl_disable(bdev);
|
|
|
|
case BIODASDENABLE:
|
|
|
|
return dasd_ioctl_enable(bdev);
|
|
|
|
case BIODASDQUIESCE:
|
2008-01-26 06:11:23 -07:00
|
|
|
return dasd_ioctl_quiesce(block);
|
2006-03-24 04:15:19 -07:00
|
|
|
case BIODASDRESUME:
|
2008-01-26 06:11:23 -07:00
|
|
|
return dasd_ioctl_resume(block);
|
2006-03-24 04:15:19 -07:00
|
|
|
case BIODASDFMT:
|
|
|
|
return dasd_ioctl_format(bdev, argp);
|
|
|
|
case BIODASDINFO:
|
2008-01-26 06:11:23 -07:00
|
|
|
return dasd_ioctl_information(block, cmd, argp);
|
2006-03-24 04:15:19 -07:00
|
|
|
case BIODASDINFO2:
|
2008-01-26 06:11:23 -07:00
|
|
|
return dasd_ioctl_information(block, cmd, argp);
|
2006-03-24 04:15:19 -07:00
|
|
|
case BIODASDPRRD:
|
2008-01-26 06:11:23 -07:00
|
|
|
return dasd_ioctl_read_profile(block, argp);
|
2006-03-24 04:15:19 -07:00
|
|
|
case BIODASDPRRST:
|
2008-01-26 06:11:23 -07:00
|
|
|
return dasd_ioctl_reset_profile(block);
|
2006-03-24 04:15:19 -07:00
|
|
|
case BLKROSET:
|
|
|
|
return dasd_ioctl_set_ro(bdev, argp);
|
|
|
|
case DASDAPIVER:
|
|
|
|
return dasd_ioctl_api_version(argp);
|
2006-03-24 04:15:21 -07:00
|
|
|
case BIODASDCMFENABLE:
|
2008-01-26 06:11:23 -07:00
|
|
|
return enable_cmf(block->base->cdev);
|
2006-03-24 04:15:21 -07:00
|
|
|
case BIODASDCMFDISABLE:
|
2008-01-26 06:11:23 -07:00
|
|
|
return disable_cmf(block->base->cdev);
|
2006-03-24 04:15:21 -07:00
|
|
|
case BIODASDREADALLCMB:
|
2008-01-26 06:11:23 -07:00
|
|
|
return dasd_ioctl_readall_cmb(block, cmd, arg);
|
2006-03-24 04:15:19 -07:00
|
|
|
default:
|
2006-03-24 04:15:20 -07:00
|
|
|
/* if the discipline has an ioctl method try it. */
|
2008-01-26 06:11:23 -07:00
|
|
|
if (block->base->discipline->ioctl) {
|
|
|
|
int rval = block->base->discipline->ioctl(block, cmd, argp);
|
2006-03-24 04:15:20 -07:00
|
|
|
if (rval != -ENOIOCTLCMD)
|
|
|
|
return rval;
|
|
|
|
}
|
|
|
|
|
2006-03-24 04:15:19 -07:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2009-03-26 08:23:45 -06:00
|
|
|
|
|
|
|
int dasd_ioctl(struct block_device *bdev, fmode_t mode,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
lock_kernel();
|
|
|
|
rc = dasd_do_ioctl(bdev, mode, cmd, arg);
|
|
|
|
unlock_kernel();
|
|
|
|
return rc;
|
|
|
|
}
|