*
* i/o controls for the dasd driver.
*/
-#include <linux/config.h>
#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/blkpg.h>
#include <asm/ccwdev.h>
+#include <asm/cmb.h>
#include <asm/uaccess.h>
/* This is ugly... */
#include "dasd_int.h"
-/*
- * SECTION: ioctl functions.
- */
-static struct list_head dasd_ioctl_list = LIST_HEAD_INIT(dasd_ioctl_list);
-
-/*
- * Find the ioctl with number no.
- */
-static struct dasd_ioctl *
-dasd_find_ioctl(int no)
-{
- struct dasd_ioctl *ioctl;
-
- list_for_each_entry (ioctl, &dasd_ioctl_list, list)
- if (ioctl->no == no)
- return ioctl;
- return NULL;
-}
-
-/*
- * Register ioctl with number no.
- */
-int
-dasd_ioctl_no_register(struct module *owner, int no, dasd_ioctl_fn_t handler)
-{
- struct dasd_ioctl *new;
- if (dasd_find_ioctl(no))
- return -EBUSY;
- new = kmalloc(sizeof (struct dasd_ioctl), GFP_KERNEL);
- if (new == NULL)
- return -ENOMEM;
- new->owner = owner;
- new->no = no;
- new->handler = handler;
- list_add(&new->list, &dasd_ioctl_list);
- return 0;
-}
-
-/*
- * Deregister ioctl with number no.
- */
-int
-dasd_ioctl_no_unregister(struct module *owner, int no, dasd_ioctl_fn_t handler)
-{
- struct dasd_ioctl *old = dasd_find_ioctl(no);
- if (old == NULL)
- return -ENOENT;
- if (old->no != no || old->handler != handler || owner != old->owner)
- return -EINVAL;
- list_del(&old->list);
- kfree(old);
- return 0;
-}
-
-int
-dasd_ioctl(struct inode *inp, struct file *filp,
- unsigned int no, unsigned long data)
-{
- struct block_device *bdev = inp->i_bdev;
- struct dasd_device *device = bdev->bd_disk->private_data;
- struct dasd_ioctl *ioctl;
- const char *dir;
- int rc;
-
- if ((_IOC_DIR(no) != _IOC_NONE) && (data == 0)) {
- PRINT_DEBUG("empty data ptr");
- return -EINVAL;
- }
- dir = _IOC_DIR (no) == _IOC_NONE ? "0" :
- _IOC_DIR (no) == _IOC_READ ? "r" :
- _IOC_DIR (no) == _IOC_WRITE ? "w" :
- _IOC_DIR (no) == (_IOC_READ | _IOC_WRITE) ? "rw" : "u";
- DBF_DEV_EVENT(DBF_DEBUG, device,
- "ioctl 0x%08x %s'0x%x'%d(%d) with data %8lx", no,
- dir, _IOC_TYPE(no), _IOC_NR(no), _IOC_SIZE(no), data);
- /* Search for ioctl no in the ioctl list. */
- list_for_each_entry(ioctl, &dasd_ioctl_list, list) {
- if (ioctl->no == no) {
- /* Found a matching ioctl. Call it. */
- if (!try_module_get(ioctl->owner))
- continue;
- rc = ioctl->handler(bdev, no, data);
- module_put(ioctl->owner);
- return rc;
- }
- }
- /* No ioctl with number no. */
- DBF_DEV_EVENT(DBF_INFO, device,
- "unknown ioctl 0x%08x=%s'0x%x'%d(%d) data %8lx", no,
- dir, _IOC_TYPE(no), _IOC_NR(no), _IOC_SIZE(no), data);
- return -EINVAL;
-}
-
-long
-dasd_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
- int rval;
-
- lock_kernel();
- rval = dasd_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
- unlock_kernel();
-
- return (rval == -EINVAL) ? -ENOIOCTLCMD : rval;
-}
static int
-dasd_ioctl_api_version(struct block_device *bdev, int no, long args)
+dasd_ioctl_api_version(void __user *argp)
{
int ver = DASD_API_VERSION;
- return put_user(ver, (int __user *) args);
+ return put_user(ver, (int __user *)argp);
}
/*
* used by dasdfmt after BIODASDDISABLE to retrigger blocksize detection
*/
static int
-dasd_ioctl_enable(struct block_device *bdev, int no, long args)
+dasd_ioctl_enable(struct block_device *bdev)
{
- struct dasd_device *device;
+ struct dasd_device *device = bdev->bd_disk->private_data;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- device = bdev->bd_disk->private_data;
- if (device == NULL)
- return -ENODEV;
+
dasd_enable_device(device);
/* Formatting the dasd device can change the capacity. */
- down(&bdev->bd_sem);
+ mutex_lock(&bdev->bd_mutex);
i_size_write(bdev->bd_inode, (loff_t)get_capacity(device->gdp) << 9);
- up(&bdev->bd_sem);
+ mutex_unlock(&bdev->bd_mutex);
return 0;
}
* Used by dasdfmt. Disable I/O operations but allow ioctls.
*/
static int
-dasd_ioctl_disable(struct block_device *bdev, int no, long args)
+dasd_ioctl_disable(struct block_device *bdev)
{
- struct dasd_device *device;
+ struct dasd_device *device = bdev->bd_disk->private_data;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- device = bdev->bd_disk->private_data;
- if (device == NULL)
- return -ENODEV;
+
/*
* Man this is sick. We don't do a real disable but only downgrade
* the device to DASD_STATE_BASIC. The reason is that dasdfmt uses
* Set i_size to zero, since read, write, etc. check against this
* value.
*/
- down(&bdev->bd_sem);
+ mutex_lock(&bdev->bd_mutex);
i_size_write(bdev->bd_inode, 0);
- up(&bdev->bd_sem);
+ mutex_unlock(&bdev->bd_mutex);
return 0;
}
* Quiesce device.
*/
static int
-dasd_ioctl_quiesce(struct block_device *bdev, int no, long args)
+dasd_ioctl_quiesce(struct dasd_device *device)
{
- struct dasd_device *device;
unsigned long flags;
-
+
if (!capable (CAP_SYS_ADMIN))
return -EACCES;
-
- device = bdev->bd_disk->private_data;
- if (device == NULL)
- return -ENODEV;
-
+
DEV_MESSAGE (KERN_DEBUG, device, "%s",
"Quiesce IO on device");
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
* Quiesce device.
*/
static int
-dasd_ioctl_resume(struct block_device *bdev, int no, long args)
+dasd_ioctl_resume(struct dasd_device *device)
{
- struct dasd_device *device;
unsigned long flags;
-
- if (!capable (CAP_SYS_ADMIN))
- return -EACCES;
- device = bdev->bd_disk->private_data;
- if (device == NULL)
- return -ENODEV;
+ if (!capable (CAP_SYS_ADMIN))
+ return -EACCES;
DEV_MESSAGE (KERN_DEBUG, device, "%s",
"resume IO on device");
-
+
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
device->stopped &= ~DASD_STOPPED_QUIESCE;
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
* Format device.
*/
static int
-dasd_ioctl_format(struct block_device *bdev, int no, long args)
+dasd_ioctl_format(struct block_device *bdev, void __user *argp)
{
- struct dasd_device *device;
+ struct dasd_device *device = bdev->bd_disk->private_data;
struct format_data_t fdata;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- if (!args)
+ if (!argp)
return -EINVAL;
- /* fdata == NULL is no longer a valid arg to dasd_format ! */
- device = bdev->bd_disk->private_data;
-
- if (device == NULL)
- return -ENODEV;
if (device->features & DASD_FEATURE_READONLY)
return -EROFS;
- if (copy_from_user(&fdata, (void __user *) args,
- sizeof (struct format_data_t)))
+ if (copy_from_user(&fdata, argp, sizeof(struct format_data_t)))
return -EFAULT;
if (bdev != bdev->bd_contains) {
DEV_MESSAGE(KERN_WARNING, device, "%s",
* Reset device profile information
*/
static int
-dasd_ioctl_reset_profile(struct block_device *bdev, int no, long args)
+dasd_ioctl_reset_profile(struct dasd_device *device)
{
- struct dasd_device *device;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
-
- device = bdev->bd_disk->private_data;
- if (device == NULL)
- return -ENODEV;
-
memset(&device->profile, 0, sizeof (struct dasd_profile_info_t));
return 0;
}
* Return device profile information
*/
static int
-dasd_ioctl_read_profile(struct block_device *bdev, int no, long args)
+dasd_ioctl_read_profile(struct dasd_device *device, void __user *argp)
{
- struct dasd_device *device;
-
- device = bdev->bd_disk->private_data;
- if (device == NULL)
- return -ENODEV;
-
if (dasd_profile_level == DASD_PROFILE_OFF)
return -EIO;
-
- if (copy_to_user((long __user *) args, (long *) &device->profile,
+ if (copy_to_user(argp, &device->profile,
sizeof (struct dasd_profile_info_t)))
return -EFAULT;
return 0;
}
#else
static int
-dasd_ioctl_reset_profile(struct block_device *bdev, int no, long args)
+dasd_ioctl_reset_profile(struct dasd_device *device)
{
return -ENOSYS;
}
static int
-dasd_ioctl_read_profile(struct block_device *bdev, int no, long args)
+dasd_ioctl_read_profile(struct dasd_device *device, void __user *argp)
{
return -ENOSYS;
}
* Return dasd information. Used for BIODASDINFO and BIODASDINFO2.
*/
static int
-dasd_ioctl_information(struct block_device *bdev, int no, long args)
+dasd_ioctl_information(struct dasd_device *device,
+ unsigned int cmd, void __user *argp)
{
- struct dasd_device *device;
struct dasd_information2_t *dasd_info;
unsigned long flags;
int rc;
struct ccw_device *cdev;
- device = bdev->bd_disk->private_data;
- if (device == NULL)
- return -ENODEV;
-
if (!device->discipline->fill_info)
return -EINVAL;
- dasd_info = kmalloc(sizeof(struct dasd_information2_t), GFP_KERNEL);
+ dasd_info = kzalloc(sizeof(struct dasd_information2_t), GFP_KERNEL);
if (dasd_info == NULL)
return -ENOMEM;
dasd_info->open_count = atomic_read(&device->open_count);
if (!device->bdev)
dasd_info->open_count++;
-
+
/*
* check if device is really formatted
* LDL / CDL was returned by 'fill_info'
memcpy(dasd_info->type, device->discipline->name, 4);
else
memcpy(dasd_info->type, "none", 4);
- dasd_info->req_queue_len = 0;
- dasd_info->chanq_len = 0;
+
if (device->request_queue->request_fn) {
struct list_head *l;
#ifdef DASD_EXTENDED_PROFILING
}
rc = 0;
- if (copy_to_user((long __user *) args, (long *) dasd_info,
- ((no == (unsigned int) BIODASDINFO2) ?
+ if (copy_to_user(argp, dasd_info,
+ ((cmd == (unsigned int) BIODASDINFO2) ?
sizeof (struct dasd_information2_t) :
sizeof (struct dasd_information_t))))
rc = -EFAULT;
* Set read only
*/
static int
-dasd_ioctl_set_ro(struct block_device *bdev, int no, long args)
+dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp)
{
- struct dasd_device *device;
- int intval, rc;
+ struct dasd_device *device = bdev->bd_disk->private_data;
+ int intval;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (bdev != bdev->bd_contains)
// ro setting is not allowed for partitions
return -EINVAL;
- if (get_user(intval, (int __user *) args))
+ if (get_user(intval, (int __user *)argp))
return -EFAULT;
- device = bdev->bd_disk->private_data;
- if (device == NULL)
- return -ENODEV;
set_disk_ro(bdev->bd_disk, intval);
- rc = dasd_set_feature(device->cdev, DASD_FEATURE_READONLY, intval);
-
- return rc;
+ return dasd_set_feature(device->cdev, DASD_FEATURE_READONLY, intval);
}
-/*
- * List of static ioctls.
- */
-static struct { int no; dasd_ioctl_fn_t fn; } dasd_ioctls[] =
+static int
+dasd_ioctl_readall_cmb(struct dasd_device *device, unsigned int cmd,
+ unsigned long arg)
{
- { BIODASDDISABLE, dasd_ioctl_disable },
- { BIODASDENABLE, dasd_ioctl_enable },
- { BIODASDQUIESCE, dasd_ioctl_quiesce },
- { BIODASDRESUME, dasd_ioctl_resume },
- { BIODASDFMT, dasd_ioctl_format },
- { BIODASDINFO, dasd_ioctl_information },
- { BIODASDINFO2, dasd_ioctl_information },
- { BIODASDPRRD, dasd_ioctl_read_profile },
- { BIODASDPRRST, dasd_ioctl_reset_profile },
- { BLKROSET, dasd_ioctl_set_ro },
- { DASDAPIVER, dasd_ioctl_api_version },
- { -1, NULL }
-};
+ struct cmbdata __user *argp = (void __user *) arg;
+ size_t size = _IOC_SIZE(cmd);
+ struct cmbdata data;
+ int ret;
+
+ ret = cmf_readall(device->cdev, &data);
+ if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp))))
+ return -EFAULT;
+ return ret;
+}
int
-dasd_ioctl_init(void)
+dasd_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
{
- int i;
+ struct block_device *bdev = inode->i_bdev;
+ struct dasd_device *device = bdev->bd_disk->private_data;
+ void __user *argp = (void __user *)arg;
- for (i = 0; dasd_ioctls[i].no != -1; i++)
- dasd_ioctl_no_register(NULL, dasd_ioctls[i].no,
- dasd_ioctls[i].fn);
- return 0;
+ if (!device)
+ return -ENODEV;
+
+ if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) {
+ PRINT_DEBUG("empty data ptr");
+ return -EINVAL;
+ }
+
+ switch (cmd) {
+ case BIODASDDISABLE:
+ return dasd_ioctl_disable(bdev);
+ case BIODASDENABLE:
+ return dasd_ioctl_enable(bdev);
+ case BIODASDQUIESCE:
+ return dasd_ioctl_quiesce(device);
+ case BIODASDRESUME:
+ return dasd_ioctl_resume(device);
+ case BIODASDFMT:
+ return dasd_ioctl_format(bdev, argp);
+ case BIODASDINFO:
+ return dasd_ioctl_information(device, cmd, argp);
+ case BIODASDINFO2:
+ return dasd_ioctl_information(device, cmd, argp);
+ case BIODASDPRRD:
+ return dasd_ioctl_read_profile(device, argp);
+ case BIODASDPRRST:
+ return dasd_ioctl_reset_profile(device);
+ case BLKROSET:
+ return dasd_ioctl_set_ro(bdev, argp);
+ case DASDAPIVER:
+ return dasd_ioctl_api_version(argp);
+ case BIODASDCMFENABLE:
+ return enable_cmf(device->cdev);
+ case BIODASDCMFDISABLE:
+ return disable_cmf(device->cdev);
+ case BIODASDREADALLCMB:
+ return dasd_ioctl_readall_cmb(device, cmd, arg);
+ default:
+ /* if the discipline has an ioctl method try it. */
+ if (device->discipline->ioctl) {
+ int rval = device->discipline->ioctl(device, cmd, argp);
+ if (rval != -ENOIOCTLCMD)
+ return rval;
+ }
+ return -EINVAL;
+ }
}
-void
-dasd_ioctl_exit(void)
+long
+dasd_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
- int i;
+ int rval;
- for (i = 0; dasd_ioctls[i].no != -1; i++)
- dasd_ioctl_no_unregister(NULL, dasd_ioctls[i].no,
- dasd_ioctls[i].fn);
+ lock_kernel();
+ rval = dasd_ioctl(filp->f_path.dentry->d_inode, filp, cmd, arg);
+ unlock_kernel();
+ return (rval == -EINVAL) ? -ENOIOCTLCMD : rval;
}
-
-EXPORT_SYMBOL(dasd_ioctl_no_register);
-EXPORT_SYMBOL(dasd_ioctl_no_unregister);
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