#include <linux/init.h>
#include <linux/fs.h>
-#include <linux/devfs_fs_kernel.h>
#include <linux/major.h>
#include <linux/blkdev.h>
#include <linux/module.h>
#include <linux/uio.h>
#include <linux/cdev.h>
#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/smp_lock.h>
+#include <linux/gfp.h>
#include <asm/uaccess.h>
static struct class *raw_class;
static struct raw_device_data raw_devices[MAX_RAW_MINORS];
-static DECLARE_MUTEX(raw_mutex);
-static struct file_operations raw_ctl_fops; /* forward declaration */
+static DEFINE_MUTEX(raw_mutex);
+static const struct file_operations raw_ctl_fops; /* forward declaration */
/*
* Open/close code for raw IO.
return 0;
}
- down(&raw_mutex);
+ lock_kernel();
+ mutex_lock(&raw_mutex);
/*
* All we need to do on open is check that the device is bound.
if (!bdev)
goto out;
igrab(bdev->bd_inode);
- err = blkdev_get(bdev, filp->f_mode, 0);
+ err = blkdev_get(bdev, filp->f_mode);
if (err)
goto out;
err = bd_claim(bdev, raw_open);
if (err)
goto out1;
- err = set_blocksize(bdev, bdev_hardsect_size(bdev));
+ err = set_blocksize(bdev, bdev_logical_block_size(bdev));
if (err)
goto out2;
filp->f_flags |= O_DIRECT;
filp->f_mapping = bdev->bd_inode->i_mapping;
if (++raw_devices[minor].inuse == 1)
- filp->f_dentry->d_inode->i_mapping =
+ filp->f_path.dentry->d_inode->i_mapping =
bdev->bd_inode->i_mapping;
filp->private_data = bdev;
- up(&raw_mutex);
+ mutex_unlock(&raw_mutex);
+ unlock_kernel();
return 0;
out2:
bd_release(bdev);
out1:
- blkdev_put(bdev);
+ blkdev_put(bdev, filp->f_mode);
out:
- up(&raw_mutex);
+ mutex_unlock(&raw_mutex);
+ unlock_kernel();
return err;
}
const int minor= iminor(inode);
struct block_device *bdev;
- down(&raw_mutex);
+ mutex_lock(&raw_mutex);
bdev = raw_devices[minor].binding;
if (--raw_devices[minor].inuse == 0) {
/* Here inode->i_mapping == bdev->bd_inode->i_mapping */
inode->i_mapping = &inode->i_data;
inode->i_mapping->backing_dev_info = &default_backing_dev_info;
}
- up(&raw_mutex);
+ mutex_unlock(&raw_mutex);
bd_release(bdev);
- blkdev_put(bdev);
+ blkdev_put(bdev, filp->f_mode);
return 0;
}
/*
* Forward ioctls to the underlying block device.
*/
-static int
-raw_ioctl(struct inode *inode, struct file *filp,
- unsigned int command, unsigned long arg)
+static long
+raw_ioctl(struct file *filp, unsigned int command, unsigned long arg)
{
struct block_device *bdev = filp->private_data;
+ int ret;
- return blkdev_ioctl(bdev->bd_inode, NULL, command, arg);
+ lock_kernel();
+ ret = blkdev_ioctl(bdev, 0, command, arg);
+ unlock_kernel();
+
+ return ret;
}
static void bind_device(struct raw_config_request *rq)
{
- class_device_destroy(raw_class, MKDEV(RAW_MAJOR, rq->raw_minor));
- class_device_create(raw_class, MKDEV(RAW_MAJOR, rq->raw_minor),
- NULL, "raw%d", rq->raw_minor);
+ device_destroy(raw_class, MKDEV(RAW_MAJOR, rq->raw_minor));
+ device_create(raw_class, NULL, MKDEV(RAW_MAJOR, rq->raw_minor), NULL,
+ "raw%d", rq->raw_minor);
}
/*
* Deal with ioctls against the raw-device control interface, to bind
* and unbind other raw devices.
*/
-static int raw_ctl_ioctl(struct inode *inode, struct file *filp,
- unsigned int command, unsigned long arg)
+static long raw_ctl_ioctl(struct file *filp, unsigned int command,
+ unsigned long arg)
{
struct raw_config_request rq;
struct raw_device_data *rawdev;
int err = 0;
+ lock_kernel();
switch (command) {
case RAW_SETBIND:
case RAW_GETBIND:
goto out;
}
- if (rq.raw_minor < 0 || rq.raw_minor >= MAX_RAW_MINORS) {
+ if (rq.raw_minor <= 0 || rq.raw_minor >= MAX_RAW_MINORS) {
err = -EINVAL;
goto out;
}
goto out;
}
- down(&raw_mutex);
+ mutex_lock(&raw_mutex);
if (rawdev->inuse) {
- up(&raw_mutex);
+ mutex_unlock(&raw_mutex);
err = -EBUSY;
goto out;
}
if (rq.block_major == 0 && rq.block_minor == 0) {
/* unbind */
rawdev->binding = NULL;
- class_device_destroy(raw_class,
+ device_destroy(raw_class,
MKDEV(RAW_MAJOR, rq.raw_minor));
} else {
rawdev->binding = bdget(dev);
bind_device(&rq);
}
}
- up(&raw_mutex);
+ mutex_unlock(&raw_mutex);
} else {
struct block_device *bdev;
- down(&raw_mutex);
+ mutex_lock(&raw_mutex);
bdev = rawdev->binding;
if (bdev) {
rq.block_major = MAJOR(bdev->bd_dev);
} else {
rq.block_major = rq.block_minor = 0;
}
- up(&raw_mutex);
+ mutex_unlock(&raw_mutex);
if (copy_to_user((void __user *)arg, &rq, sizeof(rq))) {
err = -EFAULT;
goto out;
break;
}
out:
+ unlock_kernel();
return err;
}
-static ssize_t raw_file_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct iovec local_iov = {
- .iov_base = (char __user *)buf,
- .iov_len = count
- };
-
- return generic_file_write_nolock(file, &local_iov, 1, ppos);
-}
-
-static ssize_t raw_file_aio_write(struct kiocb *iocb, const char __user *buf,
- size_t count, loff_t pos)
-{
- struct iovec local_iov = {
- .iov_base = (char __user *)buf,
- .iov_len = count
- };
-
- return generic_file_aio_write_nolock(iocb, &local_iov, 1, &iocb->ki_pos);
-}
-
-
-static struct file_operations raw_fops = {
- .read = generic_file_read,
- .aio_read = generic_file_aio_read,
- .write = raw_file_write,
- .aio_write = raw_file_aio_write,
- .open = raw_open,
- .release= raw_release,
- .ioctl = raw_ioctl,
- .readv = generic_file_readv,
- .writev = generic_file_writev,
- .owner = THIS_MODULE,
+static const struct file_operations raw_fops = {
+ .read = do_sync_read,
+ .aio_read = generic_file_aio_read,
+ .write = do_sync_write,
+ .aio_write = blkdev_aio_write,
+ .fsync = blkdev_fsync,
+ .open = raw_open,
+ .release = raw_release,
+ .unlocked_ioctl = raw_ioctl,
+ .owner = THIS_MODULE,
};
-static struct file_operations raw_ctl_fops = {
- .ioctl = raw_ctl_ioctl,
- .open = raw_open,
- .owner = THIS_MODULE,
+static const struct file_operations raw_ctl_fops = {
+ .unlocked_ioctl = raw_ctl_ioctl,
+ .open = raw_open,
+ .owner = THIS_MODULE,
};
-static struct cdev raw_cdev = {
- .kobj = {.name = "raw", },
- .owner = THIS_MODULE,
-};
+static struct cdev raw_cdev;
+
+static char *raw_devnode(struct device *dev, mode_t *mode)
+{
+ return kasprintf(GFP_KERNEL, "raw/%s", dev_name(dev));
+}
static int __init raw_init(void)
{
- int i;
dev_t dev = MKDEV(RAW_MAJOR, 0);
+ int ret;
- if (register_chrdev_region(dev, MAX_RAW_MINORS, "raw"))
+ ret = register_chrdev_region(dev, MAX_RAW_MINORS, "raw");
+ if (ret)
goto error;
cdev_init(&raw_cdev, &raw_fops);
- if (cdev_add(&raw_cdev, dev, MAX_RAW_MINORS)) {
+ ret = cdev_add(&raw_cdev, dev, MAX_RAW_MINORS);
+ if (ret) {
kobject_put(&raw_cdev.kobj);
- unregister_chrdev_region(dev, MAX_RAW_MINORS);
- goto error;
+ goto error_region;
}
raw_class = class_create(THIS_MODULE, "raw");
if (IS_ERR(raw_class)) {
printk(KERN_ERR "Error creating raw class.\n");
cdev_del(&raw_cdev);
- unregister_chrdev_region(dev, MAX_RAW_MINORS);
- goto error;
+ ret = PTR_ERR(raw_class);
+ goto error_region;
}
- class_device_create(raw_class, MKDEV(RAW_MAJOR, 0), NULL, "rawctl");
-
- devfs_mk_cdev(MKDEV(RAW_MAJOR, 0),
- S_IFCHR | S_IRUGO | S_IWUGO,
- "raw/rawctl");
- for (i = 1; i < MAX_RAW_MINORS; i++)
- devfs_mk_cdev(MKDEV(RAW_MAJOR, i),
- S_IFCHR | S_IRUGO | S_IWUGO,
- "raw/raw%d", i);
+ raw_class->devnode = raw_devnode;
+ device_create(raw_class, NULL, MKDEV(RAW_MAJOR, 0), NULL, "rawctl");
+
return 0;
+error_region:
+ unregister_chrdev_region(dev, MAX_RAW_MINORS);
error:
- printk(KERN_ERR "error register raw device\n");
- return 1;
+ return ret;
}
static void __exit raw_exit(void)
{
- int i;
-
- for (i = 1; i < MAX_RAW_MINORS; i++)
- devfs_remove("raw/raw%d", i);
- devfs_remove("raw/rawctl");
- devfs_remove("raw");
- class_device_destroy(raw_class, MKDEV(RAW_MAJOR, 0));
+ device_destroy(raw_class, MKDEV(RAW_MAJOR, 0));
class_destroy(raw_class);
cdev_del(&raw_cdev);
unregister_chrdev_region(MKDEV(RAW_MAJOR, 0), MAX_RAW_MINORS);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff