summaryrefslogtreecommitdiffstats
path: root/block/compat_ioctl.c
diff options
context:
space:
mode:
Diffstat (limited to 'block/compat_ioctl.c')
-rw-r--r--block/compat_ioctl.c175
1 files changed, 70 insertions, 105 deletions
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index 1e559fba7bd..3098c92402f 100644
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -71,8 +71,8 @@ static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev,
return ret;
}
-static int compat_hdio_ioctl(struct inode *inode, struct file *file,
- struct gendisk *disk, unsigned int cmd, unsigned long arg)
+static int compat_hdio_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg)
{
mm_segment_t old_fs = get_fs();
unsigned long kval;
@@ -80,7 +80,7 @@ static int compat_hdio_ioctl(struct inode *inode, struct file *file,
int error;
set_fs(KERNEL_DS);
- error = blkdev_driver_ioctl(inode, file, disk,
+ error = __blkdev_driver_ioctl(bdev, mode,
cmd, (unsigned long)(&kval));
set_fs(old_fs);
@@ -111,8 +111,8 @@ struct compat_cdrom_generic_command {
compat_caddr_t reserved[1];
};
-static int compat_cdrom_read_audio(struct inode *inode, struct file *file,
- struct gendisk *disk, unsigned int cmd, unsigned long arg)
+static int compat_cdrom_read_audio(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg)
{
struct cdrom_read_audio __user *cdread_audio;
struct compat_cdrom_read_audio __user *cdread_audio32;
@@ -134,12 +134,12 @@ static int compat_cdrom_read_audio(struct inode *inode, struct file *file,
if (put_user(datap, &cdread_audio->buf))
return -EFAULT;
- return blkdev_driver_ioctl(inode, file, disk, cmd,
+ return __blkdev_driver_ioctl(bdev, mode, cmd,
(unsigned long)cdread_audio);
}
-static int compat_cdrom_generic_command(struct inode *inode, struct file *file,
- struct gendisk *disk, unsigned int cmd, unsigned long arg)
+static int compat_cdrom_generic_command(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg)
{
struct cdrom_generic_command __user *cgc;
struct compat_cdrom_generic_command __user *cgc32;
@@ -167,7 +167,7 @@ static int compat_cdrom_generic_command(struct inode *inode, struct file *file,
put_user(compat_ptr(data), &cgc->reserved[0]))
return -EFAULT;
- return blkdev_driver_ioctl(inode, file, disk, cmd, (unsigned long)cgc);
+ return __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)cgc);
}
struct compat_blkpg_ioctl_arg {
@@ -177,7 +177,7 @@ struct compat_blkpg_ioctl_arg {
compat_caddr_t data;
};
-static int compat_blkpg_ioctl(struct inode *inode, struct file *file,
+static int compat_blkpg_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, struct compat_blkpg_ioctl_arg __user *ua32)
{
struct blkpg_ioctl_arg __user *a = compat_alloc_user_space(sizeof(*a));
@@ -196,7 +196,7 @@ static int compat_blkpg_ioctl(struct inode *inode, struct file *file,
if (err)
return err;
- return blkdev_ioctl(inode, file, cmd, (unsigned long)a);
+ return blkdev_ioctl(bdev, mode, cmd, (unsigned long)a);
}
#define BLKBSZGET_32 _IOR(0x12, 112, int)
@@ -308,8 +308,8 @@ static struct {
#define NR_FD_IOCTL_TRANS ARRAY_SIZE(fd_ioctl_trans_table)
-static int compat_fd_ioctl(struct inode *inode, struct file *file,
- struct gendisk *disk, unsigned int cmd, unsigned long arg)
+static int compat_fd_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg)
{
mm_segment_t old_fs = get_fs();
void *karg = NULL;
@@ -413,7 +413,7 @@ static int compat_fd_ioctl(struct inode *inode, struct file *file,
return -EINVAL;
}
set_fs(KERNEL_DS);
- err = blkdev_driver_ioctl(inode, file, disk, kcmd, (unsigned long)karg);
+ err = __blkdev_driver_ioctl(bdev, mode, kcmd, (unsigned long)karg);
set_fs(old_fs);
if (err)
goto out;
@@ -579,8 +579,8 @@ static int compat_blk_trace_setup(struct block_device *bdev, char __user *arg)
return 0;
}
-static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file,
- struct gendisk *disk, unsigned cmd, unsigned long arg)
+static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned cmd, unsigned long arg)
{
int ret;
@@ -596,7 +596,7 @@ static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file,
case HDIO_GET_ACOUSTIC:
case HDIO_GET_ADDRESS:
case HDIO_GET_BUSSTATE:
- return compat_hdio_ioctl(inode, file, disk, cmd, arg);
+ return compat_hdio_ioctl(bdev, mode, cmd, arg);
case FDSETPRM32:
case FDDEFPRM32:
case FDGETPRM32:
@@ -606,11 +606,11 @@ static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file,
case FDPOLLDRVSTAT32:
case FDGETFDCSTAT32:
case FDWERRORGET32:
- return compat_fd_ioctl(inode, file, disk, cmd, arg);
+ return compat_fd_ioctl(bdev, mode, cmd, arg);
case CDROMREADAUDIO:
- return compat_cdrom_read_audio(inode, file, disk, cmd, arg);
+ return compat_cdrom_read_audio(bdev, mode, cmd, arg);
case CDROM_SEND_PACKET:
- return compat_cdrom_generic_command(inode, file, disk, cmd, arg);
+ return compat_cdrom_generic_command(bdev, mode, cmd, arg);
/*
* No handler required for the ones below, we just need to
@@ -679,55 +679,49 @@ static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file,
case DVD_WRITE_STRUCT:
case DVD_AUTH:
arg = (unsigned long)compat_ptr(arg);
- /* These intepret arg as an unsigned long, not as a pointer,
- * so we must not do compat_ptr() conversion. */
- case HDIO_SET_MULTCOUNT:
- case HDIO_SET_UNMASKINTR:
- case HDIO_SET_KEEPSETTINGS:
- case HDIO_SET_32BIT:
- case HDIO_SET_NOWERR:
- case HDIO_SET_DMA:
- case HDIO_SET_PIO_MODE:
- case HDIO_SET_NICE:
- case HDIO_SET_WCACHE:
- case HDIO_SET_ACOUSTIC:
- case HDIO_SET_BUSSTATE:
- case HDIO_SET_ADDRESS:
- case CDROMEJECT_SW:
- case CDROM_SET_OPTIONS:
- case CDROM_CLEAR_OPTIONS:
- case CDROM_SELECT_SPEED:
- case CDROM_SELECT_DISC:
- case CDROM_MEDIA_CHANGED:
- case CDROM_DRIVE_STATUS:
- case CDROM_LOCKDOOR:
- case CDROM_DEBUG:
break;
default:
/* unknown ioctl number */
return -ENOIOCTLCMD;
}
- if (disk->fops->unlocked_ioctl)
- return disk->fops->unlocked_ioctl(file, cmd, arg);
-
- if (disk->fops->ioctl) {
- lock_kernel();
- ret = disk->fops->ioctl(inode, file, cmd, arg);
- unlock_kernel();
- return ret;
- }
-
- return -ENOTTY;
+ return __blkdev_driver_ioctl(bdev, mode, cmd, arg);
}
-static int compat_blkdev_locked_ioctl(struct inode *inode, struct file *file,
- struct block_device *bdev,
- unsigned cmd, unsigned long arg)
+/* Most of the generic ioctls are handled in the normal fallback path.
+ This assumes the blkdev's low level compat_ioctl always returns
+ ENOIOCTLCMD for unknown ioctls. */
+long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
+ int ret = -ENOIOCTLCMD;
+ struct inode *inode = file->f_mapping->host;
+ struct block_device *bdev = inode->i_bdev;
+ struct gendisk *disk = bdev->bd_disk;
+ fmode_t mode = file->f_mode;
struct backing_dev_info *bdi;
+ loff_t size;
+
+ if (file->f_flags & O_NDELAY)
+ mode |= FMODE_NDELAY_NOW;
switch (cmd) {
+ case HDIO_GETGEO:
+ return compat_hdio_getgeo(disk, bdev, compat_ptr(arg));
+ case BLKFLSBUF:
+ case BLKROSET:
+ case BLKDISCARD:
+ /*
+ * the ones below are implemented in blkdev_locked_ioctl,
+ * but we call blkdev_ioctl, which gets the lock for us
+ */
+ case BLKRRPART:
+ return blkdev_ioctl(bdev, mode, cmd,
+ (unsigned long)compat_ptr(arg));
+ case BLKBSZSET_32:
+ return blkdev_ioctl(bdev, mode, BLKBSZSET,
+ (unsigned long)compat_ptr(arg));
+ case BLKPG:
+ return compat_blkpg_ioctl(bdev, mode, cmd, compat_ptr(arg));
case BLKRAGET:
case BLKFRAGET:
if (!arg)
@@ -753,65 +747,36 @@ static int compat_blkdev_locked_ioctl(struct inode *inode, struct file *file,
bdi = blk_get_backing_dev_info(bdev);
if (bdi == NULL)
return -ENOTTY;
+ lock_kernel();
bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;
+ unlock_kernel();
return 0;
case BLKGETSIZE:
- if ((bdev->bd_inode->i_size >> 9) > ~0UL)
+ size = bdev->bd_inode->i_size;
+ if ((size >> 9) > ~0UL)
return -EFBIG;
- return compat_put_ulong(arg, bdev->bd_inode->i_size >> 9);
+ return compat_put_ulong(arg, size >> 9);
case BLKGETSIZE64_32:
return compat_put_u64(arg, bdev->bd_inode->i_size);
case BLKTRACESETUP32:
- return compat_blk_trace_setup(bdev, compat_ptr(arg));
+ lock_kernel();
+ ret = compat_blk_trace_setup(bdev, compat_ptr(arg));
+ unlock_kernel();
+ return ret;
case BLKTRACESTART: /* compatible */
case BLKTRACESTOP: /* compatible */
case BLKTRACETEARDOWN: /* compatible */
- return blk_trace_ioctl(bdev, cmd, compat_ptr(arg));
- }
- return -ENOIOCTLCMD;
-}
-
-/* Most of the generic ioctls are handled in the normal fallback path.
- This assumes the blkdev's low level compat_ioctl always returns
- ENOIOCTLCMD for unknown ioctls. */
-long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
-{
- int ret = -ENOIOCTLCMD;
- struct inode *inode = file->f_mapping->host;
- struct block_device *bdev = inode->i_bdev;
- struct gendisk *disk = bdev->bd_disk;
-
- switch (cmd) {
- case HDIO_GETGEO:
- return compat_hdio_getgeo(disk, bdev, compat_ptr(arg));
- case BLKFLSBUF:
- case BLKROSET:
- case BLKDISCARD:
- /*
- * the ones below are implemented in blkdev_locked_ioctl,
- * but we call blkdev_ioctl, which gets the lock for us
- */
- case BLKRRPART:
- return blkdev_ioctl(inode, file, cmd,
- (unsigned long)compat_ptr(arg));
- case BLKBSZSET_32:
- return blkdev_ioctl(inode, file, BLKBSZSET,
- (unsigned long)compat_ptr(arg));
- case BLKPG:
- return compat_blkpg_ioctl(inode, file, cmd, compat_ptr(arg));
- }
-
- lock_kernel();
- ret = compat_blkdev_locked_ioctl(inode, file, bdev, cmd, arg);
- /* FIXME: why do we assume -> compat_ioctl needs the BKL? */
- if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
- ret = disk->fops->compat_ioctl(file, cmd, arg);
- unlock_kernel();
-
- if (ret != -ENOIOCTLCMD)
+ lock_kernel();
+ ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg));
+ unlock_kernel();
return ret;
-
- return compat_blkdev_driver_ioctl(inode, file, disk, cmd, arg);
+ default:
+ if (disk->fops->compat_ioctl)
+ ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
+ if (ret == -ENOIOCTLCMD)
+ ret = compat_blkdev_driver_ioctl(bdev, mode, cmd, arg);
+ return ret;
+ }
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-11 15:35:37 +0000