Commit 22484856 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev 

* git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev: (66 commits)
  [PATCH] kill the rest of struct file propagation in block ioctls
  [PATCH] get rid of struct file use in blkdev_ioctl() BLKBSZSET
  [PATCH] get rid of blkdev_locked_ioctl()
  [PATCH] get rid of blkdev_driver_ioctl()
  [PATCH] sanitize blkdev_get() and friends
  [PATCH] remember mode of reiserfs journal
  [PATCH] propagate mode through swsusp_close()
  [PATCH] propagate mode through open_bdev_excl/close_bdev_excl
  [PATCH] pass fmode_t to blkdev_put()
  [PATCH] kill the unused bsize on the send side of /dev/loop
  [PATCH] trim file propagation in block/compat_ioctl.c
  [PATCH] end of methods switch: remove the old ones
  [PATCH] switch sr
  [PATCH] switch sd
  [PATCH] switch ide-scsi
  [PATCH] switch tape_block
  [PATCH] switch dcssblk
  [PATCH] switch dasd
  [PATCH] switch mtd_blkdevs
  [PATCH] switch mmc
  ...
parents 5ed487bc 56b26add

arch/um/drivers/ubd_kern.c

+9 −10
Original line number Diff line number Diff line
@@ -98,9 +98,9 @@ static inline void ubd_set_bit(__u64 bit, unsigned char *data) 


static DEFINE_MUTEX(ubd_lock);



static int ubd_open(struct inode * inode, struct file * filp);

static int ubd_release(struct inode * inode, struct file * file);

static int ubd_ioctl(struct inode * inode, struct file * file,

static int ubd_open(struct block_device *bdev, fmode_t mode);

static int ubd_release(struct gendisk *disk, fmode_t mode);

static int ubd_ioctl(struct block_device *bdev, fmode_t mode,

		     unsigned int cmd, unsigned long arg);

static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo);
@@ -1112,9 +1112,9 @@ static int __init ubd_driver_init(void){ 


device_initcall(ubd_driver_init);



static int ubd_open(struct inode *inode, struct file *filp)

static int ubd_open(struct block_device *bdev, fmode_t mode)

{

	struct gendisk *disk = inode->i_bdev->bd_disk;

	struct gendisk *disk = bdev->bd_disk;

	struct ubd *ubd_dev = disk->private_data;

	int err = 0;
@@ -1131,7 +1131,7 @@ static int ubd_open(struct inode *inode, struct file *filp) 


	/* This should no more be needed. And it didn't work anyway to exclude

	 * read-write remounting of filesystems.*/

	/*if((filp->f_mode & FMODE_WRITE) && !ubd_dev->openflags.w){

	/*if((mode & FMODE_WRITE) && !ubd_dev->openflags.w){

	        if(--ubd_dev->count == 0) ubd_close_dev(ubd_dev);

	        err = -EROFS;

	}*/
@@ -1139,9 +1139,8 @@ static int ubd_open(struct inode *inode, struct file *filp) 
	return err;

}



static int ubd_release(struct inode * inode, struct file * file)

static int ubd_release(struct gendisk *disk, fmode_t mode)

{

	struct gendisk *disk = inode->i_bdev->bd_disk;

	struct ubd *ubd_dev = disk->private_data;



	if(--ubd_dev->count == 0)
@@ -1306,10 +1305,10 @@ static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo) 
	return 0;

}



static int ubd_ioctl(struct inode * inode, struct file * file,

static int ubd_ioctl(struct block_device *bdev, fmode_t mode,

		     unsigned int cmd, unsigned long arg)

{

	struct ubd *ubd_dev = inode->i_bdev->bd_disk->private_data;

	struct ubd *ubd_dev = bdev->bd_disk->private_data;

	struct hd_driveid ubd_id = {

		.cyls		= 0,

		.heads		= 128,

block/bsg.c

+5 −4
Original line number Diff line number Diff line
@@ -173,7 +173,7 @@ unlock: 


static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,

				struct sg_io_v4 *hdr, struct bsg_device *bd,

				int has_write_perm)

				fmode_t has_write_perm)

{

	if (hdr->request_len > BLK_MAX_CDB) {

		rq->cmd = kzalloc(hdr->request_len, GFP_KERNEL);
@@ -242,7 +242,7 @@ bsg_validate_sgv4_hdr(struct request_queue *q, struct sg_io_v4 *hdr, int *rw) 
 * map sg_io_v4 to a request.

 */

static struct request *

bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, int has_write_perm)

bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm)

{

	struct request_queue *q = bd->queue;

	struct request *rq, *next_rq = NULL;
@@ -601,7 +601,8 @@ bsg_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) 
}



static int __bsg_write(struct bsg_device *bd, const char __user *buf,

		       size_t count, ssize_t *bytes_written, int has_write_perm)

		       size_t count, ssize_t *bytes_written,

		       fmode_t has_write_perm)

{

	struct bsg_command *bc;

	struct request *rq;
@@ -913,7 +914,7 @@ static long bsg_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
	case SG_EMULATED_HOST:

	case SCSI_IOCTL_SEND_COMMAND: {

		void __user *uarg = (void __user *) arg;

		return scsi_cmd_ioctl(file, bd->queue, NULL, cmd, uarg);

		return scsi_cmd_ioctl(bd->queue, NULL, file->f_mode, cmd, uarg);

	}

	case SG_IO: {

		struct request *rq;

block/cmd-filter.c

+1 −1
Original line number Diff line number Diff line
@@ -27,7 +27,7 @@ 
#include <linux/cdrom.h>



int blk_verify_command(struct blk_cmd_filter *filter,

		       unsigned char *cmd, int has_write_perm)

		       unsigned char *cmd, fmode_t has_write_perm)

{

	/* root can do any command. */

	if (capable(CAP_SYS_RAWIO))

block/compat_ioctl.c

+70 −105
Original line number Diff line number Diff line
@@ -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);

		ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg));

		unlock_kernel();



	if (ret != -ENOIOCTLCMD)

		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;

	}

}

block/ioctl.c

+89 −84
Original line number Diff line number Diff line
@@ -201,97 +201,41 @@ static int put_u64(unsigned long arg, u64 val) 
	return put_user(val, (u64 __user *)arg);

}



static int blkdev_locked_ioctl(struct file *file, struct block_device *bdev,

int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,

			unsigned cmd, unsigned long arg)

{

	struct backing_dev_info *bdi;

	int ret, n;



	switch (cmd) {

	case BLKRAGET:

	case BLKFRAGET:

		if (!arg)

			return -EINVAL;

		bdi = blk_get_backing_dev_info(bdev);

		if (bdi == NULL)

			return -ENOTTY;

		return put_long(arg, (bdi->ra_pages * PAGE_CACHE_SIZE) / 512);

	case BLKROGET:

		return put_int(arg, bdev_read_only(bdev) != 0);

	case BLKBSZGET: /* get the logical block size (cf. BLKSSZGET) */

		return put_int(arg, block_size(bdev));

	case BLKSSZGET: /* get block device hardware sector size */

		return put_int(arg, bdev_hardsect_size(bdev));

	case BLKSECTGET:

		return put_ushort(arg, bdev_get_queue(bdev)->max_sectors);

	case BLKRASET:

	case BLKFRASET:

		if(!capable(CAP_SYS_ADMIN))

			return -EACCES;

		bdi = blk_get_backing_dev_info(bdev);

		if (bdi == NULL)

			return -ENOTTY;

		bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;

		return 0;

	case BLKBSZSET:

		/* set the logical block size */

		if (!capable(CAP_SYS_ADMIN))

			return -EACCES;

		if (!arg)

			return -EINVAL;

		if (get_user(n, (int __user *) arg))

			return -EFAULT;

		if (bd_claim(bdev, file) < 0)

			return -EBUSY;

		ret = set_blocksize(bdev, n);

		bd_release(bdev);

		return ret;

	case BLKPG:

		return blkpg_ioctl(bdev, (struct blkpg_ioctl_arg __user *) arg);

	case BLKRRPART:

		return blkdev_reread_part(bdev);

	case BLKGETSIZE:

		if ((bdev->bd_inode->i_size >> 9) > ~0UL)

			return -EFBIG;

		return put_ulong(arg, bdev->bd_inode->i_size >> 9);

	case BLKGETSIZE64:

		return put_u64(arg, bdev->bd_inode->i_size);

	case BLKTRACESTART:

	case BLKTRACESTOP:

	case BLKTRACESETUP:

	case BLKTRACETEARDOWN:

		return blk_trace_ioctl(bdev, cmd, (char __user *) arg);

	}

	return -ENOIOCTLCMD;

}



int blkdev_driver_ioctl(struct inode *inode, struct file *file,

			struct gendisk *disk, unsigned cmd, unsigned long arg)

{

	struct gendisk *disk = bdev->bd_disk;

	int ret;

	if (disk->fops->unlocked_ioctl)

		return disk->fops->unlocked_ioctl(file, cmd, arg);



	if (disk->fops->ioctl) {

	if (disk->fops->ioctl)

		return disk->fops->ioctl(bdev, mode, cmd, arg);



	if (disk->fops->locked_ioctl) {

		lock_kernel();

		ret = disk->fops->ioctl(inode, file, cmd, arg);

		ret = disk->fops->locked_ioctl(bdev, mode, cmd, arg);

		unlock_kernel();

		return ret;

	}



	return -ENOTTY;

}

EXPORT_SYMBOL_GPL(blkdev_driver_ioctl);

/*

 * For the record: _GPL here is only because somebody decided to slap it

 * on the previous export.  Sheer idiocy, since it wasn't copyrightable

 * at all and could be open-coded without any exports by anybody who cares.

 */

EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl);



/*

 * always keep this in sync with compat_blkdev_ioctl() and

 * compat_blkdev_locked_ioctl()

 */

int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd,

int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,

			unsigned long arg)

{

	struct block_device *bdev = inode->i_bdev;

	struct gendisk *disk = bdev->bd_disk;

	struct backing_dev_info *bdi;

	loff_t size;

	int ret, n;



	switch(cmd) {
@@ -299,7 +243,7 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd, 
		if (!capable(CAP_SYS_ADMIN))

			return -EACCES;



		ret = blkdev_driver_ioctl(inode, file, disk, cmd, arg);

		ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);

		/* -EINVAL to handle old uncorrected drivers */

		if (ret != -EINVAL && ret != -ENOTTY)

			return ret;
@@ -311,7 +255,7 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd, 
		return 0;



	case BLKROSET:

		ret = blkdev_driver_ioctl(inode, file, disk, cmd, arg);

		ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);

		/* -EINVAL to handle old uncorrected drivers */

		if (ret != -EINVAL && ret != -ENOTTY)

			return ret;
@@ -327,7 +271,7 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd, 
	case BLKDISCARD: {

		uint64_t range[2];



		if (!(file->f_mode & FMODE_WRITE))

		if (!(mode & FMODE_WRITE))

			return -EBADF;



		if (copy_from_user(range, (void __user *)arg, sizeof(range)))
@@ -357,14 +301,75 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd, 
			return -EFAULT;

		return 0;

	}

	}



	case BLKRAGET:

	case BLKFRAGET:

		if (!arg)

			return -EINVAL;

		bdi = blk_get_backing_dev_info(bdev);

		if (bdi == NULL)

			return -ENOTTY;

		return put_long(arg, (bdi->ra_pages * PAGE_CACHE_SIZE) / 512);

	case BLKROGET:

		return put_int(arg, bdev_read_only(bdev) != 0);

	case BLKBSZGET: /* get the logical block size (cf. BLKSSZGET) */

		return put_int(arg, block_size(bdev));

	case BLKSSZGET: /* get block device hardware sector size */

		return put_int(arg, bdev_hardsect_size(bdev));

	case BLKSECTGET:

		return put_ushort(arg, bdev_get_queue(bdev)->max_sectors);

	case BLKRASET:

	case BLKFRASET:

		if(!capable(CAP_SYS_ADMIN))

			return -EACCES;

		bdi = blk_get_backing_dev_info(bdev);

		if (bdi == NULL)

			return -ENOTTY;

		lock_kernel();

	ret = blkdev_locked_ioctl(file, bdev, cmd, arg);

		bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;

		unlock_kernel();

	if (ret != -ENOIOCTLCMD)

		return 0;

	case BLKBSZSET:

		/* set the logical block size */

		if (!capable(CAP_SYS_ADMIN))

			return -EACCES;

		if (!arg)

			return -EINVAL;

		if (get_user(n, (int __user *) arg))

			return -EFAULT;

		if (!(mode & FMODE_EXCL) && bd_claim(bdev, &bdev) < 0)

			return -EBUSY;

		ret = set_blocksize(bdev, n);

		if (!(mode & FMODE_EXCL))

			bd_release(bdev);

		return ret;

	case BLKPG:

		lock_kernel();

		ret = blkpg_ioctl(bdev, (struct blkpg_ioctl_arg __user *) arg);

		unlock_kernel();

		break;

	case BLKRRPART:

		lock_kernel();

		ret = blkdev_reread_part(bdev);

		unlock_kernel();

		break;

	case BLKGETSIZE:

		size = bdev->bd_inode->i_size;

		if ((size >> 9) > ~0UL)

			return -EFBIG;

		return put_ulong(arg, size >> 9);

	case BLKGETSIZE64:

		return put_u64(arg, bdev->bd_inode->i_size);

	case BLKTRACESTART:

	case BLKTRACESTOP:

	case BLKTRACESETUP:

	case BLKTRACETEARDOWN:

		lock_kernel();

		ret = blk_trace_ioctl(bdev, cmd, (char __user *) arg);

		unlock_kernel();

		break;

	default:

		ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);

	}

	return ret;



	return blkdev_driver_ioctl(inode, file, disk, cmd, arg);

}

EXPORT_SYMBOL_GPL(blkdev_ioctl);

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