[linux-block.git] / block / compat_ioctl.c

#include <linux/blkdev.h>
#include <linux/blkpg.h>
#include <linux/blktrace_api.h>
#include <linux/cdrom.h>
#include <linux/compat.h>
#include <linux/elevator.h>
#include <linux/fd.h>
#include <linux/hdreg.h>
#include <linux/syscalls.h>
#include <linux/smp_lock.h>
#include <linux/types.h>
#include <linux/uaccess.h>

static int compat_put_ushort(unsigned long arg, unsigned short val)
{
	return put_user(val, (unsigned short __user *)compat_ptr(arg));
}

static int compat_put_int(unsigned long arg, int val)
{
	return put_user(val, (compat_int_t __user *)compat_ptr(arg));
}

static int compat_put_long(unsigned long arg, long val)
{
	return put_user(val, (compat_long_t __user *)compat_ptr(arg));
}

static int compat_put_ulong(unsigned long arg, compat_ulong_t val)
{
	return put_user(val, (compat_ulong_t __user *)compat_ptr(arg));
}

static int compat_put_u64(unsigned long arg, u64 val)
{
	return put_user(val, (compat_u64 __user *)compat_ptr(arg));
}

struct compat_hd_geometry {
	unsigned char heads;
	unsigned char sectors;
	unsigned short cylinders;
	u32 start;
};

static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev,
			struct compat_hd_geometry __user *ugeo)
{
	struct hd_geometry geo;
	int ret;

	if (!ugeo)
		return -EINVAL;
	if (!disk->fops->getgeo)
		return -ENOTTY;

	/*
	 * We need to set the startsect first, the driver may
	 * want to override it.
	 */
	geo.start = get_start_sect(bdev);
	ret = disk->fops->getgeo(bdev, &geo);
	if (ret)
		return ret;

	ret = copy_to_user(ugeo, &geo, 4);
	ret |= __put_user(geo.start, &ugeo->start);
	if (ret)
		ret = -EFAULT;

	return ret;
}

static int compat_hdio_ioctl(struct inode *inode, struct file *file,
		struct gendisk *disk, unsigned int cmd, unsigned long arg)
{
	mm_segment_t old_fs = get_fs();
	unsigned long kval;
	unsigned int __user *uvp;
	int error;

	set_fs(KERNEL_DS);
	error = blkdev_driver_ioctl(inode, file, disk,
				cmd, (unsigned long)(&kval));
	set_fs(old_fs);

	if (error == 0) {
		uvp = compat_ptr(arg);
		if (put_user(kval, uvp))
			error = -EFAULT;
	}
	return error;
}

struct compat_cdrom_read_audio {
	union cdrom_addr	addr;
	u8			addr_format;
	compat_int_t		nframes;
	compat_caddr_t		buf;
};

struct compat_cdrom_generic_command {
	unsigned char	cmd[CDROM_PACKET_SIZE];
	compat_caddr_t	buffer;
	compat_uint_t	buflen;
	compat_int_t	stat;
	compat_caddr_t	sense;
	unsigned char	data_direction;
	compat_int_t	quiet;
	compat_int_t	timeout;
	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)
{
	struct cdrom_read_audio __user *cdread_audio;
	struct compat_cdrom_read_audio __user *cdread_audio32;
	__u32 data;
	void __user *datap;

	cdread_audio = compat_alloc_user_space(sizeof(*cdread_audio));
	cdread_audio32 = compat_ptr(arg);

	if (copy_in_user(&cdread_audio->addr,
			 &cdread_audio32->addr,
			 (sizeof(*cdread_audio32) -
			  sizeof(compat_caddr_t))))
		return -EFAULT;

	if (get_user(data, &cdread_audio32->buf))
		return -EFAULT;
	datap = compat_ptr(data);
	if (put_user(datap, &cdread_audio->buf))
		return -EFAULT;

	return blkdev_driver_ioctl(inode, file, disk, 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)
{
	struct cdrom_generic_command __user *cgc;
	struct compat_cdrom_generic_command __user *cgc32;
	u32 data;
	unsigned char dir;
	int itmp;

	cgc = compat_alloc_user_space(sizeof(*cgc));
	cgc32 = compat_ptr(arg);

	if (copy_in_user(&cgc->cmd, &cgc32->cmd, sizeof(cgc->cmd)) ||
	    get_user(data, &cgc32->buffer) ||
	    put_user(compat_ptr(data), &cgc->buffer) ||
	    copy_in_user(&cgc->buflen, &cgc32->buflen,
			 (sizeof(unsigned int) + sizeof(int))) ||
	    get_user(data, &cgc32->sense) ||
	    put_user(compat_ptr(data), &cgc->sense) ||
	    get_user(dir, &cgc32->data_direction) ||
	    put_user(dir, &cgc->data_direction) ||
	    get_user(itmp, &cgc32->quiet) ||
	    put_user(itmp, &cgc->quiet) ||
	    get_user(itmp, &cgc32->timeout) ||
	    put_user(itmp, &cgc->timeout) ||
	    get_user(data, &cgc32->reserved[0]) ||
	    put_user(compat_ptr(data), &cgc->reserved[0]))
		return -EFAULT;

	return blkdev_driver_ioctl(inode, file, disk, cmd, (unsigned long)cgc);
}

struct compat_blkpg_ioctl_arg {
	compat_int_t op;
	compat_int_t flags;
	compat_int_t datalen;
	compat_caddr_t data;
};

static int compat_blkpg_ioctl(struct inode *inode, struct file *file,
		unsigned int cmd, struct compat_blkpg_ioctl_arg __user *ua32)
{
	struct blkpg_ioctl_arg __user *a = compat_alloc_user_space(sizeof(*a));
	compat_caddr_t udata;
	compat_int_t n;
	int err;

	err = get_user(n, &ua32->op);
	err |= put_user(n, &a->op);
	err |= get_user(n, &ua32->flags);
	err |= put_user(n, &a->flags);
	err |= get_user(n, &ua32->datalen);
	err |= put_user(n, &a->datalen);
	err |= get_user(udata, &ua32->data);
	err |= put_user(compat_ptr(udata), &a->data);
	if (err)
		return err;

	return blkdev_ioctl(inode, file, cmd, (unsigned long)a);
}

#define BLKBSZGET_32		_IOR(0x12, 112, int)
#define BLKBSZSET_32		_IOW(0x12, 113, int)
#define BLKGETSIZE64_32		_IOR(0x12, 114, int)

struct compat_blk_user_trace_setup {
	char name[32];
	u16 act_mask;
	u32 buf_size;
	u32 buf_nr;
	compat_u64 start_lba;
	compat_u64 end_lba;
	u32 pid;
};
#define BLKTRACESETUP32 _IOWR(0x12, 115, struct compat_blk_user_trace_setup)

static int compat_blk_trace_setup(struct block_device *bdev, char __user *arg)
{
	struct blk_user_trace_setup buts;
	struct compat_blk_user_trace_setup cbuts;
	struct request_queue *q;
	int ret;

	q = bdev_get_queue(bdev);
	if (!q)
		return -ENXIO;

	if (copy_from_user(&cbuts, arg, sizeof(cbuts)))
		return -EFAULT;

	buts = (struct blk_user_trace_setup) {
		.act_mask = cbuts.act_mask,
		.buf_size = cbuts.buf_size,
		.buf_nr = cbuts.buf_nr,
		.start_lba = cbuts.start_lba,
		.end_lba = cbuts.end_lba,
		.pid = cbuts.pid,
	};
	memcpy(&buts.name, &cbuts.name, 32);

	mutex_lock(&bdev->bd_mutex);
	ret = do_blk_trace_setup(q, bdev, &buts);
	mutex_unlock(&bdev->bd_mutex);
	if (ret)
		return ret;

	if (copy_to_user(arg, &buts.name, 32))
		return -EFAULT;

	return 0;
}

static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file,
			struct gendisk *disk, unsigned cmd, unsigned long arg)
{
	int ret;

	switch (arg) {
	case HDIO_GET_UNMASKINTR:
	case HDIO_GET_MULTCOUNT:
	case HDIO_GET_KEEPSETTINGS:
	case HDIO_GET_32BIT:
	case HDIO_GET_NOWERR:
	case HDIO_GET_DMA:
	case HDIO_GET_NICE:
	case HDIO_GET_WCACHE:
	case HDIO_GET_ACOUSTIC:
	case HDIO_GET_ADDRESS:
	case HDIO_GET_BUSSTATE:
		return compat_hdio_ioctl(inode, file, disk, cmd, arg);
	case CDROMREADAUDIO:
		return compat_cdrom_read_audio(inode, file, disk, cmd, arg);
	case CDROM_SEND_PACKET:
		return compat_cdrom_generic_command(inode, file, disk, cmd, arg);

	/*
	 * No handler required for the ones below, we just need to
	 * convert arg to a 64 bit pointer.
	 */
	case BLKSECTSET:
	/*
	 * 0x03 -- HD/IDE ioctl's used by hdparm and friends.
	 *         Some need translations, these do not.
	 */
	case HDIO_GET_IDENTITY:
	case HDIO_DRIVE_TASK:
	case HDIO_DRIVE_CMD:
	case HDIO_SCAN_HWIF:
	/* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */
	case 0x330:
	/* 0x02 -- Floppy ioctls */
	case FDMSGON:
	case FDMSGOFF:
	case FDSETEMSGTRESH:
	case FDFLUSH:
	case FDWERRORCLR:
	case FDSETMAXERRS:
	case FDGETMAXERRS:
	case FDGETDRVTYP:
	case FDEJECT:
	case FDCLRPRM:
	case FDFMTBEG:
	case FDFMTEND:
	case FDRESET:
	case FDTWADDLE:
	case FDFMTTRK:
	case FDRAWCMD:
	/* CDROM stuff */
	case CDROMPAUSE:
	case CDROMRESUME:
	case CDROMPLAYMSF:
	case CDROMPLAYTRKIND:
	case CDROMREADTOCHDR:
	case CDROMREADTOCENTRY:
	case CDROMSTOP:
	case CDROMSTART:
	case CDROMEJECT:
	case CDROMVOLCTRL:
	case CDROMSUBCHNL:
	case CDROMMULTISESSION:
	case CDROM_GET_MCN:
	case CDROMRESET:
	case CDROMVOLREAD:
	case CDROMSEEK:
	case CDROMPLAYBLK:
	case CDROMCLOSETRAY:
	case CDROM_DISC_STATUS:
	case CDROM_CHANGER_NSLOTS:
	case CDROM_GET_CAPABILITY:
	/* Ignore cdrom.h about these next 5 ioctls, they absolutely do
	 * not take a struct cdrom_read, instead they take a struct cdrom_msf
	 * which is compatible.
	 */
	case CDROMREADMODE2:
	case CDROMREADMODE1:
	case CDROMREADRAW:
	case CDROMREADCOOKED:
	case CDROMREADALL:
	/* DVD ioctls */
	case DVD_READ_STRUCT:
	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;
}

static int compat_blkdev_locked_ioctl(struct inode *inode, struct file *file,
				struct block_device *bdev,
				unsigned cmd, unsigned long arg)
{
	struct backing_dev_info *bdi;

	switch (cmd) {
	case BLKRAGET:
	case BLKFRAGET:
		if (!arg)
			return -EINVAL;
		bdi = blk_get_backing_dev_info(bdev);
		if (bdi == NULL)
			return -ENOTTY;
		return compat_put_long(arg,
				       (bdi->ra_pages * PAGE_CACHE_SIZE) / 512);
	case BLKROGET: /* compatible */
		return compat_put_int(arg, bdev_read_only(bdev) != 0);
	case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
		return compat_put_int(arg, block_size(bdev));
	case BLKSSZGET: /* get block device hardware sector size */
		return compat_put_int(arg, bdev_hardsect_size(bdev));
	case BLKSECTGET:
		return compat_put_ushort(arg,
					 bdev_get_queue(bdev)->max_sectors);
	case BLKRASET: /* compatible, but no compat_ptr (!) */
	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 BLKGETSIZE:
		if ((bdev->bd_inode->i_size >> 9) > ~0UL)
			return -EFBIG;
		return compat_put_ulong(arg, bdev->bd_inode->i_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));
	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:
	/*
	 * 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)
		return ret;

	return compat_blkdev_driver_ioctl(inode, file, disk, cmd, arg);
}
Commit	Line	Data
f58c4c0a AB	1	#include <linux/blkdev.h>
	2	#include <linux/blkpg.h>
	3	#include <linux/blktrace_api.h>
	4	#include <linux/cdrom.h>
	5	#include <linux/compat.h>
	6	#include <linux/elevator.h>
	7	#include <linux/fd.h>
	8	#include <linux/hdreg.h>
	9	#include <linux/syscalls.h>
	10	#include <linux/smp_lock.h>
	11	#include <linux/types.h>
	12	#include <linux/uaccess.h>
	13
	14	static int compat_put_ushort(unsigned long arg, unsigned short val)
	15	{
	16	return put_user(val, (unsigned short __user *)compat_ptr(arg));
	17	}
	18
	19	static int compat_put_int(unsigned long arg, int val)
	20	{
	21	return put_user(val, (compat_int_t __user *)compat_ptr(arg));
	22	}
	23
	24	static int compat_put_long(unsigned long arg, long val)
	25	{
	26	return put_user(val, (compat_long_t __user *)compat_ptr(arg));
	27	}
	28
	29	static int compat_put_ulong(unsigned long arg, compat_ulong_t val)
	30	{
	31	return put_user(val, (compat_ulong_t __user *)compat_ptr(arg));
	32	}
	33
	34	static int compat_put_u64(unsigned long arg, u64 val)
	35	{
	36	return put_user(val, (compat_u64 __user *)compat_ptr(arg));
	37	}
	38
9617db08 AB	39	struct compat_hd_geometry {
	40	unsigned char heads;
	41	unsigned char sectors;
	42	unsigned short cylinders;
	43	u32 start;
	44	};
	45
	46	static int compat_hdio_getgeo(struct gendisk disk, struct block_device bdev,
	47	struct compat_hd_geometry __user *ugeo)
	48	{
	49	struct hd_geometry geo;
	50	int ret;
	51
	52	if (!ugeo)
	53	return -EINVAL;
	54	if (!disk->fops->getgeo)
	55	return -ENOTTY;
	56
	57	/*
	58	* We need to set the startsect first, the driver may
	59	* want to override it.
	60	*/
	61	geo.start = get_start_sect(bdev);
	62	ret = disk->fops->getgeo(bdev, &geo);
	63	if (ret)
	64	return ret;
	65
	66	ret = copy_to_user(ugeo, &geo, 4);
	67	ret \|= __put_user(geo.start, &ugeo->start);
	68	if (ret)
	69	ret = -EFAULT;
	70
	71	return ret;
	72	}
	73
	74	static int compat_hdio_ioctl(struct inode inode, struct file file,
	75	struct gendisk *disk, unsigned int cmd, unsigned long arg)
	76	{
	77	mm_segment_t old_fs = get_fs();
	78	unsigned long kval;
	79	unsigned int __user *uvp;
	80	int error;
	81
	82	set_fs(KERNEL_DS);
	83	error = blkdev_driver_ioctl(inode, file, disk,
	84	cmd, (unsigned long)(&kval));
	85	set_fs(old_fs);
	86
	87	if (error == 0) {
	88	uvp = compat_ptr(arg);
	89	if (put_user(kval, uvp))
	90	error = -EFAULT;
	91	}
	92	return error;
	93	}
	94
b3087cc4 AB	95	struct compat_cdrom_read_audio {
	96	union cdrom_addr addr;
	97	u8 addr_format;
	98	compat_int_t nframes;
	99	compat_caddr_t buf;
	100	};
	101
	102	struct compat_cdrom_generic_command {
	103	unsigned char cmd[CDROM_PACKET_SIZE];
	104	compat_caddr_t buffer;
	105	compat_uint_t buflen;
	106	compat_int_t stat;
	107	compat_caddr_t sense;
	108	unsigned char data_direction;
	109	compat_int_t quiet;
	110	compat_int_t timeout;
	111	compat_caddr_t reserved[1];
	112	};
	113
	114	static int compat_cdrom_read_audio(struct inode inode, struct file file,
	115	struct gendisk *disk, unsigned int cmd, unsigned long arg)
	116	{
	117	struct cdrom_read_audio __user *cdread_audio;
	118	struct compat_cdrom_read_audio __user *cdread_audio32;
	119	__u32 data;
	120	void __user *datap;
	121
	122	cdread_audio = compat_alloc_user_space(sizeof(*cdread_audio));
	123	cdread_audio32 = compat_ptr(arg);
	124
	125	if (copy_in_user(&cdread_audio->addr,
	126	&cdread_audio32->addr,
	127	(sizeof(*cdread_audio32) -
	128	sizeof(compat_caddr_t))))
	129	return -EFAULT;
	130
	131	if (get_user(data, &cdread_audio32->buf))
	132	return -EFAULT;
	133	datap = compat_ptr(data);
	134	if (put_user(datap, &cdread_audio->buf))
	135	return -EFAULT;
	136
	137	return blkdev_driver_ioctl(inode, file, disk, cmd,
	138	(unsigned long)cdread_audio);
	139	}
	140
	141	static int compat_cdrom_generic_command(struct inode inode, struct file file,
	142	struct gendisk *disk, unsigned int cmd, unsigned long arg)
	143	{
	144	struct cdrom_generic_command __user *cgc;
	145	struct compat_cdrom_generic_command __user *cgc32;
	146	u32 data;
	147	unsigned char dir;
	148	int itmp;
	149
	150	cgc = compat_alloc_user_space(sizeof(*cgc));
	151	cgc32 = compat_ptr(arg);
	152
	153	if (copy_in_user(&cgc->cmd, &cgc32->cmd, sizeof(cgc->cmd)) \|\|
	154	get_user(data, &cgc32->buffer) \|\|
	155	put_user(compat_ptr(data), &cgc->buffer) \|\|
	156	copy_in_user(&cgc->buflen, &cgc32->buflen,
	157	(sizeof(unsigned int) + sizeof(int))) \|\|
	158	get_user(data, &cgc32->sense) \|\|
159	put_user(compat_ptr(data), &cgc->sense) \|\|
160	get_user(dir, &cgc32->data_direction) \|\|
161	put_user(dir, &cgc->data_direction) \|\|
162	get_user(itmp, &cgc32->quiet) \|\|
163	put_user(itmp, &cgc->quiet) \|\|
164	get_user(itmp, &cgc32->timeout) \|\|
165	put_user(itmp, &cgc->timeout) \|\|
166	get_user(data, &cgc32->reserved[0]) \|\|
167	put_user(compat_ptr(data), &cgc->reserved[0]))
168	return -EFAULT;
169
170	return blkdev_driver_ioctl(inode, file, disk, cmd, (unsigned long)cgc);
171	}
172
18cf7f87 AB	173	struct compat_blkpg_ioctl_arg {
	174	compat_int_t op;
	175	compat_int_t flags;
	176	compat_int_t datalen;
	177	compat_caddr_t data;
	178	};
	179
	180	static int compat_blkpg_ioctl(struct inode inode, struct file file,
	181	unsigned int cmd, struct compat_blkpg_ioctl_arg __user *ua32)
	182	{
	183	struct blkpg_ioctl_arg __user a = compat_alloc_user_space(sizeof(a));
	184	compat_caddr_t udata;
	185	compat_int_t n;
	186	int err;
	187
	188	err = get_user(n, &ua32->op);
	189	err \|= put_user(n, &a->op);
	190	err \|= get_user(n, &ua32->flags);
	191	err \|= put_user(n, &a->flags);
	192	err \|= get_user(n, &ua32->datalen);
	193	err \|= put_user(n, &a->datalen);
	194	err \|= get_user(udata, &ua32->data);
	195	err \|= put_user(compat_ptr(udata), &a->data);
	196	if (err)
	197	return err;
	198
	199	return blkdev_ioctl(inode, file, cmd, (unsigned long)a);
	200	}
	201
f58c4c0a AB	202	#define BLKBSZGET_32 _IOR(0x12, 112, int)
	203	#define BLKBSZSET_32 _IOW(0x12, 113, int)
	204	#define BLKGETSIZE64_32 _IOR(0x12, 114, int)
	205
171044d4 AB	206	struct compat_blk_user_trace_setup {
	207	char name[32];
	208	u16 act_mask;
	209	u32 buf_size;
	210	u32 buf_nr;
	211	compat_u64 start_lba;
	212	compat_u64 end_lba;
	213	u32 pid;
	214	};
	215	#define BLKTRACESETUP32 _IOWR(0x12, 115, struct compat_blk_user_trace_setup)
	216
	217	static int compat_blk_trace_setup(struct block_device bdev, char __user arg)
	218	{
	219	struct blk_user_trace_setup buts;
	220	struct compat_blk_user_trace_setup cbuts;
	221	struct request_queue *q;
	222	int ret;
	223
	224	q = bdev_get_queue(bdev);
	225	if (!q)
	226	return -ENXIO;
	227
	228	if (copy_from_user(&cbuts, arg, sizeof(cbuts)))
	229	return -EFAULT;
	230
	231	buts = (struct blk_user_trace_setup) {
	232	.act_mask = cbuts.act_mask,
	233	.buf_size = cbuts.buf_size,
	234	.buf_nr = cbuts.buf_nr,
	235	.start_lba = cbuts.start_lba,
	236	.end_lba = cbuts.end_lba,
	237	.pid = cbuts.pid,
	238	};
	239	memcpy(&buts.name, &cbuts.name, 32);
	240
	241	mutex_lock(&bdev->bd_mutex);
	242	ret = do_blk_trace_setup(q, bdev, &buts);
	243	mutex_unlock(&bdev->bd_mutex);
	244	if (ret)
	245	return ret;
	246
	247	if (copy_to_user(arg, &buts.name, 32))
	248	return -EFAULT;
	249
	250	return 0;
	251	}
	252
7199d4cd AB	253	static int compat_blkdev_driver_ioctl(struct inode inode, struct file file,
	254	struct gendisk *disk, unsigned cmd, unsigned long arg)
	255	{
	256	int ret;
	257
	258	switch (arg) {
9617db08 AB	259	case HDIO_GET_UNMASKINTR:
	260	case HDIO_GET_MULTCOUNT:
	261	case HDIO_GET_KEEPSETTINGS:
	262	case HDIO_GET_32BIT:
	263	case HDIO_GET_NOWERR:
	264	case HDIO_GET_DMA:
	265	case HDIO_GET_NICE:
	266	case HDIO_GET_WCACHE:
	267	case HDIO_GET_ACOUSTIC:
	268	case HDIO_GET_ADDRESS:
	269	case HDIO_GET_BUSSTATE:
	270	return compat_hdio_ioctl(inode, file, disk, cmd, arg);
b3087cc4 AB	271	case CDROMREADAUDIO:
	272	return compat_cdrom_read_audio(inode, file, disk, cmd, arg);
	273	case CDROM_SEND_PACKET:
	274	return compat_cdrom_generic_command(inode, file, disk, cmd, arg);
	275
7199d4cd AB	276	/*
	277	* No handler required for the ones below, we just need to
	278	* convert arg to a 64 bit pointer.
	279	*/
	280	case BLKSECTSET:
	281	/*
	282	* 0x03 -- HD/IDE ioctl's used by hdparm and friends.
	283	* Some need translations, these do not.
	284	*/
	285	case HDIO_GET_IDENTITY:
	286	case HDIO_DRIVE_TASK:
	287	case HDIO_DRIVE_CMD:
	288	case HDIO_SCAN_HWIF:
	289	/* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */
	290	case 0x330:
	291	/* 0x02 -- Floppy ioctls */
	292	case FDMSGON:
	293	case FDMSGOFF:
	294	case FDSETEMSGTRESH:
	295	case FDFLUSH:
	296	case FDWERRORCLR:
	297	case FDSETMAXERRS:
	298	case FDGETMAXERRS:
	299	case FDGETDRVTYP:
	300	case FDEJECT:
	301	case FDCLRPRM:
	302	case FDFMTBEG:
	303	case FDFMTEND:
	304	case FDRESET:
	305	case FDTWADDLE:
	306	case FDFMTTRK:
	307	case FDRAWCMD:
	308	/* CDROM stuff */
	309	case CDROMPAUSE:
	310	case CDROMRESUME:
	311	case CDROMPLAYMSF:
	312	case CDROMPLAYTRKIND:
	313	case CDROMREADTOCHDR:
	314	case CDROMREADTOCENTRY:
	315	case CDROMSTOP:
	316	case CDROMSTART:
	317	case CDROMEJECT:
	318	case CDROMVOLCTRL:
	319	case CDROMSUBCHNL:
	320	case CDROMMULTISESSION:
	321	case CDROM_GET_MCN:
	322	case CDROMRESET:
	323	case CDROMVOLREAD:
	324	case CDROMSEEK:
	325	case CDROMPLAYBLK:
	326	case CDROMCLOSETRAY:
	327	case CDROM_DISC_STATUS:
	328	case CDROM_CHANGER_NSLOTS:
	329	case CDROM_GET_CAPABILITY:
	330	/* Ignore cdrom.h about these next 5 ioctls, they absolutely do
	331	* not take a struct cdrom_read, instead they take a struct cdrom_msf
	332	* which is compatible.
	333	*/
	334	case CDROMREADMODE2:
	335	case CDROMREADMODE1:
	336	case CDROMREADRAW:
	337	case CDROMREADCOOKED:
	338	case CDROMREADALL:
	339	/* DVD ioctls */
340	case DVD_READ_STRUCT:
341	case DVD_WRITE_STRUCT:
342	case DVD_AUTH:
343	arg = (unsigned long)compat_ptr(arg);
344	/* These intepret arg as an unsigned long, not as a pointer,
345	* so we must not do compat_ptr() conversion. */
346	case HDIO_SET_MULTCOUNT:
347	case HDIO_SET_UNMASKINTR:
348	case HDIO_SET_KEEPSETTINGS:
349	case HDIO_SET_32BIT:
350	case HDIO_SET_NOWERR:
351	case HDIO_SET_DMA:
352	case HDIO_SET_PIO_MODE:
353	case HDIO_SET_NICE:
354	case HDIO_SET_WCACHE:
355	case HDIO_SET_ACOUSTIC:
356	case HDIO_SET_BUSSTATE:
357	case HDIO_SET_ADDRESS:
358	case CDROMEJECT_SW:
359	case CDROM_SET_OPTIONS:
360	case CDROM_CLEAR_OPTIONS:
361	case CDROM_SELECT_SPEED:
362	case CDROM_SELECT_DISC:
363	case CDROM_MEDIA_CHANGED:
364	case CDROM_DRIVE_STATUS:
365	case CDROM_LOCKDOOR:
366	case CDROM_DEBUG:
367	break;
368	default:
369	/* unknown ioctl number */
370	return -ENOIOCTLCMD;
371	}
372
373	if (disk->fops->unlocked_ioctl)
374	return disk->fops->unlocked_ioctl(file, cmd, arg);
375
376	if (disk->fops->ioctl) {
377	lock_kernel();
378	ret = disk->fops->ioctl(inode, file, cmd, arg);
379	unlock_kernel();
380	return ret;
381	}
382
383	return -ENOTTY;
384	}
385
f58c4c0a AB	386	static int compat_blkdev_locked_ioctl(struct inode inode, struct file file,
	387	struct block_device *bdev,
	388	unsigned cmd, unsigned long arg)
	389	{
	390	struct backing_dev_info *bdi;
	391
	392	switch (cmd) {
	393	case BLKRAGET:
	394	case BLKFRAGET:
	395	if (!arg)
	396	return -EINVAL;
	397	bdi = blk_get_backing_dev_info(bdev);
	398	if (bdi == NULL)
	399	return -ENOTTY;
	400	return compat_put_long(arg,
	401	(bdi->ra_pages * PAGE_CACHE_SIZE) / 512);
	402	case BLKROGET: /* compatible */
	403	return compat_put_int(arg, bdev_read_only(bdev) != 0);
	404	case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
	405	return compat_put_int(arg, block_size(bdev));
	406	case BLKSSZGET: /* get block device hardware sector size */
	407	return compat_put_int(arg, bdev_hardsect_size(bdev));
	408	case BLKSECTGET:
	409	return compat_put_ushort(arg,
	410	bdev_get_queue(bdev)->max_sectors);
	411	case BLKRASET: /* compatible, but no compat_ptr (!) */
	412	case BLKFRASET:
	413	if (!capable(CAP_SYS_ADMIN))
	414	return -EACCES;
	415	bdi = blk_get_backing_dev_info(bdev);
	416	if (bdi == NULL)
	417	return -ENOTTY;
	418	bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;
	419	return 0;
	420	case BLKGETSIZE:
	421	if ((bdev->bd_inode->i_size >> 9) > ~0UL)
	422	return -EFBIG;
	423	return compat_put_ulong(arg, bdev->bd_inode->i_size >> 9);
	424
	425	case BLKGETSIZE64_32:
	426	return compat_put_u64(arg, bdev->bd_inode->i_size);
171044d4 AB	427
	428	case BLKTRACESETUP32:
	429	return compat_blk_trace_setup(bdev, compat_ptr(arg));
	430	case BLKTRACESTART: /* compatible */
	431	case BLKTRACESTOP: /* compatible */
	432	case BLKTRACETEARDOWN: /* compatible */
	433	return blk_trace_ioctl(bdev, cmd, compat_ptr(arg));
f58c4c0a AB	434	}
	435	return -ENOIOCTLCMD;
	436	}
	437
	438	/* Most of the generic ioctls are handled in the normal fallback path.
	439	This assumes the blkdev's low level compat_ioctl always returns
	440	ENOIOCTLCMD for unknown ioctls. */
	441	long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
	442	{
	443	int ret = -ENOIOCTLCMD;
	444	struct inode *inode = file->f_mapping->host;
	445	struct block_device *bdev = inode->i_bdev;
	446	struct gendisk *disk = bdev->bd_disk;
	447
	448	switch (cmd) {
9617db08 AB	449	case HDIO_GETGEO:
9617db08 AB	450	return compat_hdio_getgeo(disk, bdev, compat_ptr(arg));
f58c4c0a AB	451	case BLKFLSBUF:
	452	case BLKROSET:
	453	/*
	454	* the ones below are implemented in blkdev_locked_ioctl,
	455	* but we call blkdev_ioctl, which gets the lock for us
	456	*/
	457	case BLKRRPART:
	458	return blkdev_ioctl(inode, file, cmd,
	459	(unsigned long)compat_ptr(arg));
	460	case BLKBSZSET_32:
	461	return blkdev_ioctl(inode, file, BLKBSZSET,
	462	(unsigned long)compat_ptr(arg));
18cf7f87 AB	463	case BLKPG:
18cf7f87 AB	464	return compat_blkpg_ioctl(inode, file, cmd, compat_ptr(arg));
f58c4c0a AB	465	}
	466
	467	lock_kernel();
	468	ret = compat_blkdev_locked_ioctl(inode, file, bdev, cmd, arg);
	469	/* FIXME: why do we assume -> compat_ioctl needs the BKL? */
	470	if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
	471	ret = disk->fops->compat_ioctl(file, cmd, arg);
	472	unlock_kernel();
	473
7199d4cd AB	474	if (ret != -ENOIOCTLCMD)
	475	return ret;
	476
	477	return compat_blkdev_driver_ioctl(inode, file, disk, cmd, arg);
f58c4c0a	478	}