[net-next-2.6.git] / fs / ioctl.c

/*
 *  linux/fs/ioctl.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 */

#include <linux/syscalls.h>
#include <linux/mm.h>
#include <linux/smp_lock.h>
#include <linux/capability.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/security.h>
#include <linux/module.h>
#include <linux/uaccess.h>

#include <asm/ioctls.h>

/* So that the fiemap access checks can't overflow on 32 bit machines. */
#define FIEMAP_MAX_EXTENTS	(UINT_MAX / sizeof(struct fiemap_extent))

/**
 * vfs_ioctl - call filesystem specific ioctl methods
 * @filp:	open file to invoke ioctl method on
 * @cmd:	ioctl command to execute
 * @arg:	command-specific argument for ioctl
 *
 * Invokes filesystem specific ->unlocked_ioctl, if one exists; otherwise
 * invokes filesystem specific ->ioctl method.  If neither method exists,
 * returns -ENOTTY.
 *
 * Returns 0 on success, -errno on error.
 */
static long vfs_ioctl(struct file *filp, unsigned int cmd,
		      unsigned long arg)
{
	int error = -ENOTTY;

	if (!filp->f_op)
		goto out;

	if (filp->f_op->unlocked_ioctl) {
		error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
		if (error == -ENOIOCTLCMD)
			error = -EINVAL;
		goto out;
	} else if (filp->f_op->ioctl) {
		lock_kernel();
		error = filp->f_op->ioctl(filp->f_path.dentry->d_inode,
					  filp, cmd, arg);
		unlock_kernel();
	}

 out:
	return error;
}

static int ioctl_fibmap(struct file *filp, int __user *p)
{
	struct address_space *mapping = filp->f_mapping;
	int res, block;

	/* do we support this mess? */
	if (!mapping->a_ops->bmap)
		return -EINVAL;
	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;
	res = get_user(block, p);
	if (res)
		return res;
	lock_kernel();
	res = mapping->a_ops->bmap(mapping, block);
	unlock_kernel();
	return put_user(res, p);
}

/**
 * fiemap_fill_next_extent - Fiemap helper function
 * @fieinfo:	Fiemap context passed into ->fiemap
 * @logical:	Extent logical start offset, in bytes
 * @phys:	Extent physical start offset, in bytes
 * @len:	Extent length, in bytes
 * @flags:	FIEMAP_EXTENT flags that describe this extent
 *
 * Called from file system ->fiemap callback. Will populate extent
 * info as passed in via arguments and copy to user memory. On
 * success, extent count on fieinfo is incremented.
 *
 * Returns 0 on success, -errno on error, 1 if this was the last
 * extent that will fit in user array.
 */
#define SET_UNKNOWN_FLAGS	(FIEMAP_EXTENT_DELALLOC)
#define SET_NO_UNMOUNTED_IO_FLAGS	(FIEMAP_EXTENT_DATA_ENCRYPTED)
#define SET_NOT_ALIGNED_FLAGS	(FIEMAP_EXTENT_DATA_TAIL|FIEMAP_EXTENT_DATA_INLINE)
int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical,
			    u64 phys, u64 len, u32 flags)
{
	struct fiemap_extent extent;
	struct fiemap_extent *dest = fieinfo->fi_extents_start;

	/* only count the extents */
	if (fieinfo->fi_extents_max == 0) {
		fieinfo->fi_extents_mapped++;
		return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0;
	}

	if (fieinfo->fi_extents_mapped >= fieinfo->fi_extents_max)
		return 1;

	if (flags & SET_UNKNOWN_FLAGS)
		flags |= FIEMAP_EXTENT_UNKNOWN;
	if (flags & SET_NO_UNMOUNTED_IO_FLAGS)
		flags |= FIEMAP_EXTENT_ENCODED;
	if (flags & SET_NOT_ALIGNED_FLAGS)
		flags |= FIEMAP_EXTENT_NOT_ALIGNED;

	memset(&extent, 0, sizeof(extent));
	extent.fe_logical = logical;
	extent.fe_physical = phys;
	extent.fe_length = len;
	extent.fe_flags = flags;

	dest += fieinfo->fi_extents_mapped;
	if (copy_to_user(dest, &extent, sizeof(extent)))
		return -EFAULT;

	fieinfo->fi_extents_mapped++;
	if (fieinfo->fi_extents_mapped == fieinfo->fi_extents_max)
		return 1;
	return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0;
}
EXPORT_SYMBOL(fiemap_fill_next_extent);

/**
 * fiemap_check_flags - check validity of requested flags for fiemap
 * @fieinfo:	Fiemap context passed into ->fiemap
 * @fs_flags:	Set of fiemap flags that the file system understands
 *
 * Called from file system ->fiemap callback. This will compute the
 * intersection of valid fiemap flags and those that the fs supports. That
 * value is then compared against the user supplied flags. In case of bad user
 * flags, the invalid values will be written into the fieinfo structure, and
 * -EBADR is returned, which tells ioctl_fiemap() to return those values to
 * userspace. For this reason, a return code of -EBADR should be preserved.
 *
 * Returns 0 on success, -EBADR on bad flags.
 */
int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags)
{
	u32 incompat_flags;

	incompat_flags = fieinfo->fi_flags & ~(FIEMAP_FLAGS_COMPAT & fs_flags);
	if (incompat_flags) {
		fieinfo->fi_flags = incompat_flags;
		return -EBADR;
	}
	return 0;
}
EXPORT_SYMBOL(fiemap_check_flags);

static int fiemap_check_ranges(struct super_block *sb,
			       u64 start, u64 len, u64 *new_len)
{
	*new_len = len;

	if (len == 0)
		return -EINVAL;

	if (start > sb->s_maxbytes)
		return -EFBIG;

	/*
	 * Shrink request scope to what the fs can actually handle.
	 */
	if ((len > sb->s_maxbytes) ||
	    (sb->s_maxbytes - len) < start)
		*new_len = sb->s_maxbytes - start;

	return 0;
}

static int ioctl_fiemap(struct file *filp, unsigned long arg)
{
	struct fiemap fiemap;
	struct fiemap_extent_info fieinfo = { 0, };
	struct inode *inode = filp->f_path.dentry->d_inode;
	struct super_block *sb = inode->i_sb;
	u64 len;
	int error;

	if (!inode->i_op->fiemap)
		return -EOPNOTSUPP;

	if (copy_from_user(&fiemap, (struct fiemap __user *)arg,
			   sizeof(struct fiemap)))
		return -EFAULT;

	if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
		return -EINVAL;

	error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length,
				    &len);
	if (error)
		return error;

	fieinfo.fi_flags = fiemap.fm_flags;
	fieinfo.fi_extents_max = fiemap.fm_extent_count;
	fieinfo.fi_extents_start = (struct fiemap_extent *)(arg + sizeof(fiemap));

	if (fiemap.fm_extent_count != 0 &&
	    !access_ok(VERIFY_WRITE, fieinfo.fi_extents_start,
		       fieinfo.fi_extents_max * sizeof(struct fiemap_extent)))
		return -EFAULT;

	if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
		filemap_write_and_wait(inode->i_mapping);

	error = inode->i_op->fiemap(inode, &fieinfo, fiemap.fm_start, len);
	fiemap.fm_flags = fieinfo.fi_flags;
	fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
	if (copy_to_user((char *)arg, &fiemap, sizeof(fiemap)))
		error = -EFAULT;

	return error;
}

static int file_ioctl(struct file *filp, unsigned int cmd,
		unsigned long arg)
{
	struct inode *inode = filp->f_path.dentry->d_inode;
	int __user *p = (int __user *)arg;

	switch (cmd) {
	case FIBMAP:
		return ioctl_fibmap(filp, p);
	case FS_IOC_FIEMAP:
		return ioctl_fiemap(filp, arg);
	case FIGETBSZ:
		return put_user(inode->i_sb->s_blocksize, p);
	case FIONREAD:
		return put_user(i_size_read(inode) - filp->f_pos, p);
	}

	return vfs_ioctl(filp, cmd, arg);
}

static int ioctl_fionbio(struct file *filp, int __user *argp)
{
	unsigned int flag;
	int on, error;

	error = get_user(on, argp);
	if (error)
		return error;
	flag = O_NONBLOCK;
#ifdef __sparc__
	/* SunOS compatibility item. */
	if (O_NONBLOCK != O_NDELAY)
		flag |= O_NDELAY;
#endif
	if (on)
		filp->f_flags |= flag;
	else
		filp->f_flags &= ~flag;
	return error;
}

static int ioctl_fioasync(unsigned int fd, struct file *filp,
			  int __user *argp)
{
	unsigned int flag;
	int on, error;

	error = get_user(on, argp);
	if (error)
		return error;
	flag = on ? FASYNC : 0;

	/* Did FASYNC state change ? */
	if ((flag ^ filp->f_flags) & FASYNC) {
		if (filp->f_op && filp->f_op->fasync) {
			lock_kernel();
			error = filp->f_op->fasync(fd, filp, on);
			unlock_kernel();
		} else
			error = -ENOTTY;
	}
	if (error)
		return error;

	if (on)
		filp->f_flags |= FASYNC;
	else
		filp->f_flags &= ~FASYNC;
	return error;
}

/*
 * When you add any new common ioctls to the switches above and below
 * please update compat_sys_ioctl() too.
 *
 * do_vfs_ioctl() is not for drivers and not intended to be EXPORT_SYMBOL()'d.
 * It's just a simple helper for sys_ioctl and compat_sys_ioctl.
 */
int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
	     unsigned long arg)
{
	int error = 0;
	int __user *argp = (int __user *)arg;

	switch (cmd) {
	case FIOCLEX:
		set_close_on_exec(fd, 1);
		break;

	case FIONCLEX:
		set_close_on_exec(fd, 0);
		break;

	case FIONBIO:
		error = ioctl_fionbio(filp, argp);
		break;

	case FIOASYNC:
		error = ioctl_fioasync(fd, filp, argp);
		break;

	case FIOQSIZE:
		if (S_ISDIR(filp->f_path.dentry->d_inode->i_mode) ||
		    S_ISREG(filp->f_path.dentry->d_inode->i_mode) ||
		    S_ISLNK(filp->f_path.dentry->d_inode->i_mode)) {
			loff_t res =
				inode_get_bytes(filp->f_path.dentry->d_inode);
			error = copy_to_user((loff_t __user *)arg, &res,
					     sizeof(res)) ? -EFAULT : 0;
		} else
			error = -ENOTTY;
		break;
	default:
		if (S_ISREG(filp->f_path.dentry->d_inode->i_mode))
			error = file_ioctl(filp, cmd, arg);
		else
			error = vfs_ioctl(filp, cmd, arg);
		break;
	}
	return error;
}

asmlinkage long sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct file *filp;
	int error = -EBADF;
	int fput_needed;

	filp = fget_light(fd, &fput_needed);
	if (!filp)
		goto out;

	error = security_file_ioctl(filp, cmd, arg);
	if (error)
		goto out_fput;

	error = do_vfs_ioctl(filp, fd, cmd, arg);
 out_fput:
	fput_light(filp, fput_needed);
 out:
	return error;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/ioctl.c
	3	*
	4	* Copyright (C) 1991, 1992 Linus Torvalds
	5	*/
	6
1da177e4 LT	7	#include <linux/syscalls.h>
	8	#include <linux/mm.h>
	9	#include <linux/smp_lock.h>
16f7e0fe	10	#include <linux/capability.h>
1da177e4 LT	11	#include <linux/file.h>
	12	#include <linux/fs.h>
	13	#include <linux/security.h>
	14	#include <linux/module.h>
c9845ff1	15	#include <linux/uaccess.h>
1da177e4	16
1da177e4 LT	17	#include <asm/ioctls.h>
1da177e4 LT	18
c4b929b8 MF	19	/* So that the fiemap access checks can't overflow on 32 bit machines. */
	20	#define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
	21
deb21db7 EZ	22	/**
deb21db7 EZ	23	* vfs_ioctl - call filesystem specific ioctl methods
f6a4c8bd CH	24	* @filp: open file to invoke ioctl method on
	25	* @cmd: ioctl command to execute
	26	* @arg: command-specific argument for ioctl
deb21db7 EZ	27	*
deb21db7 EZ	28	* Invokes filesystem specific ->unlocked_ioctl, if one exists; otherwise
f6a4c8bd	29	* invokes filesystem specific ->ioctl method. If neither method exists,
deb21db7 EZ	30	* returns -ENOTTY.
	31	*
	32	* Returns 0 on success, -errno on error.
	33	*/
67cde595 AB	34	static long vfs_ioctl(struct file *filp, unsigned int cmd,
67cde595 AB	35	unsigned long arg)
1da177e4 LT	36	{
	37	int error = -ENOTTY;
	38
	39	if (!filp->f_op)
	40	goto out;
	41
	42	if (filp->f_op->unlocked_ioctl) {
	43	error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
	44	if (error == -ENOIOCTLCMD)
	45	error = -EINVAL;
	46	goto out;
64d67d21	47	} else if (filp->f_op->ioctl) {
1da177e4	48	lock_kernel();
64d67d21 AM	49	error = filp->f_op->ioctl(filp->f_path.dentry->d_inode,
64d67d21 AM	50	filp, cmd, arg);
1da177e4 LT	51	unlock_kernel();
	52	}
	53
	54	out:
	55	return error;
	56	}
	57
aa81a7c7 EZ	58	static int ioctl_fibmap(struct file filp, int __user p)
	59	{
	60	struct address_space *mapping = filp->f_mapping;
	61	int res, block;
	62
	63	/* do we support this mess? */
	64	if (!mapping->a_ops->bmap)
	65	return -EINVAL;
	66	if (!capable(CAP_SYS_RAWIO))
	67	return -EPERM;
	68	res = get_user(block, p);
	69	if (res)
	70	return res;
	71	lock_kernel();
	72	res = mapping->a_ops->bmap(mapping, block);
	73	unlock_kernel();
	74	return put_user(res, p);
	75	}
	76
c4b929b8 MF	77	/**
	78	* fiemap_fill_next_extent - Fiemap helper function
	79	* @fieinfo: Fiemap context passed into ->fiemap
	80	* @logical: Extent logical start offset, in bytes
	81	* @phys: Extent physical start offset, in bytes
	82	* @len: Extent length, in bytes
	83	* @flags: FIEMAP_EXTENT flags that describe this extent
	84	*
	85	* Called from file system ->fiemap callback. Will populate extent
	86	* info as passed in via arguments and copy to user memory. On
	87	* success, extent count on fieinfo is incremented.
	88	*
	89	* Returns 0 on success, -errno on error, 1 if this was the last
	90	* extent that will fit in user array.
	91	*/
	92	#define SET_UNKNOWN_FLAGS (FIEMAP_EXTENT_DELALLOC)
	93	#define SET_NO_UNMOUNTED_IO_FLAGS (FIEMAP_EXTENT_DATA_ENCRYPTED)
	94	#define SET_NOT_ALIGNED_FLAGS (FIEMAP_EXTENT_DATA_TAIL\|FIEMAP_EXTENT_DATA_INLINE)
	95	int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical,
	96	u64 phys, u64 len, u32 flags)
	97	{
	98	struct fiemap_extent extent;
	99	struct fiemap_extent *dest = fieinfo->fi_extents_start;
	100
	101	/* only count the extents */
	102	if (fieinfo->fi_extents_max == 0) {
	103	fieinfo->fi_extents_mapped++;
	104	return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0;
	105	}
	106
	107	if (fieinfo->fi_extents_mapped >= fieinfo->fi_extents_max)
	108	return 1;
	109
	110	if (flags & SET_UNKNOWN_FLAGS)
	111	flags \|= FIEMAP_EXTENT_UNKNOWN;
	112	if (flags & SET_NO_UNMOUNTED_IO_FLAGS)
	113	flags \|= FIEMAP_EXTENT_ENCODED;
	114	if (flags & SET_NOT_ALIGNED_FLAGS)
	115	flags \|= FIEMAP_EXTENT_NOT_ALIGNED;
	116
	117	memset(&extent, 0, sizeof(extent));
	118	extent.fe_logical = logical;
	119	extent.fe_physical = phys;
	120	extent.fe_length = len;
	121	extent.fe_flags = flags;
	122
	123	dest += fieinfo->fi_extents_mapped;
	124	if (copy_to_user(dest, &extent, sizeof(extent)))
	125	return -EFAULT;
	126
	127	fieinfo->fi_extents_mapped++;
	128	if (fieinfo->fi_extents_mapped == fieinfo->fi_extents_max)
	129	return 1;
	130	return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0;
	131	}
	132	EXPORT_SYMBOL(fiemap_fill_next_extent);
	133
	134	/**
	135	* fiemap_check_flags - check validity of requested flags for fiemap
	136	* @fieinfo: Fiemap context passed into ->fiemap
	137	* @fs_flags: Set of fiemap flags that the file system understands
	138	*
	139	* Called from file system ->fiemap callback. This will compute the
	140	* intersection of valid fiemap flags and those that the fs supports. That
141	* value is then compared against the user supplied flags. In case of bad user
142	* flags, the invalid values will be written into the fieinfo structure, and
143	* -EBADR is returned, which tells ioctl_fiemap() to return those values to
144	* userspace. For this reason, a return code of -EBADR should be preserved.
145	*
146	* Returns 0 on success, -EBADR on bad flags.
147	*/
148	int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags)
149	{
150	u32 incompat_flags;
151
152	incompat_flags = fieinfo->fi_flags & ~(FIEMAP_FLAGS_COMPAT & fs_flags);
153	if (incompat_flags) {
154	fieinfo->fi_flags = incompat_flags;
155	return -EBADR;
156	}
157	return 0;
158	}
159	EXPORT_SYMBOL(fiemap_check_flags);
160
161	static int fiemap_check_ranges(struct super_block *sb,
162	u64 start, u64 len, u64 *new_len)
163	{
164	*new_len = len;
165
166	if (len == 0)
167	return -EINVAL;
168
169	if (start > sb->s_maxbytes)
170	return -EFBIG;
171
172	/*
173	* Shrink request scope to what the fs can actually handle.
174	*/
175	if ((len > sb->s_maxbytes) \|\|
176	(sb->s_maxbytes - len) < start)
177	*new_len = sb->s_maxbytes - start;
178
179	return 0;
180	}
181
182	static int ioctl_fiemap(struct file *filp, unsigned long arg)
183	{
184	struct fiemap fiemap;
185	struct fiemap_extent_info fieinfo = { 0, };
186	struct inode *inode = filp->f_path.dentry->d_inode;
187	struct super_block *sb = inode->i_sb;
188	u64 len;
189	int error;
190
191	if (!inode->i_op->fiemap)
192	return -EOPNOTSUPP;
193
194	if (copy_from_user(&fiemap, (struct fiemap __user *)arg,
195	sizeof(struct fiemap)))
196	return -EFAULT;
197
198	if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
199	return -EINVAL;
200
201	error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length,
202	&len);
203	if (error)
204	return error;
205
206	fieinfo.fi_flags = fiemap.fm_flags;
207	fieinfo.fi_extents_max = fiemap.fm_extent_count;
208	fieinfo.fi_extents_start = (struct fiemap_extent *)(arg + sizeof(fiemap));
209
210	if (fiemap.fm_extent_count != 0 &&
211	!access_ok(VERIFY_WRITE, fieinfo.fi_extents_start,
212	fieinfo.fi_extents_max * sizeof(struct fiemap_extent)))
213	return -EFAULT;
214
215	if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
216	filemap_write_and_wait(inode->i_mapping);
217
218	error = inode->i_op->fiemap(inode, &fieinfo, fiemap.fm_start, len);
219	fiemap.fm_flags = fieinfo.fi_flags;
220	fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
221	if (copy_to_user((char *)arg, &fiemap, sizeof(fiemap)))
222	error = -EFAULT;
223
224	return error;
225	}
226
1da177e4 LT	227	static int file_ioctl(struct file *filp, unsigned int cmd,
	228	unsigned long arg)
	229	{
c9845ff1	230	struct inode *inode = filp->f_path.dentry->d_inode;
1da177e4 LT	231	int __user p = (int __user )arg;
	232
	233	switch (cmd) {
c9845ff1	234	case FIBMAP:
aa81a7c7	235	return ioctl_fibmap(filp, p);
c4b929b8 MF	236	case FS_IOC_FIEMAP:
c4b929b8 MF	237	return ioctl_fiemap(filp, arg);
c9845ff1 EZ	238	case FIGETBSZ:
	239	return put_user(inode->i_sb->s_blocksize, p);
	240	case FIONREAD:
	241	return put_user(i_size_read(inode) - filp->f_pos, p);
1da177e4 LT	242	}
1da177e4 LT	243
deb21db7	244	return vfs_ioctl(filp, cmd, arg);
1da177e4 LT	245	}
1da177e4 LT	246
aa81a7c7 EZ	247	static int ioctl_fionbio(struct file filp, int __user argp)
	248	{
	249	unsigned int flag;
	250	int on, error;
	251
	252	error = get_user(on, argp);
	253	if (error)
	254	return error;
	255	flag = O_NONBLOCK;
	256	#ifdef __sparc__
	257	/* SunOS compatibility item. */
	258	if (O_NONBLOCK != O_NDELAY)
	259	flag \|= O_NDELAY;
	260	#endif
	261	if (on)
	262	filp->f_flags \|= flag;
	263	else
	264	filp->f_flags &= ~flag;
	265	return error;
	266	}
	267
	268	static int ioctl_fioasync(unsigned int fd, struct file *filp,
	269	int __user *argp)
	270	{
	271	unsigned int flag;
	272	int on, error;
	273
	274	error = get_user(on, argp);
	275	if (error)
	276	return error;
	277	flag = on ? FASYNC : 0;
	278
	279	/* Did FASYNC state change ? */
	280	if ((flag ^ filp->f_flags) & FASYNC) {
	281	if (filp->f_op && filp->f_op->fasync) {
	282	lock_kernel();
	283	error = filp->f_op->fasync(fd, filp, on);
	284	unlock_kernel();
	285	} else
	286	error = -ENOTTY;
	287	}
	288	if (error)
	289	return error;
	290
	291	if (on)
	292	filp->f_flags \|= FASYNC;
	293	else
	294	filp->f_flags &= ~FASYNC;
	295	return error;
	296	}
	297
1da177e4 LT	298	/*
	299	* When you add any new common ioctls to the switches above and below
	300	* please update compat_sys_ioctl() too.
	301	*
deb21db7	302	* do_vfs_ioctl() is not for drivers and not intended to be EXPORT_SYMBOL()'d.
1da177e4 LT	303	* It's just a simple helper for sys_ioctl and compat_sys_ioctl.
1da177e4 LT	304	*/
deb21db7 EZ	305	int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
deb21db7 EZ	306	unsigned long arg)
1da177e4	307	{
aa81a7c7 EZ	308	int error = 0;
aa81a7c7 EZ	309	int __user argp = (int __user )arg;
1da177e4 LT	310
1da177e4 LT	311	switch (cmd) {
c9845ff1 EZ	312	case FIOCLEX:
	313	set_close_on_exec(fd, 1);
	314	break;
1da177e4	315
c9845ff1 EZ	316	case FIONCLEX:
	317	set_close_on_exec(fd, 0);
	318	break;
1da177e4	319
c9845ff1	320	case FIONBIO:
aa81a7c7	321	error = ioctl_fionbio(filp, argp);
c9845ff1 EZ	322	break;
	323
	324	case FIOASYNC:
aa81a7c7	325	error = ioctl_fioasync(fd, filp, argp);
c9845ff1 EZ	326	break;
	327
	328	case FIOQSIZE:
	329	if (S_ISDIR(filp->f_path.dentry->d_inode->i_mode) \|\|
	330	S_ISREG(filp->f_path.dentry->d_inode->i_mode) \|\|
	331	S_ISLNK(filp->f_path.dentry->d_inode->i_mode)) {
	332	loff_t res =
	333	inode_get_bytes(filp->f_path.dentry->d_inode);
	334	error = copy_to_user((loff_t __user *)arg, &res,
	335	sizeof(res)) ? -EFAULT : 0;
	336	} else
	337	error = -ENOTTY;
	338	break;
	339	default:
	340	if (S_ISREG(filp->f_path.dentry->d_inode->i_mode))
	341	error = file_ioctl(filp, cmd, arg);
	342	else
deb21db7	343	error = vfs_ioctl(filp, cmd, arg);
c9845ff1	344	break;
1da177e4 LT	345	}
	346	return error;
	347	}
	348
	349	asmlinkage long sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
	350	{
c9845ff1	351	struct file *filp;
1da177e4 LT	352	int error = -EBADF;
	353	int fput_needed;
	354
	355	filp = fget_light(fd, &fput_needed);
	356	if (!filp)
	357	goto out;
	358
	359	error = security_file_ioctl(filp, cmd, arg);
	360	if (error)
	361	goto out_fput;
	362
deb21db7	363	error = do_vfs_ioctl(filp, fd, cmd, arg);
1da177e4 LT	364	out_fput:
	365	fput_light(filp, fput_needed);
	366	out:
	367	return error;
	368	}