mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Mike Hommey](/assets/img/avatar_default.png)
Because of an integer overflow on start_blk, various kind of wrong results would be returned by the generic_block_fiemap() handler, such as no extents when there is a 4GB+ hole at the beginning of the file, or wrong fe_logical when an extent starts after the first 4GB. Signed-off-by: Mike Hommey <mh@glandium.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Eric Sandeen <sandeen@sgi.com> Cc: Josef Bacik <jbacik@redhat.com> Cc: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
629 lines
16 KiB
C
629 lines
16 KiB
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 <linux/writeback.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/falloc.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;
|
|
res = mapping->a_ops->bmap(mapping, block);
|
|
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)
|
|
{
|
|
u64 maxbytes = (u64) sb->s_maxbytes;
|
|
|
|
*new_len = len;
|
|
|
|
if (len == 0)
|
|
return -EINVAL;
|
|
|
|
if (start > maxbytes)
|
|
return -EFBIG;
|
|
|
|
/*
|
|
* Shrink request scope to what the fs can actually handle.
|
|
*/
|
|
if (len > maxbytes || (maxbytes - len) < start)
|
|
*new_len = 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;
|
|
}
|
|
|
|
#ifdef CONFIG_BLOCK
|
|
|
|
#define blk_to_logical(inode, blk) (blk << (inode)->i_blkbits)
|
|
#define logical_to_blk(inode, offset) (offset >> (inode)->i_blkbits);
|
|
|
|
/**
|
|
* __generic_block_fiemap - FIEMAP for block based inodes (no locking)
|
|
* @inode - the inode to map
|
|
* @arg - the pointer to userspace where we copy everything to
|
|
* @get_block - the fs's get_block function
|
|
*
|
|
* This does FIEMAP for block based inodes. Basically it will just loop
|
|
* through get_block until we hit the number of extents we want to map, or we
|
|
* go past the end of the file and hit a hole.
|
|
*
|
|
* If it is possible to have data blocks beyond a hole past @inode->i_size, then
|
|
* please do not use this function, it will stop at the first unmapped block
|
|
* beyond i_size.
|
|
*
|
|
* If you use this function directly, you need to do your own locking. Use
|
|
* generic_block_fiemap if you want the locking done for you.
|
|
*/
|
|
|
|
int __generic_block_fiemap(struct inode *inode,
|
|
struct fiemap_extent_info *fieinfo, u64 start,
|
|
u64 len, get_block_t *get_block)
|
|
{
|
|
struct buffer_head tmp;
|
|
unsigned long long start_blk;
|
|
long long length = 0, map_len = 0;
|
|
u64 logical = 0, phys = 0, size = 0;
|
|
u32 flags = FIEMAP_EXTENT_MERGED;
|
|
int ret = 0, past_eof = 0, whole_file = 0;
|
|
|
|
if ((ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC)))
|
|
return ret;
|
|
|
|
start_blk = logical_to_blk(inode, start);
|
|
|
|
length = (long long)min_t(u64, len, i_size_read(inode));
|
|
if (length < len)
|
|
whole_file = 1;
|
|
|
|
map_len = length;
|
|
|
|
do {
|
|
/*
|
|
* we set b_size to the total size we want so it will map as
|
|
* many contiguous blocks as possible at once
|
|
*/
|
|
memset(&tmp, 0, sizeof(struct buffer_head));
|
|
tmp.b_size = map_len;
|
|
|
|
ret = get_block(inode, start_blk, &tmp, 0);
|
|
if (ret)
|
|
break;
|
|
|
|
/* HOLE */
|
|
if (!buffer_mapped(&tmp)) {
|
|
length -= blk_to_logical(inode, 1);
|
|
start_blk++;
|
|
|
|
/*
|
|
* we want to handle the case where there is an
|
|
* allocated block at the front of the file, and then
|
|
* nothing but holes up to the end of the file properly,
|
|
* to make sure that extent at the front gets properly
|
|
* marked with FIEMAP_EXTENT_LAST
|
|
*/
|
|
if (!past_eof &&
|
|
blk_to_logical(inode, start_blk) >=
|
|
blk_to_logical(inode, 0)+i_size_read(inode))
|
|
past_eof = 1;
|
|
|
|
/*
|
|
* first hole after going past the EOF, this is our
|
|
* last extent
|
|
*/
|
|
if (past_eof && size) {
|
|
flags = FIEMAP_EXTENT_MERGED|FIEMAP_EXTENT_LAST;
|
|
ret = fiemap_fill_next_extent(fieinfo, logical,
|
|
phys, size,
|
|
flags);
|
|
break;
|
|
}
|
|
|
|
/* if we have holes up to/past EOF then we're done */
|
|
if (length <= 0 || past_eof)
|
|
break;
|
|
} else {
|
|
/*
|
|
* we have gone over the length of what we wanted to
|
|
* map, and it wasn't the entire file, so add the extent
|
|
* we got last time and exit.
|
|
*
|
|
* This is for the case where say we want to map all the
|
|
* way up to the second to the last block in a file, but
|
|
* the last block is a hole, making the second to last
|
|
* block FIEMAP_EXTENT_LAST. In this case we want to
|
|
* see if there is a hole after the second to last block
|
|
* so we can mark it properly. If we found data after
|
|
* we exceeded the length we were requesting, then we
|
|
* are good to go, just add the extent to the fieinfo
|
|
* and break
|
|
*/
|
|
if (length <= 0 && !whole_file) {
|
|
ret = fiemap_fill_next_extent(fieinfo, logical,
|
|
phys, size,
|
|
flags);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* if size != 0 then we know we already have an extent
|
|
* to add, so add it.
|
|
*/
|
|
if (size) {
|
|
ret = fiemap_fill_next_extent(fieinfo, logical,
|
|
phys, size,
|
|
flags);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
logical = blk_to_logical(inode, start_blk);
|
|
phys = blk_to_logical(inode, tmp.b_blocknr);
|
|
size = tmp.b_size;
|
|
flags = FIEMAP_EXTENT_MERGED;
|
|
|
|
length -= tmp.b_size;
|
|
start_blk += logical_to_blk(inode, size);
|
|
|
|
/*
|
|
* If we are past the EOF, then we need to make sure as
|
|
* soon as we find a hole that the last extent we found
|
|
* is marked with FIEMAP_EXTENT_LAST
|
|
*/
|
|
if (!past_eof &&
|
|
logical+size >=
|
|
blk_to_logical(inode, 0)+i_size_read(inode))
|
|
past_eof = 1;
|
|
}
|
|
cond_resched();
|
|
} while (1);
|
|
|
|
/* if ret is 1 then we just hit the end of the extent array */
|
|
if (ret == 1)
|
|
ret = 0;
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(__generic_block_fiemap);
|
|
|
|
/**
|
|
* generic_block_fiemap - FIEMAP for block based inodes
|
|
* @inode: The inode to map
|
|
* @fieinfo: The mapping information
|
|
* @start: The initial block to map
|
|
* @len: The length of the extect to attempt to map
|
|
* @get_block: The block mapping function for the fs
|
|
*
|
|
* Calls __generic_block_fiemap to map the inode, after taking
|
|
* the inode's mutex lock.
|
|
*/
|
|
|
|
int generic_block_fiemap(struct inode *inode,
|
|
struct fiemap_extent_info *fieinfo, u64 start,
|
|
u64 len, get_block_t *get_block)
|
|
{
|
|
int ret;
|
|
mutex_lock(&inode->i_mutex);
|
|
ret = __generic_block_fiemap(inode, fieinfo, start, len, get_block);
|
|
mutex_unlock(&inode->i_mutex);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(generic_block_fiemap);
|
|
|
|
#endif /* CONFIG_BLOCK */
|
|
|
|
/*
|
|
* This provides compatibility with legacy XFS pre-allocation ioctls
|
|
* which predate the fallocate syscall.
|
|
*
|
|
* Only the l_start, l_len and l_whence fields of the 'struct space_resv'
|
|
* are used here, rest are ignored.
|
|
*/
|
|
int ioctl_preallocate(struct file *filp, void __user *argp)
|
|
{
|
|
struct inode *inode = filp->f_path.dentry->d_inode;
|
|
struct space_resv sr;
|
|
|
|
if (copy_from_user(&sr, argp, sizeof(sr)))
|
|
return -EFAULT;
|
|
|
|
switch (sr.l_whence) {
|
|
case SEEK_SET:
|
|
break;
|
|
case SEEK_CUR:
|
|
sr.l_start += filp->f_pos;
|
|
break;
|
|
case SEEK_END:
|
|
sr.l_start += i_size_read(inode);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return do_fallocate(filp, FALLOC_FL_KEEP_SIZE, sr.l_start, sr.l_len);
|
|
}
|
|
|
|
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 FIONREAD:
|
|
return put_user(i_size_read(inode) - filp->f_pos, p);
|
|
case FS_IOC_RESVSP:
|
|
case FS_IOC_RESVSP64:
|
|
return ioctl_preallocate(filp, 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
|
|
spin_lock(&filp->f_lock);
|
|
if (on)
|
|
filp->f_flags |= flag;
|
|
else
|
|
filp->f_flags &= ~flag;
|
|
spin_unlock(&filp->f_lock);
|
|
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)
|
|
/* fasync() adjusts filp->f_flags */
|
|
error = filp->f_op->fasync(fd, filp, on);
|
|
else
|
|
error = -ENOTTY;
|
|
}
|
|
return error < 0 ? error : 0;
|
|
}
|
|
|
|
static int ioctl_fsfreeze(struct file *filp)
|
|
{
|
|
struct super_block *sb = filp->f_path.dentry->d_inode->i_sb;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
/* If filesystem doesn't support freeze feature, return. */
|
|
if (sb->s_op->freeze_fs == NULL)
|
|
return -EOPNOTSUPP;
|
|
|
|
/* If a blockdevice-backed filesystem isn't specified, return. */
|
|
if (sb->s_bdev == NULL)
|
|
return -EINVAL;
|
|
|
|
/* Freeze */
|
|
sb = freeze_bdev(sb->s_bdev);
|
|
if (IS_ERR(sb))
|
|
return PTR_ERR(sb);
|
|
return 0;
|
|
}
|
|
|
|
static int ioctl_fsthaw(struct file *filp)
|
|
{
|
|
struct super_block *sb = filp->f_path.dentry->d_inode->i_sb;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
/* If a blockdevice-backed filesystem isn't specified, return EINVAL. */
|
|
if (sb->s_bdev == NULL)
|
|
return -EINVAL;
|
|
|
|
/* Thaw */
|
|
return thaw_bdev(sb->s_bdev, sb);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
case FIFREEZE:
|
|
error = ioctl_fsfreeze(filp);
|
|
break;
|
|
|
|
case FITHAW:
|
|
error = ioctl_fsthaw(filp);
|
|
break;
|
|
|
|
case FS_IOC_FIEMAP:
|
|
return ioctl_fiemap(filp, arg);
|
|
|
|
case FIGETBSZ:
|
|
{
|
|
struct inode *inode = filp->f_path.dentry->d_inode;
|
|
int __user *p = (int __user *)arg;
|
|
return put_user(inode->i_sb->s_blocksize, p);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
SYSCALL_DEFINE3(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;
|
|
}
|