diff options
Diffstat (limited to 'fs/ioctl.c')
| -rw-r--r-- | fs/ioctl.c | 38 |
1 files changed, 20 insertions, 18 deletions
diff --git a/fs/ioctl.c b/fs/ioctl.c index d6cc1647662..1d9b9fcb2db 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -86,7 +86,7 @@ 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; + struct fiemap_extent __user *dest = fieinfo->fi_extents_start; /* only count the extents */ if (fieinfo->fi_extents_max == 0) { @@ -173,6 +173,7 @@ static int fiemap_check_ranges(struct super_block *sb, static int ioctl_fiemap(struct file *filp, unsigned long arg) { struct fiemap fiemap; + struct fiemap __user *ufiemap = (struct fiemap __user *) arg; struct fiemap_extent_info fieinfo = { 0, }; struct inode *inode = filp->f_path.dentry->d_inode; struct super_block *sb = inode->i_sb; @@ -182,8 +183,7 @@ static int ioctl_fiemap(struct file *filp, unsigned long arg) if (!inode->i_op->fiemap) return -EOPNOTSUPP; - if (copy_from_user(&fiemap, (struct fiemap __user *)arg, - sizeof(struct fiemap))) + if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap))) return -EFAULT; if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS) @@ -196,7 +196,7 @@ static int ioctl_fiemap(struct file *filp, unsigned long arg) fieinfo.fi_flags = fiemap.fm_flags; fieinfo.fi_extents_max = fiemap.fm_extent_count; - fieinfo.fi_extents_start = (struct fiemap_extent *)(arg + sizeof(fiemap)); + fieinfo.fi_extents_start = ufiemap->fm_extents; if (fiemap.fm_extent_count != 0 && !access_ok(VERIFY_WRITE, fieinfo.fi_extents_start, @@ -209,7 +209,7 @@ static int ioctl_fiemap(struct file *filp, unsigned long arg) 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))) + if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap))) error = -EFAULT; return error; @@ -273,6 +273,13 @@ int __generic_block_fiemap(struct inode *inode, len = isize; } + /* + * Some filesystems can't deal with being asked to map less than + * blocksize, so make sure our len is at least block length. + */ + if (logical_to_blk(inode, len) == 0) + len = blk_to_logical(inode, 1); + start_blk = logical_to_blk(inode, start); last_blk = logical_to_blk(inode, start + len - 1); @@ -541,6 +548,7 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, { int error = 0; int __user *argp = (int __user *)arg; + struct inode *inode = filp->f_path.dentry->d_inode; switch (cmd) { case FIOCLEX: @@ -560,13 +568,11 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, 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; + if (S_ISDIR(inode->i_mode) || S_ISREG(inode->i_mode) || + S_ISLNK(inode->i_mode)) { + loff_t res = inode_get_bytes(inode); + error = copy_to_user(argp, &res, sizeof(res)) ? + -EFAULT : 0; } else error = -ENOTTY; break; @@ -583,14 +589,10 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, 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); - } + return put_user(inode->i_sb->s_blocksize, argp); default: - if (S_ISREG(filp->f_path.dentry->d_inode->i_mode)) + if (S_ISREG(inode->i_mode)) error = file_ioctl(filp, cmd, arg); else error = vfs_ioctl(filp, cmd, arg); |