diff options
Diffstat (limited to 'fs/ioctl.c')
| -rw-r--r-- | fs/ioctl.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/fs/ioctl.c b/fs/ioctl.c index 5152c98cfc30..282d45be6f45 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -54,19 +54,32 @@ EXPORT_SYMBOL(vfs_ioctl); static int ioctl_fibmap(struct file *filp, int __user *p) { - struct address_space *mapping = filp->f_mapping; - int res, block; + struct inode *inode = file_inode(filp); + int error, ur_block; + sector_t 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); + + error = get_user(ur_block, p); + if (error) + return error; + + if (ur_block < 0) + return -EINVAL; + + block = ur_block; + error = bmap(inode, &block); + + if (error) + ur_block = 0; + else + ur_block = block; + + if (put_user(ur_block, p)) + error = -EFAULT; + + return error; } /** |