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f2fs: avoid unneeded data copy in f2fs_ioc_move_range()

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Fields in struct f2fs_move_range won't change in f2fs_ioc_move_range(),
let's avoid copying this structure's data to userspace.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2020-11-10 09:24:36 +08:00 committed by Jaegeuk Kim
parent e1e8debec6
commit 3a1b9eaf72
1 changed files with 0 additions and 6 deletions
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6
fs/f2fs/file.c
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@ -2898,12 +2898,6 @@ static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
range.pos_out, range.len); range.pos_out, range.len);
mnt_drop_write_file(filp); mnt_drop_write_file(filp);
if (err)
goto err_out;
if (copy_to_user((struct f2fs_move_range __user *)arg,
&range, sizeof(range)))
err = -EFAULT;
err_out: err_out:
fdput(dst); fdput(dst);
return err; return err;