Miklos Szeredi <[email protected]> wrote:
>
> Check O_DIRECT and return -EINVAL error in open. dentry_open() also
> checks this but only after the open method is called. This patch
> optimizes away the unnecessary upcalls in this case.
>
> Signed-off-by: Miklos Szeredi <[email protected]>
>
> Index: linux/fs/fuse/file.c
> ===================================================================
> --- linux.orig/fs/fuse/file.c 2005-09-21 11:55:45.000000000 +0200
> +++ linux/fs/fuse/file.c 2005-09-23 15:24:23.000000000 +0200
> @@ -23,6 +23,10 @@ int fuse_open_common(struct inode *inode
> struct fuse_file *ff;
> int err;
>
> + /* VFS checks this, but only _after_ ->open() */
> + if (file->f_flags & O_DIRECT)
> + return -EINVAL;
> +
> err = generic_file_open(inode, file);
> if (err)
> return err;
This hardly seems worth optimising for?
-
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