Commit dd190d06 authored Sep 30, 2005 by Miklos Szeredi Committed by Linus Torvalds Sep 30, 2005

[PATCH] fuse: check O_DIRECT



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.

It could be a correctness issue too: if filesystem has open() with side
effect, then it should fail before doing the open, not after.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent daa35edc

fs/fuse/file.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -23,6 +23,10 @@ int fuse_open_common(struct inode inode, struct file file, int isdir)
		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;