[9front] Re: [PATCH] make exportfs give "standard" error for file does exist

[Anthony Martin <ality@pbrane.org>]

The lady doth protest too much, methinks.

Here's a list of all file servers that do not use Enonexist,
aka "file does not exist" for this purpose:

	git/fs
	nusb/disk
	nusb/serial
	nusb/usbd
	skelfs

There's a commonality here. These are 9front snowflakes.
Just make them use the common error.

There is one wrinkle to my theory, however. When the kernel
attempts to walk a path but only partially succeeds (i.e. when
devwalk, mntwalk, or shrwalk returns with wq->clone set to
nil), it makes up an error since it has no way of knowing the
real underlying cause of failure. The error walk chooses is
"does not exist" or Enotdir even though it could be completely
wrong. That error could be renamed. I propose

	extern char Ecrippled[];	/* cannot walk */

but not really.

Alternatively, you could send a patch for net/9p/error.c to
lkml. Have you seen that monstrosity? What's one more
addition?

Cheers,
  Anthony