Messages in this thread |  | | Subject | Re: [PATCH 0/7] Permit filesystem local caching and NFS superblock sharing [try #13] | From | Ian Kent <> | Date | Tue, 05 Sep 2006 20:20:17 +0800 |
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On Tue, 2006-09-05 at 11:37 +0100, David Howells wrote: > Ian Kent <raven@themaw.net> wrote: > > > > As long as you don't rely on stat...mkdir working. That can go wrong if the > > > dentry gets booted from the dcache by memory pressure in the "...". > > > > I'm not clear on your point here. > > I was wondering if you were going to rely on stat() forcing the dentry to be > correctly initialised before you did mkdir(), but it seems not. > > > If I stat a path and it exists then all is good and I'm done. > > If I stat a path and I get something other than ENOENT then all is bad > > and I return fail. > > Otherwise I can just attempt to create the directory and fail if all is > > bad with that. > > Okay, I suppose. But that still doesn't seem to deal with the case of creating > a directory on the client that then overlays a symlink on the server that you > can't yet access.
We're largely performing user space actions at this point. Wouldn't the subsequent call to mount(8) catch that?
> > You may also get ENOENT because you stat a symlink, though you'll get EEXIST > from mkdir, even if there's nothing at the far end.
Don't think this is something I need to care about either. I can't mount on a symlink so the error return would be the correct way to deal with it.
Ian
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