Messages in this thread |  | | Date | Thu, 26 Aug 2004 11:55:07 -0700 (PDT) | | From | Linus Torvalds <> | | Subject | Re: silent semantic changes with reiser4 |
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On Thu, 26 Aug 2004, Rik van Riel wrote: > > So you'd have both a file and a directory that just happen > to have the same name ? How would this work in the dcache?
There would be only one entry in the dcache. The lookup will select whether it opens the file or the directory based on O_DIRECTORY (and usage, of course - if it's in the middle of a path, it obviously needs to be opened as a directory regardless).
That's not the problem. The problem from a dcache standpoint ends up being when the file has a link, and you have two paths to the same sub-file through two different ways:
.. create file 'x' with named stream 'y' ... ln x z ls -l x/y z/y /* it's the same attribute!! */
but this is actually exactly the same thing that we already have with mounts, ie it is equivalent (from a dentry standpoint) to
.. create directory 'x' with file 'y' .. mkdir z mount --bind x z ls -l x/y z/y /* It's the same file!! */
so none of this is really anything "new" from a dcache standpoint.
Except for all the details, of course ;)
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