Re: directory notification.

From: Terje Malmedal
Date: Wed Nov 05 2003 - 05:24:06 EST

[Stephen Rothwell]
> On Tue, 4 Nov 2003 18:44:29 +0100 Terje Malmedal <terje.malmedal@xxxxxxxxxxx> wrote:
>> Modifications of existing files via NFS are not picked up by the
>> directory notification system.
>> kernel is 2.4.22, I'm testing with the example program from
>> /usr/src/linux/Documentation/dnotify.txt
>> I get notifications on the following:
>> nfs-server# echo hello >> existing.file
>> nfs-client# echo hello > new.file
>> But not on this:
>> nfs-client# echo hello >> existing.file
>> I guess the problem of detecting changes done via NFS is similar to
>> the problem of multiple hard-links to the same file, which is
>> documented as not supported.
>> Is this something that can be fixed, or is it going to be too
>> difficult to go from NFS-handle and back to the directory it came
>> from?

> Are you running the program that expects notifies on the NFS server or the
> client?

On the server of course.

> If on the client, you will never get notifies for modifications
> made on the server or other clients. If on the server, it needs looking
> at as you should get the notifies (I think - it has been a while since I
> last looked at the NFS server code).

It would be very nice if this could be fixed.

- Terje
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