linux-kernel - Re: inotify: notify IN_DELETE_SELF when file is deleted or inode deleted ?

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Message-ID: <CACLa4ps-YDABR5GZsFfXL0=_evU7LO5bmdmQu+zcSR8NXd-aQA@mail.gmail.com>
Date:	Fri, 6 Jul 2012 14:16:04 -0400
From:	Eric Paris <eparis@...isplace.org>
To:	Pierre PEIFFER <pierre.peiffer@...ricsson.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: inotify: notify IN_DELETE_SELF when file is deleted or inode
 deleted ?

It is inode oriented.  Makes it a pain to work with, but that's how it
is.  Sorry!

On Fri, Jun 29, 2012 at 10:06 AM, Pierre PEIFFER
<pierre.peiffer@...ricsson.com> wrote:
> Hi,
>
> By playing with inotify (on user side) to know whether the file I'm using is
> deleted by someone else,  I have noted that I do not receive the
> IN_DELETE_SELF event, exactly because I'm using it. By checking into kernel
> area, I see that at unlink(), an IN_ATTRIB event is sent, but IN_DELETE_SELF
> is, indeed, sent only when the inode is deleted.
>
> But such IN_ATTRIB event doesn't tell to the user what has changed among
> permissions, timestamps, link count, etc...
> So it doesn't much help. Of course, I have noted that I can monitor the
> parent directory for IN_DELETE and then check which file has been deleted;
> few more stuff to do but it works, no pb.
>
> But I'm still wondering after reading in the man.:
>            IN_DELETE_SELF    Watched file/directory was itself deleted.
> Is this really the expected behavior ? Shouldn't the kernel trig such event
> at unlink() ? Or is inotify clearly inode oriented ?
>
> Thanks,
>
> Pierre
>
> PS: keep me in cc, I'm not subscribed to the list.
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