Re: [Dazuko-devel] Device file events

[John Ogness]

Abhishek Nayani wrote:
> Currently, Dazuko only supports "Open" and "Exec" events on 2.6 using LSM. 
> Since dazuko registers the "inode_permission" hook, all the events which are 
> generated are because of open or exec, which are what we need. Can you expand 
> on what you mean by "many" events ?

I have included a simple patch that will allow all the file types to
generate events. I recommend that you try it out and see how many events
(particularly directory events) are generated. Then you will understand what
I mean by "many".


> Also, the context switches happen only when the user registers for the dev 
> directory, so I guess they do not come into the picture unless the user 
> actually wants to listen to them.

Yes, you are correct.

If you try allowing all file types, you will see the number events. I found
this alarming (and a bit misleading for the registered application), so I
decided to filter out all non-file or non-link events.

John Ogness

-- 
Dazuko Maintainer

Index: dazuko_linux26.c
===================================================================
RCS file: /cvsroot/dazuko/dazuko/dazuko_linux26.c,v
retrieving revision 1.60
diff -u -r1.60 dazuko_linux26.c
--- dazuko_linux26.c    2 Sep 2005 13:09:08 -0000       1.60
+++ dazuko_linux26.c    13 Sep 2005 13:59:28 -0000
@@ -371,10 +371,12 @@
        if (xfs->inode == NULL)
                return 0;
 
+/*
 #ifndef DAZUKO_FIST
        if (!S_ISREG(xfs->inode->i_mode) && !S_ISLNK(xfs->inode->i_mode))
                return 0;
 #endif
+*/
 
        if (xfs->nd == NULL || xfs->free_full_filename)
                return 0;