[Dazuko-devel] MAJOR CVS commit

[John Ogness]

Hi,

I have just finished commiting some changes that I have been working on 
for a week now. These are some major changes that include major 
improvements.

A little history: I originally received the source code to the Dazuko 
Project back in November 2001. Over the years I have worked to improve 
both the feature set and the design. From Dazuko 1.0 there are only 2 
major items that still exist in the code today.
  - hooking the system call table
  - using a hash list of open files to determine file names "on close"

The second item (with the hash list) has always been a big, inefficient 
problem with Dazuko. Since Dazuko has had other more important problems 
in the past, this problem has always been low-priority.

Well, about a week ago I started taking this problem seriously and 
started digging in the kernel code to see what is going on. What did I 
discover? Dazuko doesn't need this hash list at all!!! It is no problem 
to lookup filenames (ie. grab dentry's) if you have a file descriptor!

I have now ripped out the hash list and implemented this on all 
operating systems. It works beautifully!
  - ON_CLOSE events are now reliable and accurate
  - ON_CLOSE and ON_OPEN events are now much faster
  - much less memory allocation and no more memory leaks

At the moment this means that ON_CLOSE_MODIFIED events will never be 
generated, but I already have a plan how to bring them back (without any 
real overhead).

These changes are only available in CVS. They will be posted on the 
website as a 2.1.0-pre-release (in a week and a half).

John Ogness

--
Dazuko Maintainer