Re: [PATCH] locks: rename file-private locks to "open file description locks"

[Boaz Harrosh <bharrosh@panasas.com>]

On 04/22/2014 05:55 PM, Jeff Layton wrote:
> On Tue, 22 Apr 2014 17:45:31 +0300
> Boaz Harrosh <openosd@gmail.com> wrote:
> 
> 
> There's a big difference between the descriptor and the description.
> 
> The numerical value you get back from something like open() is a file
> descriptor. 

Ha OK sorry I thought that was a file-handle I think in FBSD they
call it that. I guess file-handle is the NFS thing.

I guess the most common name for those is file-No, fn in
code

> The thing that that value points to internally in the
> kernel is the file description. 

I did not know that and I completely interchanged these two.
In Kernel this is called plain "struct file" so I've never
seen this name used before.

OK Now it is clear

> It's very important that we do not
> conflate the two here as these locks are associated with the file
> description and not the file descriptor.
> 

Sure you are right.

> The best way to illustrate this is the interaction with dup() -- see
> the LWN article on these for a complete overview.
> 

I know the difference very well only I got the names mixed

Thanks
Boaz