Re: [fuse-devel] How to build a transaction file system with committ on final close/release?

[a k <you...@ya...>]

Miklos:

From the kernel sources (2.4) (at end of message):

It seems that the structure filp has the reference
count:
filp->f_count

So could this not be used to inform the user if this
is the final flush on a file?



(filp_close)

        if (filp->f_op && filp->f_op->flush) {
                lock_kernel();
                retval = filp->f_op->flush(filp);
                unlock_kernel();
        }

(fput)
        if (atomic_dec_and_test(&file->f_count)) {
                locks_remove_flock(file);

                if (file->f_iobuf)
                        free_kiovec(1,
&file->f_iobuf);

                if (file->f_op && file->f_op->release)
                        file->f_op->release(inode,
file);



Alan

--- Miklos Szeredi <mi...@sz...> wrote:


> 
> If there was a way to check in the kernel whether
> any file descriptors
> are still refering to an open file I could pass that
> information to
> userspace, but I think it's not possible, but I'll
> recheck this.
> 
> 


		
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