Re: git: eca39864f702 - main - Add sysctl KERN_LOCKF

From: John Baldwin <jhb_at_FreeBSD.org>
Date: Tue, 12 Apr 2022 23:11:28 UTC
On 4/9/22 2:48 PM, Konstantin Belousov wrote:
> The branch main has been updated by kib:
> 
> URL: https://cgit.FreeBSD.org/src/commit/?id=eca39864f702e577eba3bc7e9992d1e5e56eba58
> 
> commit eca39864f702e577eba3bc7e9992d1e5e56eba58
> Author:     Konstantin Belousov <kib@FreeBSD.org>
> AuthorDate: 2022-04-01 23:23:06 +0000
> Commit:     Konstantin Belousov <kib@FreeBSD.org>
> CommitDate: 2022-04-09 21:43:53 +0000
> 
>      Add sysctl KERN_LOCKF
>      
>      reporting the shapshot of the active advisory locks.
>      
>      A new VFS ops method vfs_report_lockf if provided in the mount point
>      op table.  If it is NULL, as it is currently for all existing
>      filesystems, vfs_report_lockf() function is used, which gathers
>      information from the standard implementation inside kern/kern_lockf.c.
>      
>      Filesystems implementing its own locking (NFSv4 as example) can provide
>      a custom implementation.
>      
>      Reviewed by:    markj, rmacklem
>      Sponsored by:   The FreeBSD Foundation
>      MFC after:      1 week
>      Differential revision:  https://reviews.freebsd.org/D34756

Nice!  This is one of the things lsof has still groveled around in /dev/mem
directly for in the past.  Hopefully the lsof developer will make use of this.

-- 
John Baldwin