From: Christoph Hellwig <hch@infradead.org>
To: Jeff Layton <jlayton@redhat.com>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
nfs-ganesha-devel@lists.sourceforge.net,
samba-technical@lists.samba.org
Subject: Re: [PATCH v3 6/6] locks: add new "private" lock type that is owned by the filp
Date: Tue, 17 Dec 2013 05:37:21 -0800 [thread overview]
Message-ID: <20131217133721.GA16724@infradead.org> (raw)
In-Reply-To: <20131217083125.4ce0382b@tlielax.poochiereds.net>
On Tue, Dec 17, 2013 at 08:31:25AM -0500, Jeff Layton wrote:
> So, I think the above semantics are pretty clear, but now that I've had
> a go at sitting down to document this stuff for the POSIX spec and
> manpages, it's clear how convoluted the text in there is becoming.
>
> That makes me wonder...would we be better off with a new set of cmd
> values here instead of new l_type values? IOW, we could add new:
>
> F_GETLKP
> F_SETLKP
> F_SETLKPW
That seems a tad cleaner to me indeed.
> ...and then just reuse the same F_RDLCK/F_WRLCK/F_UNLCK values? With
> that too, we could create a new equivalent to struct flock that has
> fixed length types instead of dealing with the off_t mess.
For the Posix interface you'd need an off_t as that's what the whole
API uses for file offsets. We could make sure to always use a off64_t
for the kernel interface though.
What is the API you propose to posix? An new posix_lockf?
next prev parent reply other threads:[~2013-12-17 13:37 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-10 19:17 [PATCH v3 0/6] locks: implement "filp-private" (aka UNPOSIX) locks Jeff Layton
2013-12-10 19:17 ` [PATCH v3 1/6] locks: consolidate common code in the flock_to_posix_lock routines Jeff Layton
2013-12-10 21:22 ` J. Bruce Fields
2013-12-10 23:22 ` J. Bruce Fields
2013-12-11 11:18 ` Jeff Layton
2013-12-11 14:37 ` J. Bruce Fields
2013-12-11 15:19 ` J. Bruce Fields
2013-12-11 16:54 ` Jeff Layton
2013-12-11 16:59 ` J. Bruce Fields
2013-12-11 18:09 ` Jeff Layton
2013-12-11 19:07 ` Jeff Layton
2013-12-11 22:56 ` J. Bruce Fields
2013-12-11 22:57 ` J. Bruce Fields
2013-12-12 10:43 ` Jeff Layton
2013-12-12 10:44 ` Jeff Layton
2014-01-05 20:39 ` J. Bruce Fields
2014-01-05 20:42 ` [PATCH] locks: fix posix lock range overflow handling J. Bruce Fields
2013-12-10 19:17 ` [PATCH v3 2/6] locks: consolidate checks for compatible filp->f_mode values in setlk handlers Jeff Layton
2013-12-10 19:17 ` [PATCH v3 3/6] locks: rename locks_remove_flock to locks_remove_file Jeff Layton
2013-12-10 19:17 ` [PATCH v3 4/6] locks: show private lock types in /proc/locks Jeff Layton
2013-12-10 19:17 ` [PATCH v3 5/6] locks: report l_pid as -1 for FL_FILE_PVT locks Jeff Layton
2013-12-10 19:31 ` Jeff Layton
2013-12-10 19:41 ` [Nfs-ganesha-devel] " Frank Filz
2013-12-10 19:57 ` Jeff Layton
2013-12-10 19:17 ` [PATCH v3 6/6] locks: add new "private" lock type that is owned by the filp Jeff Layton
2013-12-17 13:31 ` Jeff Layton
2013-12-17 13:37 ` Christoph Hellwig [this message]
2013-12-17 13:50 ` Jeff Layton
2013-12-10 19:30 ` [Nfs-ganesha-devel] [PATCH v3 0/6] locks: implement "filp-private" (aka UNPOSIX) locks Frank Filz
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