From: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
To: Jeff Layton <jeff.layton-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
Cc: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
bfields-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org,
cluster-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 06/10] locks: plumb an "aux" pointer into the setlease routines
Date: Sun, 24 Aug 2014 08:54:54 -0700 [thread overview]
Message-ID: <20140824155454.GE15908@infradead.org> (raw)
In-Reply-To: <20140824060801.5402880c-08S845evdOaAjSkqwZiSMmfYqLom42DlXqFh9Ls21Oc@public.gmane.org>
On Sun, Aug 24, 2014 at 06:08:01AM -0400, Jeff Layton wrote:
> > Can you just return -EEXIST if reusing an existing one and make it a
> > normal private pointer a we use elsewhere?
> >
>
> That sounds a little confusing...
>
> We have two pointers we pass down to generic_setlease: the file_lock
> itself and with this patch, the "aux" pointer. We can end up using
> either, neither or both during a call to generic_setlease.
>
> A simple error code can't properly indicate which of the two pointers
> got used. It might be clearer to turn the file_lock into a normal
> pointer and return -EEXIST if we reused it, but leave aux as a double
> pointer.
There is no way we could use a new file_lock but an existing
fasync_struct, as there won't be one on the newly allocated file_lock
structure, but otherwise you're right.
Just rename it to priv then and make me a little less grumpy ;-)
next prev parent reply other threads:[~2014-08-24 15:54 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-23 14:41 [PATCH 00/10] locks/nfsd: internal lease API overhaul Jeff Layton
2014-08-23 14:41 ` [PATCH 04/10] locks: clean up vfs_setlease kerneldoc comments Jeff Layton
2014-08-24 15:51 ` Christoph Hellwig
[not found] ` <20140824155117.GC15908-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-08-25 20:11 ` J. Bruce Fields
2014-08-23 14:41 ` [PATCH 07/10] locks: define a lm_setup handler for leases Jeff Layton
[not found] ` <1408804878-1331-8-git-send-email-jlayton-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
2014-08-24 15:58 ` Christoph Hellwig
2014-08-25 1:19 ` Jeff Layton
2014-08-26 13:58 ` Christoph Hellwig
2014-08-23 14:41 ` [PATCH 08/10] locks: move i_lock acquisition into generic_*_lease handlers Jeff Layton
[not found] ` <1408804878-1331-9-git-send-email-jlayton-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
2014-08-24 16:06 ` Christoph Hellwig
[not found] ` <20140824160634.GG15908-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-08-24 16:11 ` Christoph Hellwig
[not found] ` <20140824161134.GJ15908-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-08-31 14:51 ` Jeff Layton
2014-08-25 1:36 ` Jeff Layton
[not found] ` <1408804878-1331-1-git-send-email-jlayton-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
2014-08-23 14:41 ` [PATCH 01/10] locks: close potential race in lease_get_mtime Jeff Layton
[not found] ` <1408804878-1331-2-git-send-email-jlayton-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
2014-08-24 15:48 ` Christoph Hellwig
2014-08-25 20:01 ` J. Bruce Fields
2014-08-23 14:41 ` [PATCH 02/10] nfsd: fix potential lease memory leak in nfs4_setlease Jeff Layton
[not found] ` <1408804878-1331-3-git-send-email-jlayton-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
2014-08-24 15:48 ` Christoph Hellwig
2014-08-23 14:41 ` [PATCH 03/10] locks: generic_delete_lease doesn't need a file_lock at all Jeff Layton
[not found] ` <1408804878-1331-4-git-send-email-jlayton-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
2014-08-24 1:27 ` Christoph Hellwig
[not found] ` <20140824012757.GA21609-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-08-24 10:09 ` Jeff Layton
2014-08-23 14:41 ` [PATCH 05/10] nfsd: don't keep a pointer to the lease in nfs4_file Jeff Layton
[not found] ` <1408804878-1331-6-git-send-email-jlayton-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
2014-08-24 15:51 ` Christoph Hellwig
2014-08-23 14:41 ` [PATCH 06/10] locks: plumb an "aux" pointer into the setlease routines Jeff Layton
[not found] ` <1408804878-1331-7-git-send-email-jlayton-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
2014-08-24 1:33 ` Christoph Hellwig
[not found] ` <20140824013305.GB21609-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-08-24 10:08 ` Jeff Layton
[not found] ` <20140824060801.5402880c-08S845evdOaAjSkqwZiSMmfYqLom42DlXqFh9Ls21Oc@public.gmane.org>
2014-08-24 15:54 ` Christoph Hellwig [this message]
2014-08-25 20:28 ` J. Bruce Fields
[not found] ` <20140825202852.GD21957-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2014-08-26 10:53 ` Jeff Layton
2014-08-23 14:41 ` [PATCH 09/10] locks: move freeing of leases outside of i_lock Jeff Layton
[not found] ` <1408804878-1331-10-git-send-email-jlayton-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
2014-08-24 16:08 ` Christoph Hellwig
[not found] ` <20140824160804.GH15908-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-08-25 1:35 ` Jeff Layton
2014-08-23 14:41 ` [PATCH 10/10] locks: update Documentation/filesystems with lease API changes Jeff Layton
2014-08-24 16:10 ` [PATCH 00/10] locks/nfsd: internal lease API overhaul Christoph Hellwig
[not found] ` <20140824161046.GI15908-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-08-25 1:43 ` Jeff Layton
[not found] ` <20140824214301.61019123-08S845evdOaAjSkqwZiSMmfYqLom42DlXqFh9Ls21Oc@public.gmane.org>
2014-08-26 13:59 ` Christoph Hellwig
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