From: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
To: "J. Bruce Fields" <bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
samba-technical-w/Ol4Ecudpl8XjKLYN78aQ@public.gmane.org,
Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Al Viro <viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>,
Mimi Zohar
<zohar-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
Subject: Re: [PATCH 3/6] leases: break read leases on unlink
Date: Wed, 21 Sep 2011 11:02:41 -0400 [thread overview]
Message-ID: <20110921150241.GA11452@infradead.org> (raw)
In-Reply-To: <1316617097-21384-4-git-send-email-bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Wed, Sep 21, 2011 at 10:58:14AM -0400, J. Bruce Fields wrote:
> A read lease is used by NFSv4 as a guarantee that a client can perform
> local read opens without informing the server.
>
> The open operation takes the last component of the pathname as an
> argument, thus is also a lookup operation, and giving the client the
> above guarantee means informing the client before we allow anything that
> would change the set of names pointing to the inode.
That seems like totally strange semantics. A useful defintion of a
lase operation would mean it guarantees I/O can happen, and wouldn't
care about metadata operation. That's the whole point in adding a
stateful open to nfs4, isn't it?
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next prev parent reply other threads:[~2011-09-21 15:02 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-21 14:58 breaking leases on metadata changes J. Bruce Fields
[not found] ` <1316617097-21384-1-git-send-email-bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-09-21 14:58 ` [PATCH 1/6] leases: split up generic_setlease into lock/unlock cases J. Bruce Fields
2011-09-22 17:16 ` Mimi Zohar
[not found] ` <1316711774.3159.52.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2011-09-23 18:57 ` J. Bruce Fields
2011-09-21 14:58 ` [PATCH 5/6] leases: break leases on any attribute modification J. Bruce Fields
2011-09-21 15:35 ` J. Bruce Fields
2011-09-21 14:58 ` [PATCH 2/6] leases: fix write-open/read-lease race J. Bruce Fields
2011-09-21 15:01 ` J. Bruce Fields
2011-09-22 17:17 ` Mimi Zohar
[not found] ` <1316617097-21384-3-git-send-email-bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-10-10 21:59 ` J. Bruce Fields
2011-10-11 6:19 ` Need information about the net ads user command Pankaj Baranwal
[not found] ` <20111010215911.GC17936-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2011-10-28 8:46 ` [PATCH 2/6] leases: fix write-open/read-lease race J. Bruce Fields
2011-09-21 14:58 ` [PATCH 3/6] leases: break read leases on unlink J. Bruce Fields
[not found] ` <1316617097-21384-4-git-send-email-bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-09-21 15:02 ` Christoph Hellwig [this message]
[not found] ` <20110921150241.GA11452-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2011-09-21 17:41 ` J. Bruce Fields
2011-09-21 14:58 ` [PATCH 4/6] leases: break read leases on rename J. Bruce Fields
[not found] ` <1316617097-21384-5-git-send-email-bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-09-22 17:17 ` Mimi Zohar
2011-09-23 16:55 ` J. Bruce Fields
[not found] ` <20110923165510.GA807-spRCxval1Z7TsXDwO4sDpg@public.gmane.org>
2011-09-23 18:55 ` J. Bruce Fields
2011-09-23 19:58 ` Mimi Zohar
2011-09-23 20:13 ` J. Bruce Fields
2011-09-21 14:58 ` [PATCH 6/6] leases: break read leases on link J. Bruce Fields
2011-09-24 18:36 ` breaking leases on metadata changes Stefan (metze) Metzmacher
2011-09-26 14:10 ` J. Bruce Fields
2011-09-26 16:16 ` J. Bruce Fields
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