From: Christoph Hellwig <hch@infradead.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: "J. Bruce Fields" <bfields@fieldses.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Bryan Schumaker <bjschuma@netapp.com>,
linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: nfsd changes for 2.6.37
Date: Wed, 27 Oct 2010 04:39:24 -0400 [thread overview]
Message-ID: <20101027083924.GA28129@infradead.org> (raw)
In-Reply-To: <201010270921.37032.arnd@arndb.de>
> If you don't hold lock_flocks throughout fcntl_setlease, the flp variable
> points to a flock that may get modified by another thread and you call
> time_out_leases() without holding lock_flocks, which it requires.
>
> The two alternatives I can see are to either use GFP_ATOMIC or to
> take the lock inside of generic_setlease and drop it outside.
> Neither of the two sounds particularly appealing.
Do locks_alloc_lock and initialization of the heap struct file_lock
in the caller. This also avoids an entirely useless copy of the
lock structure. free the passed in structure if we are modifying
an existing lock structure.
next prev parent reply other threads:[~2010-10-27 8:39 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-26 16:45 nfsd changes for 2.6.37 J. Bruce Fields
2010-10-26 17:22 ` J. Bruce Fields
2010-10-26 17:39 ` Linus Torvalds
[not found] ` <AANLkTi=emsmLNFSV=j48d37JQxecQmNGZwY9OYdoKjeS-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-10-26 17:46 ` J. Bruce Fields
2010-10-26 20:18 ` Arnd Bergmann
2010-10-26 20:35 ` Bryan Schumaker
2010-10-26 20:55 ` Arnd Bergmann
2010-10-26 21:02 ` Linus Torvalds
2010-10-26 21:24 ` J. Bruce Fields
2010-10-26 21:37 ` Linus Torvalds
2010-10-26 21:44 ` J. Bruce Fields
2010-10-26 22:11 ` J. Bruce Fields
2010-10-26 22:41 ` J. Bruce Fields
2010-10-27 7:21 ` Arnd Bergmann
2010-10-27 8:39 ` Christoph Hellwig [this message]
2010-10-27 13:39 ` J. Bruce Fields
2010-10-27 13:46 ` Arnd Bergmann
2010-10-27 14:55 ` J. Bruce Fields
2010-10-27 14:59 ` Christoph Hellwig
2010-10-27 15:16 ` J. Bruce Fields
2010-10-27 15:19 ` Christoph Hellwig
2010-10-27 15:23 ` Arnd Bergmann
2010-10-27 15:28 ` J. Bruce Fields
2010-10-27 15:31 ` Christoph Hellwig
2010-10-27 16:12 ` Linus Torvalds
[not found] ` <AANLkTinTm-LwjfBfoFUyp5Dj8S2hexnHGQGpZiOWqyMY-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-10-27 16:46 ` J. Bruce Fields
2010-10-27 17:32 ` Linus Torvalds
2010-10-27 17:40 ` J. Bruce Fields
2010-10-27 18:20 ` Arnd Bergmann
2010-10-27 18:42 ` Linus Torvalds
2010-10-27 18:43 ` Linus Torvalds
2010-10-27 19:48 ` Arnd Bergmann
2010-10-27 20:01 ` J. Bruce Fields
2010-10-27 20:20 ` Arnd Bergmann
2010-10-27 20:24 ` J. Bruce Fields
2010-10-30 21:25 ` J. Bruce Fields
2010-10-30 21:31 ` [PATCH 1/4] locks: prevent ENOMEM on lease unlock J. Bruce Fields
2010-10-30 21:31 ` [PATCH 2/4] locks: fix leaks on setlease errors J. Bruce Fields
2010-10-31 11:10 ` Christoph Hellwig
2010-11-01 17:24 ` J. Bruce Fields
2010-11-01 17:41 ` Christoph Hellwig
2010-11-01 18:34 ` J. Bruce Fields
2010-10-30 21:31 ` [PATCH 3/4] locks: fix setlease methods to free passed-in lock J. Bruce Fields
2010-10-30 21:31 ` [PATCH 4/4] nfsd4: initialize delegation pointer to lease J. Bruce Fields
2010-10-31 2:04 ` Christoph Hellwig
2010-10-31 3:04 ` J. Bruce Fields
2010-10-30 21:40 ` nfsd changes for 2.6.37 Arnd Bergmann
2010-10-31 2:07 ` Christoph Hellwig
2010-10-31 3:05 ` J. Bruce Fields
2010-10-31 12:34 ` Christoph Hellwig
2010-10-31 12:35 ` [PATCH 1/2] locks: let the caller free file_lock on ->setlease failure Christoph Hellwig
2010-11-03 20:41 ` J. Bruce Fields
2010-11-04 1:40 ` J. Bruce Fields
2010-11-04 1:41 ` J. Bruce Fields
2010-11-06 19:03 ` Christoph Hellwig
2010-11-06 19:03 ` Christoph Hellwig
2010-11-08 16:10 ` J. Bruce Fields
2010-10-31 12:35 ` [PATCH 2/2] locks: remove fl_copy_lock lock_manager operation Christoph Hellwig
2010-11-01 15:02 ` nfsd changes for 2.6.37 J. Bruce Fields
2010-11-06 19:04 ` Christoph Hellwig
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