From: Al Viro <viro@ZenIV.linux.org.uk>
To: Erez Zadok <ezk@cs.sunysb.edu>
Cc: Miklos Szeredi <miklos@szeredi.hu>,
akpm@linux-foundation.org, torvalds@linux-foundation.org,
dave@linux.vnet.ibm.com, mhalcrow@us.ibm.com,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [patch 00/13] vfs: add helpers to check r/o bind mounts
Date: Thu, 24 Apr 2008 18:30:13 +0100 [thread overview]
Message-ID: <20080424173013.GA5882@ZenIV.linux.org.uk> (raw)
In-Reply-To: <200804241725.m3OHPwIs015778@agora.fsl.cs.sunysb.edu>
On Thu, Apr 24, 2008 at 01:25:58PM -0400, Erez Zadok wrote:
> Al, any near-term plans for sb-level "want write" locking as we discussed
> briefly at LSF? Being able to do so for copyup in unionfs will hopefully
> allow me to prevent concurrent topology changes.
That's pretty close to the top.
> the two directories that need locking. This rename-locking protocol appears
> to be a special case of the sb-level "want write" idea, right?
Not really - that one doesn't provide any exclusion between writers and
that's what we want from rename/rename.
Take a look at Documentation/filesystems/directory-locking for details
of locking scheme...
next prev parent reply other threads:[~2008-04-24 17:31 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-24 11:39 [patch 00/13] vfs: add helpers to check r/o bind mounts Miklos Szeredi
2008-04-24 11:39 ` [patch 01/13] ecryptfs: add missing lock around notify_change Miklos Szeredi
2008-04-24 16:56 ` Erez Zadok
2008-04-24 17:09 ` Miklos Szeredi
2008-04-24 11:39 ` [patch 02/13] ecryptfs: clean up (un)lock_parent Miklos Szeredi
2008-04-24 11:39 ` [patch 03/13] nfsd: clean up mnt_want_write calls Miklos Szeredi
2008-04-24 11:39 ` [patch 04/13] vfs: add path_create() and path_mknod() Miklos Szeredi
2008-04-24 11:39 ` [patch 05/13] vfs: add path_mkdir() Miklos Szeredi
2008-04-24 11:39 ` [patch 06/13] vfs: add path_rmdir() Miklos Szeredi
2008-04-24 11:39 ` [patch 07/13] vfs: add path_unlink() Miklos Szeredi
2008-04-24 11:39 ` [patch 08/13] vfs: add path_symlink() Miklos Szeredi
2008-04-24 11:39 ` [patch 09/13] vfs: add path_link() Miklos Szeredi
2008-04-24 11:40 ` [patch 10/13] vfs: add path_rename() Miklos Szeredi
2008-04-24 11:40 ` [patch 11/13] vfs: add path_setattr() Miklos Szeredi
2008-04-24 11:40 ` [patch 12/13] vfs: add path_setxattr() Miklos Szeredi
2008-04-24 11:40 ` [patch 13/13] vfs: add path_removexattr() Miklos Szeredi
2008-04-24 12:42 ` [patch 00/13] vfs: add helpers to check r/o bind mounts Al Viro
2008-04-24 13:05 ` Miklos Szeredi
2008-04-24 13:48 ` Al Viro
2008-04-24 14:00 ` Al Viro
2008-04-24 14:16 ` Miklos Szeredi
2008-04-24 14:35 ` Al Viro
2008-04-24 14:42 ` Miklos Szeredi
2008-04-24 14:48 ` Al Viro
2008-04-24 14:58 ` Miklos Szeredi
2008-04-24 15:21 ` Al Viro
2008-04-24 15:37 ` Miklos Szeredi
2008-04-24 15:59 ` Al Viro
2008-04-24 16:16 ` Miklos Szeredi
2008-04-28 10:15 ` Miklos Szeredi
2008-04-28 14:20 ` Michael Halcrow
2008-04-28 14:52 ` Miklos Szeredi
2008-04-25 7:22 ` Miklos Szeredi
2008-04-24 17:55 ` Dave Hansen
2008-04-24 18:47 ` Miklos Szeredi
2008-04-24 14:09 ` Miklos Szeredi
2008-04-24 14:28 ` Al Viro
2008-04-24 14:36 ` Miklos Szeredi
2008-04-24 14:44 ` Al Viro
2008-04-24 14:53 ` Miklos Szeredi
2008-04-24 15:12 ` Al Viro
2008-04-24 15:18 ` Miklos Szeredi
2008-04-24 15:38 ` Al Viro
2008-04-24 15:43 ` Miklos Szeredi
2008-04-24 17:29 ` Erez Zadok
2008-04-24 18:13 ` Al Viro
2008-04-24 19:40 ` Erez Zadok
2008-04-24 20:16 ` Michael Halcrow
2008-04-24 22:39 ` Erez Zadok
2008-04-24 23:33 ` Michael Halcrow
2008-04-28 21:53 ` J. Bruce Fields
2008-04-24 17:25 ` Erez Zadok
2008-04-24 17:30 ` Al Viro [this message]
2008-04-24 19:56 ` Erez Zadok
2008-04-24 17:04 ` Erez Zadok
2008-04-24 16:52 ` Erez Zadok
2008-04-24 16:58 ` Miklos Szeredi
2008-04-24 17:14 ` Erez Zadok
2008-04-24 17:23 ` Miklos Szeredi
2008-05-01 5:40 ` Dave Hansen
2008-05-01 8:08 ` Miklos Szeredi
2008-05-01 16:40 ` Dave Hansen
2008-05-01 17:04 ` Miklos Szeredi
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