From: Andreas Schwab <schwab@redhat.com>
To: Theodore Tso <tytso@MIT.EDU>
Cc: Al Viro <viro@ZenIV.linux.org.uk>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC] st_nlink after rmdir() and rename()
Date: Thu, 03 Mar 2011 17:17:32 +0100 [thread overview]
Message-ID: <m3y64wyy8z.fsf@redhat.com> (raw)
In-Reply-To: <406B4874-D3D8-4C05-9FA5-8A7A18ABF89C@mit.edu> (Theodore Tso's message of "Thu, 3 Mar 2011 09:34:08 -0500")
Theodore Tso <tytso@MIT.EDU> writes:
> On Mar 2, 2011, at 10:24 PM, Al Viro wrote:
>
>> We have an interesting problem. Consider the following sequence
>> of syscalls:
>> mkdir("foo", 0777);
>> mkdir("bar", 0777);
>> fd1 = open("foo", O_DIRECTORY);
>> fd2 = open("bar", O_DIRECTORY);
>> rename("foo", "bar"); /* kill old bar */
>
> I must be missing something. I didn't think you could rename on
> top of a directory and have the directory disappear. Don't you get
> an error in that case?
rename is required to be able to move a directory over an empty
directory, atomically.
> What happens if bar contains files?
That's an error.
Andreas.
--
Andreas Schwab, schwab@redhat.com
GPG Key fingerprint = D4E8 DBE3 3813 BB5D FA84 5EC7 45C6 250E 6F00 984E
"And now for something completely different."
next prev parent reply other threads:[~2011-03-03 16:17 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-03 3:24 [RFC] st_nlink after rmdir() and rename() Al Viro
2011-03-03 4:42 ` Al Viro
2011-03-03 5:17 ` Linus Torvalds
2011-03-03 6:03 ` Al Viro
2011-03-03 20:05 ` Linus Torvalds
2011-03-03 20:46 ` OGAWA Hirofumi
2011-03-03 20:50 ` OGAWA Hirofumi
2011-03-03 21:02 ` Linus Torvalds
2011-03-03 21:30 ` Al Viro
2011-03-03 21:37 ` OGAWA Hirofumi
2011-03-03 21:52 ` Linus Torvalds
2011-03-03 22:26 ` OGAWA Hirofumi
2011-03-03 22:37 ` Linus Torvalds
2011-03-03 23:14 ` OGAWA Hirofumi
2011-03-03 23:12 ` Al Viro
2011-03-03 22:57 ` Al Viro
2011-03-03 23:07 ` Al Viro
2011-03-04 6:55 ` omfs fixes Al Viro
2011-03-04 15:24 ` Bob Copeland
2011-03-03 21:23 ` [RFC] st_nlink after rmdir() and rename() Al Viro
2011-03-03 14:34 ` Theodore Tso
2011-03-03 16:17 ` Andreas Schwab [this message]
2011-03-03 19:16 ` Al Viro
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