From: Al Viro <viro@ZenIV.linux.org.uk>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Miklos Szeredi <miklos@szeredi.hu>,
akpm@linux-foundation.org, dave@linux.vnet.ibm.com,
ezk@cs.sunysb.edu, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [patch 01/10] vfs: add path_create() and path_mknod()
Date: Thu, 3 Apr 2008 00:47:58 +0100 [thread overview]
Message-ID: <20080402234758.GS9785@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20080402234043.GR9785@ZenIV.linux.org.uk>
On Thu, Apr 03, 2008 at 12:40:43AM +0100, Al Viro wrote:
> Anyway, what the hell for? It's more complex and buys you nothing
> useful.
BTW, what it gives you is an extra headache for scenarios like
task A:
write(fd, ...)
task B: /* shares descriptor table with A */
close(fd)
task C: umount(<mountpoint of tree where fd is>)
...
task A: still writing
At the very least, you want "that thing is still busy" on normal umount -
we are still in the middle of write(2) and hell knows how long it's going
to last. So you need to play with refcount of vfsmount in a very nasty
way, for all your pains. Again, what for?
next prev parent reply other threads:[~2008-04-02 23:53 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-02 20:12 [patch 00/10] vfs: add helpers to check r/o bind mounts Miklos Szeredi
2008-04-02 20:12 ` [patch 01/10] vfs: add path_create() and path_mknod() Miklos Szeredi
2008-04-02 20:54 ` Al Viro
2008-04-02 21:11 ` Miklos Szeredi
2008-04-02 21:48 ` Al Viro
2008-04-02 22:21 ` Trond Myklebust
2008-04-02 22:36 ` Al Viro
2008-04-02 23:19 ` Trond Myklebust
2008-04-02 23:40 ` Al Viro
2008-04-02 23:47 ` Al Viro [this message]
2008-04-03 0:42 ` Trond Myklebust
2008-04-03 0:47 ` Erez Zadok
2008-04-03 1:00 ` Al Viro
2008-04-03 1:37 ` Erez Zadok
2008-04-03 1:46 ` Al Viro
2008-04-03 2:21 ` Erez Zadok
2008-04-03 2:32 ` Al Viro
2008-04-03 23:24 ` Erez Zadok
2008-04-04 11:04 ` Miklos Szeredi
2008-04-03 0:58 ` Al Viro
2008-04-03 7:32 ` Miklos Szeredi
2008-04-03 22:32 ` Erez Zadok
2008-04-03 12:33 ` Stephen Smalley
2008-04-02 21:00 ` Dave Hansen
2008-04-02 21:19 ` Dave Hansen
2008-04-02 20:12 ` [patch 02/10] vfs: add path_mkdir() Miklos Szeredi
2008-04-02 22:15 ` Erez Zadok
2008-04-02 20:12 ` [patch 03/10] vfs: add path_rmdir() Miklos Szeredi
2008-04-02 20:12 ` [patch 04/10] vfs: add path_unlink() Miklos Szeredi
2008-04-02 20:12 ` [patch 05/10] vfs: add path_symlink() Miklos Szeredi
2008-04-02 20:12 ` [patch 06/10] vfs: add path_link() Miklos Szeredi
2008-04-02 20:12 ` [patch 07/10] vfs: add path_rename() Miklos Szeredi
2008-04-04 17:56 ` Erez Zadok
2008-04-04 18:04 ` Miklos Szeredi
2008-04-02 20:12 ` [patch 08/10] vfs: add path_setattr() Miklos Szeredi
2008-04-02 20:12 ` [patch 09/10] vfs: add path_setxattr() Miklos Szeredi
2008-04-02 20:12 ` [patch 10/10] vfs: add path_removexattr() Miklos Szeredi
2008-04-02 21:22 ` [patch 00/10] vfs: add helpers to check r/o bind mounts Erez Zadok
2008-04-09 0:53 ` [PATCH] Unionfs: use the new path_* VFS helpers Erez Zadok
2008-04-10 11:10 ` Miklos Szeredi
2008-04-10 12:02 ` [PATCH] Call LSM functions outside VFS helper functions Tetsuo Handa
2008-04-10 12:17 ` Matthew Wilcox
2008-04-10 12:56 ` Miklos Szeredi
-- strict thread matches above, loose matches on Subject: below --
2008-05-05 10:16 [patch 00/10] vfs: add helpers to check r/o bind mounts v3 Miklos Szeredi
2008-05-05 10:16 ` [patch 01/10] vfs: add path_create() and path_mknod() Miklos Szeredi
2008-05-06 4:12 ` Andrew Morton
2008-05-06 4:24 ` Al Viro
2008-05-06 5:46 ` Andrew Morton
2008-05-06 6:24 ` Miklos Szeredi
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