From: Valerie Aurora <vaurora@redhat.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: viro@zeniv.linux.org.uk, jblunck@suse.de, hch@infradead.org,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 19/39] union-mount: Implement union lookup
Date: Tue, 17 Aug 2010 17:44:04 -0400 [thread overview]
Message-ID: <20100817214404.GH5556@shell> (raw)
In-Reply-To: <E1Ojud6-0004Br-D6@pomaz-ex.szeredi.hu>
On Fri, Aug 13, 2010 at 03:49:04PM +0200, Miklos Szeredi wrote:
> On Sun, 8 Aug 2010, Valerie Aurora wrote:
> > Implement unioned directories, whiteouts, and fallthrus in pathname
> > lookup routines. do_lookup() and lookup_hash() call lookup_union()
> > after looking up the dentry from the top-level file system.
> > lookup_union() is centered around __lookup_hash(), which does cached
> > and/or real lookups and revalidates each dentry in the union stack.
> >
> > XXX - implement negative union cache entries
> >
> > XXX - handle different permissions on directories
>
> If process doing the lookup doesn't have write permission on the top
> level directory then the lookup will fail. This is not intended, is
> it?
Does it fail? I'm not checking permissions before calling
->fallthru(). But I can't test this because the code doesn't set the
owner of the copied up directory correctly. :)
Don't bother doing any permission testing on this version - it's known
buggy and I will fix it in the next release.
Thanks,
-VAL
next prev parent reply other threads:[~2010-08-17 21:44 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-08 15:52 [PATCH 00/39] Union mounts - return d_ino from lower fs Valerie Aurora
2010-08-08 15:52 ` [PATCH 01/39] VFS: Comment follow_mount() and friends Valerie Aurora
2010-08-08 15:52 ` [PATCH 02/39] VFS: Make lookup_hash() return a struct path Valerie Aurora
2010-08-08 15:52 ` [PATCH 03/39] VFS: Add read-only users count to superblock Valerie Aurora
2010-08-08 15:52 ` [PATCH 04/39] autofs4: Save autofs trigger's vfsmount in super block info Valerie Aurora
2010-08-08 15:52 ` [PATCH 05/39] whiteout/NFSD: Don't return information about whiteouts to userspace Valerie Aurora
2010-08-08 15:52 ` [PATCH 06/39] whiteout: Add vfs_whiteout() and whiteout inode operation Valerie Aurora
2010-08-08 15:52 ` [PATCH 07/39] whiteout: Set opaque flag if new directory was previously a whiteout Valerie Aurora
2010-08-08 15:52 ` [PATCH 08/39] whiteout: Allow removal of a directory with whiteouts Valerie Aurora
2010-08-08 15:52 ` [PATCH 09/39] whiteout: tmpfs whiteout support Valerie Aurora
2010-08-08 15:52 ` [PATCH 10/39] whiteout: Split of ext2_append_link() from ext2_add_link() Valerie Aurora
2010-08-08 15:52 ` [PATCH 11/39] whiteout: ext2 whiteout support Valerie Aurora
2010-08-08 15:52 ` [PATCH 12/39] whiteout: jffs2 " Valerie Aurora
2010-08-08 15:52 ` [PATCH 13/39] fallthru: Basic fallthru definitions Valerie Aurora
2010-08-08 15:52 ` [PATCH 14/39] union-mount: Union mounts documentation Valerie Aurora
2010-08-09 22:56 ` Neil Brown
2010-08-11 1:51 ` J. R. Okajima
2010-08-17 20:44 ` Valerie Aurora
2010-08-17 22:53 ` Neil Brown
2010-08-18 0:15 ` Luca Barbieri
2010-08-18 19:04 ` Valerie Aurora
2010-08-18 1:23 ` J. R. Okajima
2010-08-18 18:55 ` Valerie Aurora
2010-08-19 1:34 ` J. R. Okajima
2010-08-24 0:05 ` Valerie Aurora
2010-08-24 2:28 ` J. R. Okajima
2010-08-24 20:48 ` Valerie Aurora
2010-08-25 2:59 ` Christian Stroetmann
2010-08-25 5:03 ` J. R. Okajima
2010-08-08 15:52 ` [PATCH 15/39] union-mount: Introduce MNT_UNION and MS_UNION flags Valerie Aurora
2010-08-08 15:52 ` [PATCH 16/39] union-mount: Introduce union_dir structure and basic operations Valerie Aurora
2010-08-08 15:52 ` [PATCH 17/39] union-mount: Free union dirs on removal from dcache Valerie Aurora
2010-08-08 15:52 ` [PATCH 18/39] union-mount: Support for union mounting file systems Valerie Aurora
2010-08-08 15:52 ` [PATCH 19/39] union-mount: Implement union lookup Valerie Aurora
2010-08-13 13:49 ` Miklos Szeredi
2010-08-17 21:44 ` Valerie Aurora [this message]
2010-08-18 8:11 ` Miklos Szeredi
2010-08-08 15:52 ` [PATCH 20/39] union-mount: Call do_whiteout() on unlink and rmdir in unions Valerie Aurora
2010-08-08 15:52 ` [PATCH 21/39] union-mount: Copy up directory entries on first readdir() Valerie Aurora
2010-08-08 15:52 ` [PATCH 22/39] union-mount: Add generic_readdir_fallthru() helper Valerie Aurora
2010-08-08 15:52 ` [PATCH 23/39] fallthru: ext2 fallthru support Valerie Aurora
2010-08-13 13:52 ` Miklos Szeredi
2010-08-17 21:08 ` Valerie Aurora
2010-08-17 22:28 ` Valerie Aurora
2010-08-08 15:52 ` [PATCH 24/39] fallthru: jffs2 " Valerie Aurora
2010-08-08 15:52 ` [PATCH 25/39] fallthru: tmpfs " Valerie Aurora
2010-08-08 15:52 ` [PATCH 26/39] VFS: Split inode_permission() and create path_permission() Valerie Aurora
2010-08-08 15:52 ` [PATCH 27/39] VFS: Create user_path_nd() to lookup both parent and target Valerie Aurora
2010-08-08 15:52 ` [PATCH 28/39] union-mount: In-kernel file copyup routines Valerie Aurora
2010-08-08 15:52 ` [PATCH 29/39] union-mount: Implement union-aware access()/faccessat() Valerie Aurora
2010-08-08 15:52 ` [PATCH 30/39] union-mount: Implement union-aware link() Valerie Aurora
2010-08-08 15:52 ` [PATCH 31/39] union-mount: Implement union-aware rename() Valerie Aurora
2010-08-08 15:52 ` [PATCH 32/39] union-mount: Implement union-aware writable open() Valerie Aurora
2010-08-08 15:52 ` [PATCH 33/39] union-mount: Implement union-aware chown() Valerie Aurora
2010-08-08 15:52 ` [PATCH 34/39] union-mount: Implement union-aware truncate() Valerie Aurora
2010-08-08 15:52 ` [PATCH 35/39] union-mount: Implement union-aware chmod()/fchmodat() Valerie Aurora
2010-08-08 15:52 ` [PATCH 36/39] union-mount: Implement union-aware lchown() Valerie Aurora
2010-08-08 15:52 ` [PATCH 37/39] union-mount: Implement union-aware utimensat() Valerie Aurora
2010-08-08 15:52 ` [PATCH 38/39] union-mount: Implement union-aware setxattr() Valerie Aurora
2010-08-08 15:52 ` [PATCH 39/39] union-mount: Implement union-aware lsetxattr() Valerie Aurora
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