Re: UnionMount status?

[Valerie Aurora <vaurora@redhat.com>]

On Wed, Aug 11, 2010 at 12:08:38PM +0200, Michal Suchanek wrote:
> On 10 August 2010 18:52, Valerie Aurora <vaurora@redhat.com> wrote:
> > On Mon, Jul 19, 2010 at 06:06:36PM +0200, Michal Suchanek wrote:
> >> On 14 July 2010 21:30, Valerie Aurora <vaurora@redhat.com> wrote:
> >> > On Wed, Jul 14, 2010 at 03:12:28PM +0200, Michal Suchanek wrote:
> >> >> Hello
> >> >>
> >> >> FWIW I tried to apply the unionmount patch from submounts branch to my
> >> >> kernel (2.6.34 Debian kernel) and boot a live system using the kernel.
> >> >>
> >> >> The system boots but locks up during init.
> >> >>
> >> >> The first boot method uses tmpfs union/squashfs/loop/FUSE(httpfs) or
> >> >> tmpfs union/squashfs/loop/iso9660/loop/FUSE(httpfs) and triggers the
> >> >> BUG_ON(*next_ud != NULL); in union_add_dir when udev starts whereas
> >> >> the other method which uses tmpfs union/squashfs/loop/iso966/iscsi
> >> >> crashes because at the point when iscsid is started during boot as the
> >> >> iscsi drive is disconnected for some reason.
> >> >
> >> > Thanks for the bug report! ??I will get to work on that as soon as
> >> > possible.
> >> >
> >> >> As the kernel does not include aufs I cannot easily test that it works
> >> >> as expected with that but both boot methods used to work with 2.6.32
> >> >> kernels and aufs.
> >> >
> >> > I think it's quite likely the problem is with union mounts, so don't
> >> > go to the effort to test aufs just for this case.
> >> >
> >>
> >> If you want the live CD or more details about the issue I guess I can send them.
> >>
> >> Also the CD build system is automated so it's quite easy to try new patches.
> >
> > Can you try the d_ino_lookup branch in the union mounts git tree? ??I
> > fixed one bug that may be related. ??Thanks,
> >
> > -VAL
> >
> 
> It does not build for me.
> 
> Thanks
> 
> Michal
> 
>   CC      fs/namei.o
>   CC      security/keys/gc.o
>   CC      ipc/util.o
> fs/namei.c: In function ???__lookup_union???:
> fs/namei.c:820: error: ???struct dentry??? has no member named ???d_union_dir???
> fs/namei.c:831: error: ???struct dentry??? has no member named ???d_union_dir???
> fs/namei.c:831: error: dereferencing pointer to incomplete type
> fs/namei.c:832: error: dereferencing pointer to incomplete type
> fs/namei.c:834: error: dereferencing pointer to incomplete type
> fs/namei.c:878: warning: assignment makes integer from pointer without a cast
> fs/namei.c:886: warning: assignment makes integer from pointer without a cast
> fs/namei.c:890: error: dereferencing pointer to incomplete type
> fs/namei.c:816: warning: unused variable ???parent???
> fs/namei.c: In function ???open_union_copyup???:
> fs/namei.c:1921: warning: assignment makes integer from pointer without a cast
> fs/namei.c:1923: warning: assignment makes integer from pointer without a cast
> fs/namei.c: In function ???sys_linkat???:
> fs/namei.c:2998: warning: assignment makes integer from pointer without a cast
> fs/namei.c: In function ???sys_renameat???:
> fs/namei.c:3267: warning: assignment makes integer from pointer without a cast
> make[3]: *** [fs/namei.o] Error 1
> make[2]: *** [fs] Error 2
> make[2]: *** Waiting for unfinished jobs....

Thanks for attaching your .config.  CONFIG_UNION_MOUNT wasn't set:

# CONFIG_UNION_MOUNT is not set

Try rebuilding with that on.  Yes, it should build without
CONFIG_UNION_MOUNT and I'll test that for next release.

-VAL