Hi Anthony, currently QEMU 1.1 doesn't compile virtfs correctly on Ubuntu: qemu/hw/9pfs/virtio-9p-handle.c: In function ‘handle_update_file_cred’: qemu/hw/9pfs/virtio-9p-handle.c:66:58: error: ‘AT_EMPTY_PATH’ undeclared (first use in this function) qemu/hw/9pfs/virtio-9p-handle.c:66:58: note: each undeclared identifier is reported only once for each function it appears in qemu/hw/9pfs/virtio-9p-handle.c: In function ‘handle_lstat’: qemu/hw/9pfs/virtio-9p-handle.c:87:34: error: ‘AT_EMPTY_PATH’ undeclared (first use in this function) qemu/hw/9pfs/virtio-9p-handle.c: In function ‘handle_symlink’: qemu/hw/9pfs/virtio-9p-handle.c:314:62: error: ‘AT_EMPTY_PATH’ undeclared (first use in this function) qemu/hw/9pfs/virtio-9p-handle.c: In function ‘handle_link’: qemu/hw/9pfs/virtio-9p-handle.c:337:45: error: ‘AT_EMPTY_PATH’ undeclared (first use in this function) qemu/hw/9pfs/virtio-9p-handle.c: In function ‘handle_chown’: qemu/hw/9pfs/virtio-9p-handle.c:373:58: error: ‘AT_EMPTY_PATH’ undeclared (first use in this function)
a patch was sent on the 24th of Feb to fix the issue (also see below): http://marc.info/?l=qemu-devel&m=133011313912147 Even though it is not particularly pretty, in the absence of better alternatives it should probably be applied. Cheers, Stefano On Fri, 24 Feb 2012, Serge Hallyn wrote: > If AT_EMPTY_PATH is not in one of the included files, go ahead and > define it. qemu won't compile on ubuntu for me without this. > > (Note - alternatively we could #include <linux/fcntl.h> to pick > up the definitions there) > > Signed-off-by: Serge Hallyn <serge.hal...@canonical.com> > --- > hw/9pfs/virtio-9p-handle.c | 9 +++++++++ > 1 files changed, 9 insertions(+), 0 deletions(-) > > diff --git a/hw/9pfs/virtio-9p-handle.c b/hw/9pfs/virtio-9p-handle.c > index f96d17a..e403a84 100644 > --- a/hw/9pfs/virtio-9p-handle.c > +++ b/hw/9pfs/virtio-9p-handle.c > @@ -39,6 +39,15 @@ > #ifndef BTRFS_SUPER_MAGIC > #define BTRFS_SUPER_MAGIC 0x9123683E > #endif > +#ifndef AT_REMOVEDIR > +#define AT_REMOVEDIR 0x200 > +#endif > +#ifndef AT_EMPTY_PATH > +#define AT_EMPTY_PATH 0x1000 /* Allow empty relative pathname */ > +#endif > +#ifndef O_PATH > +#define O_PATH 010000000 > +#endif > > struct handle_data { > int mountfd; > -- > 1.7.9 > >