[PATCH v3 0/7] Xen transport for 9pfs frontend driver

[PATCH v3 0/7] Xen transport for 9pfs frontend driver

[Stefano Stabellini]

Hi all,

This patch series implements a new transport for 9pfs, aimed at Xen
systems.

The transport is based on a traditional Xen frontend and backend drivers
pair. This patch series implements the frontend, which typically runs in
a regular unprivileged guest.

I also sent a series that implements the backend in userspace in QEMU,
which typically runs in Dom0 (but could also run in a another guest).

The frontend complies to the Xen transport for 9pfs specification
version 1, available here:

http://xenbits.xen.org/gitweb/?p=xen.git;a=blob_plain;f=docs/misc/9pfs.markdown;hb=HEAD


Changes in v3:
- add full copyright header to trans_xen.c
- rename ring->ring to ring->data
- handle gnttab_grant_foreign_access errors
- remove ring->bytes
- wrap long lines
- add reviewed-by

Changes in v2:
- use XEN_PAGE_SHIFT instead of PAGE_SHIFT
- remove unnecessary initializations
- fix error paths
- fix memory allocations for 64K kernels
- simplify p9_xen_create and p9_xen_close
- use virt_XXX barriers
- set status = REQ_STATUS_ERROR inside the p9_xen_response loop
- add in-code comments


Stefano Stabellini (7):
      xen: import new ring macros in ring.h
      xen: introduce the header file for the Xen 9pfs transport protocol
      xen/9pfs: introduce Xen 9pfs transport driver
      xen/9pfs: connect to the backend
      xen/9pfs: send requests to the backend
      xen/9pfs: receive responses
      xen/9pfs: build 9pfs Xen transport driver

 include/xen/interface/io/9pfs.h |  40 ++++
 include/xen/interface/io/ring.h | 131 +++++++++++
 net/9p/Kconfig                  |   8 +
 net/9p/Makefile                 |   4 +
 net/9p/trans_xen.c              | 497 ++++++++++++++++++++++++++++++++++++++++
 5 files changed, 680 insertions(+)
 create mode 100644 include/xen/interface/io/9pfs.h
 create mode 100644 net/9p/trans_xen.c


Cheers,

Stefano

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Re: [PATCH v3 0/7] Xen transport for 9pfs frontend driver

[Stefano Stabellini]

On Wed, 15 Mar 2017, Greg Kurz wrote:
> On Mon, 13 Mar 2017 16:50:05 -0700 (PDT)
> Stefano Stabellini <sstabellini@kernel.org> wrote:
> 
> > Hi all,
> > 
> > This patch series implements a new transport for 9pfs, aimed at Xen
> > systems.
> > 
> 
> Hi Stefano,
> 
> For some reason, this series (and previous versions) only partially made it to
> v9fs-developer@lists.sourceforge.net. Please Cc: me if you're to send a v4.

I'll do, sorry about that, I bet it's because I am not subscribed.
However, the series is on the LKML too:
http://marc.info/?l=linux-kernel&m=148944902331334&w=2 

Thanks for the reviews!



> --
> Greg
> 
> > The transport is based on a traditional Xen frontend and backend drivers
> > pair. This patch series implements the frontend, which typically runs in
> > a regular unprivileged guest.
> > 
> > I also sent a series that implements the backend in userspace in QEMU,
> > which typically runs in Dom0 (but could also run in a another guest).
> > 
> > The frontend complies to the Xen transport for 9pfs specification
> > version 1, available here:
> > 
> > http://xenbits.xen.org/gitweb/?p=xen.git;a=blob_plain;f=docs/misc/9pfs.markdown;hb=HEAD
> > 
> > 
> > Changes in v3:
> > - add full copyright header to trans_xen.c
> > - rename ring->ring to ring->data
> > - handle gnttab_grant_foreign_access errors
> > - remove ring->bytes
> > - wrap long lines
> > - add reviewed-by
> > 
> > Changes in v2:
> > - use XEN_PAGE_SHIFT instead of PAGE_SHIFT
> > - remove unnecessary initializations
> > - fix error paths
> > - fix memory allocations for 64K kernels
> > - simplify p9_xen_create and p9_xen_close
> > - use virt_XXX barriers
> > - set status = REQ_STATUS_ERROR inside the p9_xen_response loop
> > - add in-code comments
> > 
> > 
> > Stefano Stabellini (7):
> >       xen: import new ring macros in ring.h
> >       xen: introduce the header file for the Xen 9pfs transport protocol
> >       xen/9pfs: introduce Xen 9pfs transport driver
> >       xen/9pfs: connect to the backend
> >       xen/9pfs: send requests to the backend
> >       xen/9pfs: receive responses
> >       xen/9pfs: build 9pfs Xen transport driver
> > 
> >  include/xen/interface/io/9pfs.h |  40 ++++
> >  include/xen/interface/io/ring.h | 131 +++++++++++
> >  net/9p/Kconfig                  |   8 +
> >  net/9p/Makefile                 |   4 +
> >  net/9p/trans_xen.c              | 497 ++++++++++++++++++++++++++++++++++++++++
> >  5 files changed, 680 insertions(+)
> >  create mode 100644 include/xen/interface/io/9pfs.h
> >  create mode 100644 net/9p/trans_xen.c
> > 
> > 
> > Cheers,
> > 
> > Stefano
> > 
> 
> 
> 

Re: [PATCH v3 0/7] Xen transport for 9pfs frontend driver

[Greg Kurz]

[-- Attachment #1: Type: text/plain, Size: 2336 bytes --]

On Mon, 13 Mar 2017 16:50:05 -0700 (PDT)
Stefano Stabellini <sstabellini@kernel.org> wrote:

> Hi all,
> 
> This patch series implements a new transport for 9pfs, aimed at Xen
> systems.
> 

Hi Stefano,

For some reason, this series (and previous versions) only partially made it to
v9fs-developer@lists.sourceforge.net. Please Cc: me if you're to send a v4.

Cheers.

--
Greg

> The transport is based on a traditional Xen frontend and backend drivers
> pair. This patch series implements the frontend, which typically runs in
> a regular unprivileged guest.
> 
> I also sent a series that implements the backend in userspace in QEMU,
> which typically runs in Dom0 (but could also run in a another guest).
> 
> The frontend complies to the Xen transport for 9pfs specification
> version 1, available here:
> 
> http://xenbits.xen.org/gitweb/?p=xen.git;a=blob_plain;f=docs/misc/9pfs.markdown;hb=HEAD
> 
> 
> Changes in v3:
> - add full copyright header to trans_xen.c
> - rename ring->ring to ring->data
> - handle gnttab_grant_foreign_access errors
> - remove ring->bytes
> - wrap long lines
> - add reviewed-by
> 
> Changes in v2:
> - use XEN_PAGE_SHIFT instead of PAGE_SHIFT
> - remove unnecessary initializations
> - fix error paths
> - fix memory allocations for 64K kernels
> - simplify p9_xen_create and p9_xen_close
> - use virt_XXX barriers
> - set status = REQ_STATUS_ERROR inside the p9_xen_response loop
> - add in-code comments
> 
> 
> Stefano Stabellini (7):
>       xen: import new ring macros in ring.h
>       xen: introduce the header file for the Xen 9pfs transport protocol
>       xen/9pfs: introduce Xen 9pfs transport driver
>       xen/9pfs: connect to the backend
>       xen/9pfs: send requests to the backend
>       xen/9pfs: receive responses
>       xen/9pfs: build 9pfs Xen transport driver
> 
>  include/xen/interface/io/9pfs.h |  40 ++++
>  include/xen/interface/io/ring.h | 131 +++++++++++
>  net/9p/Kconfig                  |   8 +
>  net/9p/Makefile                 |   4 +
>  net/9p/trans_xen.c              | 497 ++++++++++++++++++++++++++++++++++++++++
>  5 files changed, 680 insertions(+)
>  create mode 100644 include/xen/interface/io/9pfs.h
>  create mode 100644 net/9p/trans_xen.c
> 
> 
> Cheers,
> 
> Stefano
> 



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[PATCH v3 0/7] Xen transport for 9pfs frontend driver

[Stefano Stabellini]

Hi all,

This patch series implements a new transport for 9pfs, aimed at Xen
systems.

The transport is based on a traditional Xen frontend and backend drivers
pair. This patch series implements the frontend, which typically runs in
a regular unprivileged guest.

I also sent a series that implements the backend in userspace in QEMU,
which typically runs in Dom0 (but could also run in a another guest).

The frontend complies to the Xen transport for 9pfs specification
version 1, available here:

http://xenbits.xen.org/gitweb/?p=xen.git;a=blob_plain;f=docs/misc/9pfs.markdown;hb=HEAD


Changes in v3:
- add full copyright header to trans_xen.c
- rename ring->ring to ring->data
- handle gnttab_grant_foreign_access errors
- remove ring->bytes
- wrap long lines
- add reviewed-by

Changes in v2:
- use XEN_PAGE_SHIFT instead of PAGE_SHIFT
- remove unnecessary initializations
- fix error paths
- fix memory allocations for 64K kernels
- simplify p9_xen_create and p9_xen_close
- use virt_XXX barriers
- set status = REQ_STATUS_ERROR inside the p9_xen_response loop
- add in-code comments


Stefano Stabellini (7):
      xen: import new ring macros in ring.h
      xen: introduce the header file for the Xen 9pfs transport protocol
      xen/9pfs: introduce Xen 9pfs transport driver
      xen/9pfs: connect to the backend
      xen/9pfs: send requests to the backend
      xen/9pfs: receive responses
      xen/9pfs: build 9pfs Xen transport driver

 include/xen/interface/io/9pfs.h |  40 ++++
 include/xen/interface/io/ring.h | 131 +++++++++++
 net/9p/Kconfig                  |   8 +
 net/9p/Makefile                 |   4 +
 net/9p/trans_xen.c              | 497 ++++++++++++++++++++++++++++++++++++++++
 5 files changed, 680 insertions(+)
 create mode 100644 include/xen/interface/io/9pfs.h
 create mode 100644 net/9p/trans_xen.c


Cheers,

Stefano