Re: [PATCH v6 0/7] Xen transport for 9pfs frontend driver

[Stefano Stabellini]

9pfs maintainers,

The patch series is fully acked, except for the header import from Xen
(http://marc.info/?l=linux-kernel&m=149020945130417&w=2) which needs to
be acked in Xen first (this is corresponding Xen series:
http://marc.info/?l=xen-devel&m=149013482308654).

Once that happens, the series is ready to go in. Are you OK with that?

If so, would you rather have the code go in via your tree or the Xen
tree?

Cheers,

Stefano


On Wed, 22 Mar 2017, Stefano Stabellini wrote:
> 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:
> 
> https://xenbits.xen.org/docs/unstable/misc/9pfs.html
> 
> 
> Changes in v6:
> - add reviewd-bys
> - fix error paths
> - make p9_xen_write_todo return bool
> 
> Changes in v5:
> - test priv->tag instead of ret
> - run checkpatch.pl against the whole series, fix all issues
> - set intf->ring_order appropriately
> - use shorter link to 9pfs spec
> 
> Changes in v4:
> - code style improvements
> - use xenbus_read_unsigned when possible
> - do not leak "versions"
> - introduce BUILD_BUG_ON
> - introduce rwlock to protect the xen_9pfs_devs list
> - add review-by
> 
> 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 |  42 ++++
>  include/xen/interface/io/ring.h | 133 ++++++++++
>  net/9p/Kconfig                  |   8 +
>  net/9p/Makefile                 |   4 +
>  net/9p/trans_xen.c              | 539 ++++++++++++++++++++++++++++++++++++++++
>  5 files changed, 726 insertions(+)
>  create mode 100644 include/xen/interface/io/9pfs.h
>  create mode 100644 net/9p/trans_xen.c
> 
> 
> Cheers,
> 
> Stefano
>