[Xen-devel] [PATCH v4 0/8] xen/9pfs: introduce the Xen 9pfs backend

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

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 backend, which typically runs in
Dom0. I sent another series to implement the frontend in Linux
(http://marc.info/?l=linux-kernel&m=148883047125960&w=2).

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

https://xenbits.xen.org/docs/unstable/misc/9pfs.html


Changes in v4:
- add reviewed-bys
- remove useless if(NULL) checks around g_free
- g_free g_malloc'ed sgs
- remove XEN_9PFS_RING_ORDER, make the ring order dynamic per ring,
  reading the ring_order field in xen_9pfs_data_intf
- remove patch not to build Xen backends on non-Xen capable targets
  because it is already upstream

Changes in v3:
- do not build backends for targets that do not support xen
- remove xen_9pfs.h, merge its content into xen-9p-backend.c
- remove xen_9pfs_header, introduce P9MsgHeader
- use le32_to_cpu to access P9MsgHeader fields
- many coding style fixes
- run checkpatch on all patches
- add check if num_rings < 1
- use g_strdup_printf
- free fsdev_id in xen_9pfs_free
- add comments

Changes in v2:
- fix coding style
- compile xen-9p-backend.c if CONFIG_XEN_BACKEND
- add patch to set CONFIG_XEN_BACKEND only for the right targets
- add review-bys


Stefano Stabellini (8):
      xen: import ring.h from xen
      9p: introduce a type for the 9p header
      xen/9pfs: introduce Xen 9pfs backend
      xen/9pfs: connect to the frontend
      xen/9pfs: receive requests from the frontend
      xen/9pfs: implement in/out_iov_from_pdu and vmarshal/vunmarshal
      xen/9pfs: send responses back to the frontend
      xen/9pfs: build and register Xen 9pfs backend

 hw/9pfs/9p.h                 |   6 +
 hw/9pfs/Makefile.objs        |   1 +
 hw/9pfs/virtio-9p-device.c   |   6 +-
 hw/9pfs/xen-9p-backend.c     | 444 +++++++++++++++++++++++++++++++++++++++++
 hw/block/xen_blkif.h         |   2 +-
 hw/usb/xen-usb.c             |   2 +-
 hw/xen/xen_backend.c         |   3 +
 include/hw/xen/io/ring.h     | 455 +++++++++++++++++++++++++++++++++++++++++++
 include/hw/xen/xen_backend.h |   3 +
 9 files changed, 915 insertions(+), 7 deletions(-)
 create mode 100644 hw/9pfs/xen-9p-backend.c
 create mode 100644 include/hw/xen/io/ring.h

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