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[PATCH v2 00/13] introduce the Xen PV Calls frontend

From Stefano Stabellini <sstabellini@kernel.org>
Newsgroups linux.kernel
Subject [PATCH v2 00/13] introduce the Xen PV Calls frontend
Date 2017-07-25 23:30 +0200
Message-ID <u7fyV-8aW-3@gated-at.bofh.it> (permalink)
Organization linux.* mail to news gateway

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Hi all,

this series introduces the frontend for the newly introduced PV Calls
procotol.

PV Calls is a paravirtualized protocol that allows the implementation of
a set of POSIX functions in a different domain. The PV Calls frontend
sends POSIX function calls to the backend, which implements them and
returns a value to the frontend and acts on the function call.

For more information about PV Calls, please read:

https://xenbits.xen.org/docs/unstable/misc/pvcalls.html

This patch series only implements the frontend driver. It doesn't
attempt to redirect POSIX calls to it. The functions exported in
pvcalls-front.h are meant to be used for that. A separate patch series
will be sent to use them and hook them into the system.


Changes in v2:
- use xenbus_read_unsigned when possible
- call dev_set_drvdata earlier in pvcalls_front_probe not to dereference
  a NULL pointer in the error path
- set ret appropriately in pvcalls_front_probe
- include pvcalls-front.h in pvcalls-front.c
- call wake_up only once after the consuming loop in pvcalls_front_event_handler
- don't leak "bytes" in case of errors in create_active
- call spin_unlock appropriately in case of errors in create_active
- remove all BUG_ONs
- don't leak newsock->sk in pvcalls_front_accept in case of errors
- rename PVCALLS_FRON_MAX_SPIN to PVCALLS_FRONT_MAX_SPIN
- return bool from pvcalls_front_read_todo
- add a barrier after setting PVCALLS_FLAG_POLL_RET in
  pvcalls_front_event_handler
- remove outdated comment in pvcalls_front_free_map
- clear sock->sk->sk_send_head later in pvcalls_front_release
- make XEN_PVCALLS_FRONTEND tristate
- don't add an empty resume function


Stefano Stabellini (13):
      xen/pvcalls: introduce the pvcalls xenbus frontend
      xen/pvcalls: connect to the backend
      xen/pvcalls: implement socket command and handle events
      xen/pvcalls: implement connect command
      xen/pvcalls: implement bind command
      xen/pvcalls: implement listen command
      xen/pvcalls: implement accept command
      xen/pvcalls: implement sendmsg
      xen/pvcalls: implement recvmsg
      xen/pvcalls: implement poll command
      xen/pvcalls: implement release command
      xen/pvcalls: implement frontend disconnect
      xen: introduce a Kconfig option to enable the pvcalls frontend

 drivers/xen/Kconfig         |    9 +
 drivers/xen/Makefile        |    1 +
 drivers/xen/pvcalls-front.c | 1103 +++++++++++++++++++++++++++++++++++++++++++
 drivers/xen/pvcalls-front.h |   28 ++
 4 files changed, 1141 insertions(+)
 create mode 100644 drivers/xen/pvcalls-front.c
 create mode 100644 drivers/xen/pvcalls-front.h

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[PATCH v2 00/13] introduce the Xen PV Calls frontend Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
  [PATCH v2 13/13] xen: introduce a Kconfig option to enable the pvcalls frontend Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
  [PATCH v2 10/13] xen/pvcalls: implement poll command Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
    Re: [PATCH v2 10/13] xen/pvcalls: implement poll command Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-27 01:30 +0200
      Re: [PATCH v2 10/13] xen/pvcalls: implement poll command Stefano Stabellini <sstabellini@kernel.org> - 2017-07-27 02:30 +0200
  [PATCH v2 06/13] xen/pvcalls: implement listen command Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
  [PATCH v2 07/13] xen/pvcalls: implement accept command Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
    Re: [PATCH v2 07/13] xen/pvcalls: implement accept command Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-26 20:00 +0200
      Re: [PATCH v2 07/13] xen/pvcalls: implement accept command Stefano Stabellini <sstabellini@kernel.org> - 2017-07-27 01:30 +0200
  [PATCH v2 01/13] xen/pvcalls: introduce the pvcalls xenbus frontend Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
    [PATCH v2 12/13] xen/pvcalls: implement frontend disconnect Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
    [PATCH v2 05/13] xen/pvcalls: implement bind command Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
      Re: [PATCH v2 05/13] xen/pvcalls: implement bind command Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-26 17:00 +0200
        Re: [PATCH v2 05/13] xen/pvcalls: implement bind command Stefano Stabellini <sstabellini@kernel.org> - 2017-07-27 02:00 +0200
          Re: [PATCH v2 05/13] xen/pvcalls: implement bind command Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-27 16:50 +0200
    [PATCH v2 04/13] xen/pvcalls: implement connect command Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
      Re: [PATCH v2 04/13] xen/pvcalls: implement connect command Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-26 17:00 +0200
        Re: [PATCH v2 04/13] xen/pvcalls: implement connect command Stefano Stabellini <sstabellini@kernel.org> - 2017-07-27 01:30 +0200
    [PATCH v2 09/13] xen/pvcalls: implement recvmsg Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
      Re: [PATCH v2 09/13] xen/pvcalls: implement recvmsg Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-26 23:30 +0200
        Re: [Xen-devel] [PATCH v2 09/13] xen/pvcalls: implement recvmsg Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-26 23:40 +0200
          Re: [Xen-devel] [PATCH v2 09/13] xen/pvcalls: implement recvmsg Stefano Stabellini <sstabellini@kernel.org> - 2017-07-27 02:10 +0200
            Re: [Xen-devel] [PATCH v2 09/13] xen/pvcalls: implement recvmsg Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-27 17:00 +0200
    [PATCH v2 11/13] xen/pvcalls: implement release command Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
      Re: [PATCH v2 11/13] xen/pvcalls: implement release command Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-27 20:40 +0200
    [PATCH v2 02/13] xen/pvcalls: connect to the backend Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
      Re: [PATCH v2 02/13] xen/pvcalls: connect to the backend Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-26 15:40 +0200
        Re: [PATCH v2 02/13] xen/pvcalls: connect to the backend Stefano Stabellini <sstabellini@kernel.org> - 2017-07-27 02:30 +0200
          Re: [PATCH v2 02/13] xen/pvcalls: connect to the backend Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-27 17:10 +0200
    [PATCH v2 03/13] xen/pvcalls: implement socket command and handle events Stefano Stabellini <sstabellini@kernel.org> - 2017-07-25 23:30 +0200
      Re: [PATCH v2 03/13] xen/pvcalls: implement socket command and handle  events Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-07-26 16:30 +0200
        Re: [PATCH v2 03/13] xen/pvcalls: implement socket command and handle  events Stefano Stabellini <sstabellini@kernel.org> - 2017-07-27 01:20 +0200

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