Re: [Qemu-devel] [PATCHv6 0/6] block: add native support for NFS

[Stefan Hajnoczi <stefanha@redhat.com>]

On Mon, Jan 27, 2014 at 07:28:07PM +0100, Peter Lieven wrote:
> Am 27.01.2014 17:11, schrieb Stefan Hajnoczi:
> > On Mon, Jan 13, 2014 at 11:21:52AM +0100, Peter Lieven wrote:
> >> This adds v6 of the NFS protocol driver + qemu-iotest adjustments.
> >>
> >> v5->v6:
> >>  - use internal qemu function to parse the NFS url [Kevin]
> >>  - zero pad short reads [Kevin, Paolo]
> >>  - added qemu-iotests patches for basic nfs protocol support
> >>
> >> v4->v5:
> >>  - disussed with Ronnie and decided to move URL + Paramter parsing to LibNFS.
> >>    This allows for URL parameter processing directly in LibNFS without altering
> >>    the qemu NFS block driver. This bumps the version requirement for LibNFS
> >>    to 1.9.0 though.
> >>  - added a pointer to the LibNFS readme where additional information about
> >>    ROOT privilidge requirements can be found as this raised a few concerns.
> >>  - removed a trailing dot in an error statement [Fam].
> >>
> >> v3->v4:
> >>  - finally added full implementation of bdrv_get_allocated_file_size [Stefan]
> >>  - removed trailing \n from error statements [Stefan]
> >>
> >> v2->v3:
> >>  - rebased the stefanha/block
> >>  - use pkg_config to check for libnfs (ignoring cflags which are broken in 1.8.0) [Stefan]
> >>  - fixed NFSClient declaration [Stefan]
> >>  - renamed Task variables to task [Stefan]
> >>  - renamed NFSTask to NFSRPC [Ronnie]
> >>  - do not update bs->total_sectors in nfs_co_writev [Stefan]
> >>  - return -ENOMEM on all async call failures [Stefan,Ronnie]
> >>  - fully implement ftruncate
> >>  - use util/uri.c for URL parsing [Stefan]
> >>  - reworked nfs_file_open_common to nfs_client_open which works on NFSClient [Stefan]
> >>  - added a comment ot the connect message that libnfs support NFSv3 only at the moment.
> >>  - DID NOT add full implementation of bdrv_get_allocated_file_size because
> >>    we are not in a coroutine context and I cannot do an async call here.
> >>    I could do a sync call if there would be a guarantee that no requests
> >>    are in flight. [Stefan]
> >>
> >> v1->v2:
> >>  - fixed block/Makefile.objs [Ronnie]
> >>  - do not always register a read handler [Ronnie]
> >>  - add support for reading beyond EOF [Fam]
> >>  - fixed struct and paramter naming [Fam]
> >>  - fixed overlong lines and whitespace errors [Fam]
> >>  - return return status from libnfs whereever possible [Fam]
> >>  - added comment why we set allocated_file_size to -ENOTSUP after write [Fam]
> >>  - avoid segfault when parsing filname [Fam]
> >>  - remove unused close_bh from NFSClient [Fam]
> >>  - avoid dividing and mutliplying total_size by BDRV_SECTOR_SIZE in nfs_file_create [Fam] 
> >>
> >> Peter Lieven (6):
> >>   block: add native support for NFS
> >>   qemu-iotests: change _supported_proto to file for various tests
> >>   qemu-iotests: enable support for NFS protocol
> >>   qemu-iotests: enable test 016 and 025 to work with NFS protocol
> >>   qemu-iotests: fix expected output of test 067
> >>   qemu-iotests: blacklist test 020 for NFS protocol
> >>
> >>  MAINTAINERS                  |    5 +
> >>  block/Makefile.objs          |    1 +
> >>  block/nfs.c                  |  444 ++++++++++++++++++++++++++++++++++++++++++
> >>  configure                    |   26 +++
> >>  qapi-schema.json             |    1 +
> >>  tests/qemu-iotests/013       |    2 +-
> >>  tests/qemu-iotests/014       |    2 +-
> >>  tests/qemu-iotests/016       |    2 +-
> >>  tests/qemu-iotests/018       |    2 +-
> >>  tests/qemu-iotests/019       |    2 +-
> >>  tests/qemu-iotests/020       |    7 +-
> >>  tests/qemu-iotests/023       |    2 +-
> >>  tests/qemu-iotests/024       |    2 +-
> >>  tests/qemu-iotests/025       |    2 +-
> >>  tests/qemu-iotests/026       |    2 +-
> >>  tests/qemu-iotests/028       |    2 +-
> >>  tests/qemu-iotests/031       |    2 +-
> >>  tests/qemu-iotests/034       |    2 +-
> >>  tests/qemu-iotests/036       |    2 +-
> >>  tests/qemu-iotests/037       |    2 +-
> >>  tests/qemu-iotests/038       |    2 +-
> >>  tests/qemu-iotests/039       |    2 +-
> >>  tests/qemu-iotests/043       |    2 +-
> >>  tests/qemu-iotests/046       |    2 +-
> >>  tests/qemu-iotests/052       |    2 +-
> >>  tests/qemu-iotests/054       |    2 +-
> >>  tests/qemu-iotests/059       |    2 +-
> >>  tests/qemu-iotests/060       |    2 +-
> >>  tests/qemu-iotests/061       |    2 +-
> >>  tests/qemu-iotests/063       |    2 +-
> >>  tests/qemu-iotests/067.out   |    8 +-
> >>  tests/qemu-iotests/069       |    2 +-
> >>  tests/qemu-iotests/common    |   22 ++-
> >>  tests/qemu-iotests/common.rc |    3 +
> >>  34 files changed, 534 insertions(+), 33 deletions(-)
> >>  create mode 100644 block/nfs.c
> > Any update on the qemu-iotests changes discussed in this thread?  The
> > actual NFS patch looks fine.
> I would like to leave the rework of patch 5 to the maintainers.
> 
> Maybe you can merge the rest of the series except for this change in patch 2.
> 
> diff --git a/tests/qemu-iotests/020 b/tests/qemu-iotests/020
> index b3c86d8..a42f32f 100755
> --- a/tests/qemu-iotests/020
> +++ b/tests/qemu-iotests/020
> @@ -43,7 +43,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>  
>  # Any format supporting backing files
>  _supported_fmt qcow qcow2 vmdk qed
> -_supported_proto generic
> +_supported_proto file
>  _supported_os Linux
> 
> I blacklist patch 20 for NFS manually in Patch 6 as Fam noticed.

I cloned libnfs (fb6f315257a8752c3a8b96a71261a5613a6f2069) and found it
does not install nfsc/libnfs-raw-mount.h.  Any idea what's going on
here, should the include be dropped from your patch?

qemu_opts_create_nofail() no longer exists (see
87ea75d5e135c0527c6a9dbac4317913409f28c7), the following is needed to
make it compile:
-    opts = qemu_opts_create_nofail(&runtime_opts);
+    opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);

Please send a final cleaned up series.

Thanks,
Stefan