Re: [PATCH 3/6] SUNRPC: Clean up bc_send()

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On Jun 8, 2015, at 4:47 PM, bfields@xxxxxxxxxxxx wrote:

> On Fri, Jun 05, 2015 at 12:02:11PM -0400, Chuck Lever wrote:
>> 
>> On Jun 5, 2015, at 11:50 AM, Andy Adamson <androsadamson@xxxxxxxxx> wrote:
>> 
>>> On Thu, Jun 4, 2015 at 5:26 PM, Trond Myklebust
>>> <trond.myklebust@xxxxxxxxxxxxxxx> wrote:
>>>> From: Chuck Lever <chuck.lever@xxxxxxxxxx>
>>>> 
>>>> Clean up: Merge bc_send() into bc_svc_process().
>>>> 
>>>> Note: even thought this touches svc.c, it is a client-side change.
>>>> 
>>>> Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
>>>> Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
>>>> ---
>>>> include/linux/sunrpc/bc_xprt.h |  1 -
>>>> net/sunrpc/Makefile            |  2 +-
>>>> net/sunrpc/bc_svc.c            | 63 ------------------------------------------
>>>> net/sunrpc/svc.c               | 33 ++++++++++++++++------
>>>> 4 files changed, 26 insertions(+), 73 deletions(-)
>>>> delete mode 100644 net/sunrpc/bc_svc.c
>>>> 
>>>> diff --git a/include/linux/sunrpc/bc_xprt.h b/include/linux/sunrpc/bc_xprt.h
>>>> index 2ca67b55e0fe..8df43c9f11dc 100644
>>>> --- a/include/linux/sunrpc/bc_xprt.h
>>>> +++ b/include/linux/sunrpc/bc_xprt.h
>>>> @@ -37,7 +37,6 @@ void xprt_complete_bc_request(struct rpc_rqst *req, uint32_t copied);
>>>> void xprt_free_bc_request(struct rpc_rqst *req);
>>>> int xprt_setup_backchannel(struct rpc_xprt *, unsigned int min_reqs);
>>>> void xprt_destroy_backchannel(struct rpc_xprt *, unsigned int max_reqs);
>>>> -int bc_send(struct rpc_rqst *req);
>>>> 
>>>> /*
>>>> * Determine if a shared backchannel is in use
>>>> diff --git a/net/sunrpc/Makefile b/net/sunrpc/Makefile
>>>> index 15e6f6c23c5d..1b8e68d0e690 100644
>>>> --- a/net/sunrpc/Makefile
>>>> +++ b/net/sunrpc/Makefile
>>>> @@ -15,6 +15,6 @@ sunrpc-y := clnt.o xprt.o socklib.o xprtsock.o sched.o \
>>>>           sunrpc_syms.o cache.o rpc_pipe.o \
>>>>           svc_xprt.o
>>>> sunrpc-$(CONFIG_SUNRPC_DEBUG) += debugfs.o
>>>> -sunrpc-$(CONFIG_SUNRPC_BACKCHANNEL) += backchannel_rqst.o bc_svc.o
>>>> +sunrpc-$(CONFIG_SUNRPC_BACKCHANNEL) += backchannel_rqst.o
>>>> sunrpc-$(CONFIG_PROC_FS) += stats.o
>>>> sunrpc-$(CONFIG_SYSCTL) += sysctl.o
>>>> diff --git a/net/sunrpc/bc_svc.c b/net/sunrpc/bc_svc.c
>>>> deleted file mode 100644
>>>> index 15c7a8a1c24f..000000000000
>>>> --- a/net/sunrpc/bc_svc.c
>>>> +++ /dev/null
>>>> @@ -1,63 +0,0 @@
>>>> -/******************************************************************************
>>>> -
>>>> -(c) 2007 Network Appliance, Inc.  All Rights Reserved.
>>>> -(c) 2009 NetApp.  All Rights Reserved.
>>>> -
>>>> -NetApp provides this source code under the GPL v2 License.
>>>> -The GPL v2 license is available at
>>>> -http://opensource.org/licenses/gpl-license.php.
>>>> -
>>>> -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
>>>> -"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
>>>> -LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
>>>> -A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
>>>> -CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
>>>> -EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
>>>> -PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
>>>> -PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
>>>> -LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
>>>> -NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
>>>> -SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>>>> -
>>>> -******************************************************************************/
>>> 
>>> Why is the above being removed?
>> 
>> Hi Andy-
>> 
>> Interesting question, and IANAL.
>> 
>> Where should the boilerplate go if the below function is merged into
>> existing generic server code? I suppose we could fold the NetApp
>> copyright into the comment at the top of net/sunrpc/svc.c , but the
>> merged code is paraphrased rather than copied directly.
>> 
>> Suggestions/opinions are welcome.
> 
> I don't know, the above looks like pretty generic boilerplate, and I'd
> rather not accumulate a that kind of thing every time we move a
> significant piece of code around.  Could we compromise by adding a line
> or two to net/sunrpc/svc.c following the existing convention there?
> ("backchannel implementation originally (c) 2007 Network Appliance and
> (c) 2009 Netapp", or similar?)  Not a lawyer either, just looking for a
> way to keep it both honest and concise….

Yes, that’s exactly what I was thinking. Sorry I wasn’t clear.

--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com



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