> On May 14, 2016, at 12:29 PM, Steve Dickson <SteveD@xxxxxxxxxx> wrote:
>
>
>
> On 05/04/2016 10:43 AM, Chuck Lever wrote:
>> The kernel NFS client specifies 'rdma' as the transport protocol for
>> NFS/RDMA mounts. This is a generic display token, probably not
>> something the kernel should lie about. The kernel uses it to form
>> NFSv4 client IDs, for example.
>>
>> Until gssd can speak RPC-over-RDMA, convert 'rdma' to 'tcp' in
>> kernel gss upcalls.
>>
>> This means that the Linux NFS client requires an NFS/TCP service on
>> an NFS/RDMA server when establishing a GSS context for proto=rdma
>> mount points. This is probably not an onerous requirement for the
>> time being.
>>
>> Eventually user space support for RPC-over-RDMA might be introduced,
>> and gssd can use that for context establishment.
> Shouldn't we log something tell to the user this is happening??
I don't understand what "this" refers to.
There's no error here, and there's nothing a user or admin
can or should do to change the situation.
What am I missing?
> steved.
>>
>> Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
>> ---
>> utils/gssd/gssd.c | 16 ++++++++++++++++
>> 1 file changed, 16 insertions(+)
>>
>> diff --git a/utils/gssd/gssd.c b/utils/gssd/gssd.c
>> index 7ba27b1..51b2cd7 100644
>> --- a/utils/gssd/gssd.c
>> +++ b/utils/gssd/gssd.c
>> @@ -301,6 +301,22 @@ gssd_read_service_info(int dirfd, struct clnt_info *clp)
>> goto fail;
>> }
>>
>> + /*
>> + * The user space RPC library has no support for
>> + * RPC-over-RDMA at this time, so change 'rdma'
>> + * to 'tcp', and '20049' to '2049'.
>> + */
>> + if (strcmp(protoname, "rdma") == 0) {
>> + free(protoname);
>> + protoname = strdup("tcp");
>> + if (!protoname)
>> + goto fail;
>> + free(port);
>> + port = strdup("2049");
>> + if (!port)
>> + goto fail;
>> + }
>> +
>> if (!gssd_addrstr_to_sockaddr((struct sockaddr *)&clp->addr,
>> address, port ? port : ""))
>> goto fail;
>>
> --
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--
Chuck Lever
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