On Mar 3, 2010, at 8:46 PM, Yonggang Liu wrote:
> Hello all,
>
> I'm pretty new to PVFS2, and now I'm doing a project about implementing
> interposed scheduler between the PVFS2 clients and PVFS2 servers to provide
> QoS. So I have read some code and doc about the PVFS2 protocols. But for a
> couple of days I get confused about one part of the code,
> In src/proto/PINT-le-bytefield.c, function lebf_encode_req(), we have:
> #define CASE(tag,var) \
> case tag: encode_PVFS_servreq_##var(p,&req->u.var); break
>
> switch (req->op) {
>
> /* call standard function defined in headers */
> CASE(PVFS_SERV_LOOKUP_PATH, lookup_path);
> CASE(PVFS_SERV_CREATE, create);
> CASE(PVFS_SERV_UNSTUFF, unstuff);
> CASE(PVFS_SERV_BATCH_CREATE, batch_create);
> CASE(PVFS_SERV_BATCH_REMOVE, batch_remove);
> CASE(PVFS_SERV_REMOVE, remove);
> ......
> This means these functions exist to be called:
> encode_PVFS_servreq_lookup_path(p, &req->u.lookup_path);
> encode_PVFS_servreq_create(p, &req->u.create);
> ......
> But I was confused that I couldn't find the definition of the above functions
> anywhere in the code. So can anyone help me to figure out the way they are
> defined? (Sorry, this is really a silly question caused by my poor C language
> skills ...) Thanks.
Look in src/proto/pvfs2-req-proto.h. The macro: endecode_fields_5_struct
defines encode_PVFS_servreq_create.
>
> Also, I am wondering if some one has a good documentation describing the
> PVFS2 network protocols. I would really appreciate it if you can share it
> with me.
BMI is described in this paper:
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.60.2472
-sam
>
>
> Thank you very much,
>
> --
> Yonggang Liu
> Advanced Computing and Information Systems Laboratory
> University of Florida
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