[SSI-devel] Re: [PATCH][2.6] af_unix.c

[Brian J. W. <Bri...@hp...>]

Krishnakumar. R wrote:
> Hi Brian,
> 
> Here is the patch for using the new parameters for the 
> ssi_unix_stream_sendmsg. The fix seems to be trivial.
> Hence doubt whether it is proper.

Your instinct is correct. The real challenge is to package up the kiocb 
argument to unix_stream_connect(), send it to the listening socket's 
node, completely reconstruct the kiocb structure on that node (at least 
well enough to work correctly), and call unix_stream_connect() with it 
(and the other args).

> I had the following queries also:
> 
> ssi_unix_stream_sendmsg defined in include/cluster/ssi/unix.h
> calls rmtunix_stream_connect which inturn calls RMTUNIXSVR_STREAM_CONNECT.
> Now this RMTUNIXSVR_STREAM_CONNECT does not seems 
> to be defined anywhere in the ssi cvs code. 
> Am I missing something ?

RMTUNIXSVR_STREAM_CONNECT() is a generated function that:

1. encodes the data into a RPC (remote procedure call)
2. calls the necessary ICS routines to send it to the other node
3. decodes the data over there
4. calls rmtunixsvr_stream_connect() (notice it's the same name with 
small caps)
5. encodes the return value and any parameters marked as 'OUT' in the 
rmtunixsvr_stream_connect definition in cluster/ssi/ipc/unixnm.svc
6. decodes the data on the original node and returns it to the caller

To generate it (and all other generated functions):

1. Copy openssi/kernel.configs/kernel-ssi-2.6.8.1-i686-smp.config into 
.config
2. Run `make oldconfig'
3. Run `make prepare-all'

You'll find the generated files in include/cluster/gen.

Good luck,

Brian