svn commit: samba r10661 - in branches/tmp/vl-cluster/source: include lib smbd

[vlendec at samba.org]

Author: vlendec
Date: 2005-09-30 21:36:59 +0000 (Fri, 30 Sep 2005)
New Revision: 10661

WebSVN: http://websvn.samba.org/cgi-bin/viewcvs.cgi?view=rev&root=samba&rev=10661

Log:
Next round of messages.c. Now I start to be like it, the client is quite
simple.

General idea: Every messaging client has a unix datagram socket open in
lock_path("messaging") where it sends and receives direct messages from. It
also connects to a unix stream socket in the same directory that a dispatch
daemon listens on.

Anybody interested (Jeremy?) might look at message_send_pid and
message_dispatch, they have become really simple. message_send_pid() tries to
directly send non-blocking and falls back to a blocking write to the stream
socket if the non-blocking call would fail for any reason.

One source of complexity is safe startup of the dispatch daemon. The first one
to do a message_init() tries to connect to the socket. If that fails, we can't
directly unlink() and bind() to establish that, as this would open us for
races. Thus I'm protecting that by an exclusive fcntl lock on the pid file
that is created.

Volker

Modified:
   branches/tmp/vl-cluster/source/include/messages.h
   branches/tmp/vl-cluster/source/lib/messages.c
   branches/tmp/vl-cluster/source/lib/util.c
   branches/tmp/vl-cluster/source/smbd/server.c


Changeset:
Sorry, the patch is too large (802 lines) to include; please use WebSVN to see it!
WebSVN: http://websvn.samba.org/cgi-bin/viewcvs.cgi?view=rev&root=samba&rev=10661