On Mon, 2014-08-18 at 16:22 +1000, NeilBrown wrote: > If requests are being sent to the local host, then NFS will > need to take care to avoid deadlocks. > > So keep track when accepting a connection or sending a UDP request > and set a flag in the svc_xprt when the peer connected to is local. > > The interface rpc_is_foreign() is provided to check is a given client > is connected to a foreign server. When it returns zero it is either > not connected or connected to a local server and in either case > greater care is needed. > > Signed-off-by: NeilBrown <neilb@xxxxxxx> > --- > include/linux/sunrpc/clnt.h | 1 + > include/linux/sunrpc/xprt.h | 1 + > net/sunrpc/clnt.c | 25 +++++++++++++++++++++++++ > net/sunrpc/xprtsock.c | 9 +++++++++ > 4 files changed, 36 insertions(+) > > diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h > index 70736b98c721..cd79b2a28ceb 100644 > --- a/include/linux/sunrpc/clnt.h > +++ b/include/linux/sunrpc/clnt.h > @@ -175,6 +175,7 @@ void rpc_force_rebind(struct rpc_clnt *); > size_t rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t); > const char *rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t); > int rpc_localaddr(struct rpc_clnt *, struct sockaddr *, size_t); > +int rpc_is_foreign(struct rpc_clnt *); > > #endif /* __KERNEL__ */ > #endif /* _LINUX_SUNRPC_CLNT_H */ > diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h > index fcbfe8783243..6a9dffcb9d3f 100644 > --- a/include/linux/sunrpc/xprt.h > +++ b/include/linux/sunrpc/xprt.h > @@ -357,6 +357,7 @@ int xs_swapper(struct rpc_xprt *xprt, int enable); > #define XPRT_CONNECTION_ABORT (7) > #define XPRT_CONNECTION_CLOSE (8) > #define XPRT_CONGESTED (9) > +#define XPRT_LOCAL (10) > Can we please rename that to XPRT_LOOPBACK or something along those lines? To me XPRT_LOCAL looks a little too close for comfort to AF_LOCAL, which is also a supported transport. -- Trond Myklebust Linux NFS client maintainer, PrimaryData trond.myklebust@xxxxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
