From 38a417cc993f4535548e47207f9894e7c27e05e4 Mon Sep 17 00:00:00 2001 From: Tom Tucker Date: Sun, 30 Dec 2007 21:07:36 -0600 Subject: svc: Add xpo_accept transport function Previously, the accept logic looked into the socket state to determine whether to call accept or recv when data-ready was indicated on an endpoint. Since some transports don't use sockets, this logic now uses a flag bit (SK_LISTENER) to identify listening endpoints. A transport function (xpo_accept) allows each transport to define its own accept processing. A transport's initialization logic is reponsible for setting the SK_LISTENER bit. I didn't see any way to do this in transport independent logic since the passive side of a UDP connection doesn't listen and always recv's. In the svc_recv function, if the SK_LISTENER bit is set, the transport xpo_accept function is called to handle accept processing. Note that all functions are defined even if they don't make sense for a given transport. For example, accept doesn't mean anything for UDP. The function is defined anyway and bug checks if called. The UDP transport should never set the SK_LISTENER bit. Signed-off-by: Tom Tucker Acked-by: Neil Brown Reviewed-by: Chuck Lever Reviewed-by: Greg Banks Signed-off-by: J. Bruce Fields --- include/linux/sunrpc/svc_xprt.h | 1 + include/linux/sunrpc/svcsock.h | 1 + 2 files changed, 2 insertions(+) (limited to 'include/linux/sunrpc') diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h index 85df97acc2d0..31a44f441fd1 100644 --- a/include/linux/sunrpc/svc_xprt.h +++ b/include/linux/sunrpc/svc_xprt.h @@ -10,6 +10,7 @@ #include struct svc_xprt_ops { + struct svc_xprt *(*xpo_accept)(struct svc_xprt *); int (*xpo_has_wspace)(struct svc_xprt *); int (*xpo_recvfrom)(struct svc_rqst *); void (*xpo_prep_reply_hdr)(struct svc_rqst *); diff --git a/include/linux/sunrpc/svcsock.h b/include/linux/sunrpc/svcsock.h index 08e78d0a364f..9882ce0ee33c 100644 --- a/include/linux/sunrpc/svcsock.h +++ b/include/linux/sunrpc/svcsock.h @@ -36,6 +36,7 @@ struct svc_sock { #define SK_DEFERRED 8 /* request on sk_deferred */ #define SK_OLD 9 /* used for temp socket aging mark+sweep */ #define SK_DETACHED 10 /* detached from tempsocks list */ +#define SK_LISTENER 11 /* listening endpoint */ atomic_t sk_reserved; /* space on outq that is reserved */ -- cgit v1.2.3