From 2ea24497a1b30dd03dd42b873fa5097913587f4d Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 10 Feb 2014 11:18:39 -0500 Subject: SUNRPC: RPC callbacks may be split across several TCP segments Since TCP is a stream protocol, our callback read code needs to take into account the fact that RPC callbacks are not always confined to a single TCP segment. This patch adds support for multiple TCP segments by ensuring that we only remove the rpc_rqst structure from the 'free backchannel requests' list once the data has been completely received. We rely on the fact that TCP data is ordered for the duration of the connection. Reported-by: shaobingqing Signed-off-by: Trond Myklebust --- include/linux/sunrpc/bc_xprt.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/linux/sunrpc/bc_xprt.h') diff --git a/include/linux/sunrpc/bc_xprt.h b/include/linux/sunrpc/bc_xprt.h index 969c0a671dbf..2ca67b55e0fe 100644 --- a/include/linux/sunrpc/bc_xprt.h +++ b/include/linux/sunrpc/bc_xprt.h @@ -32,7 +32,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #include #ifdef CONFIG_SUNRPC_BACKCHANNEL -struct rpc_rqst *xprt_alloc_bc_request(struct rpc_xprt *xprt); +struct rpc_rqst *xprt_lookup_bc_request(struct rpc_xprt *xprt, __be32 xid); +void xprt_complete_bc_request(struct rpc_rqst *req, uint32_t copied); void xprt_free_bc_request(struct rpc_rqst *req); int xprt_setup_backchannel(struct rpc_xprt *, unsigned int min_reqs); void xprt_destroy_backchannel(struct rpc_xprt *, unsigned int max_reqs); -- cgit v1.2.3-59-g8ed1b