diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h index cb94ee4181d4..ca4d86a6c947 100644 --- a/include/linux/sunrpc/svc_rdma.h +++ b/include/linux/sunrpc/svc_rdma.h @@ -213,6 +213,8 @@ extern int rdma_read_chunk_frmr(struct svcxprt_rdma *, struct svc_rqst *, /* svc_rdma_sendto.c */ extern int svc_rdma_sendto(struct svc_rqst *); +extern struct rpcrdma_read_chunk * + svc_rdma_get_read_chunk(struct rpcrdma_msg *); /* svc_rdma_transport.c */ extern int svc_rdma_send(struct svcxprt_rdma *, struct ib_send_wr *); @@ -238,83 +240,4 @@ extern void svc_rdma_prep_reply_hdr(struct svc_rqst *); extern int svc_rdma_init(void); extern void svc_rdma_cleanup(void); -/* - * Returns the address of the first read chunk or if no read chunk is - * present - */ -static inline struct rpcrdma_read_chunk * -svc_rdma_get_read_chunk(struct rpcrdma_msg *rmsgp) -{ - struct rpcrdma_read_chunk *ch = - (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0]; - - if (ch->rc_discrim == 0) - return NULL; - - return ch; -} - -/* - * Returns the address of the first read write array element or if no - * write array list is present - */ -static inline struct rpcrdma_write_array * -svc_rdma_get_write_array(struct rpcrdma_msg *rmsgp) -{ - if (rmsgp->rm_body.rm_chunks[0] != 0 - || rmsgp->rm_body.rm_chunks[1] == 0) - return NULL; - - return (struct rpcrdma_write_array *)&rmsgp->rm_body.rm_chunks[1]; -} - -/* - * Returns the address of the first reply array element or if no - * reply array is present - */ -static inline struct rpcrdma_write_array * -svc_rdma_get_reply_array(struct rpcrdma_msg *rmsgp) -{ - struct rpcrdma_read_chunk *rch; - struct rpcrdma_write_array *wr_ary; - struct rpcrdma_write_array *rp_ary; - - /* XXX: Need to fix when reply list may occur with read-list and/or - * write list */ - if (rmsgp->rm_body.rm_chunks[0] != 0 || - rmsgp->rm_body.rm_chunks[1] != 0) - return NULL; - - rch = svc_rdma_get_read_chunk(rmsgp); - if (rch) { - while (rch->rc_discrim) - rch++; - - /* The reply list follows an empty write array located - * at 'rc_position' here. The reply array is at rc_target. - */ - rp_ary = (struct rpcrdma_write_array *)&rch->rc_target; - - goto found_it; - } - - wr_ary = svc_rdma_get_write_array(rmsgp); - if (wr_ary) { - rp_ary = (struct rpcrdma_write_array *) - &wr_ary-> - wc_array[ntohl(wr_ary->wc_nchunks)].wc_target.rs_length; - - goto found_it; - } - - /* No read list, no write list */ - rp_ary = (struct rpcrdma_write_array *) - &rmsgp->rm_body.rm_chunks[2]; - - found_it: - if (rp_ary->wc_discrim == 0) - return NULL; - - return rp_ary; -} #endif diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c index 95412abc95b0..1dfae8317065 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c +++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c @@ -136,6 +136,79 @@ static dma_addr_t dma_map_xdr(struct svcxprt_rdma *xprt, return dma_addr; } +/* Returns the address of the first read chunk or if no read chunk + * is present + */ +struct rpcrdma_read_chunk * +svc_rdma_get_read_chunk(struct rpcrdma_msg *rmsgp) +{ + struct rpcrdma_read_chunk *ch = + (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0]; + + if (ch->rc_discrim == xdr_zero) + return NULL; + return ch; +} + +/* Returns the address of the first read write array element or + * if no write array list is present + */ +static struct rpcrdma_write_array * +svc_rdma_get_write_array(struct rpcrdma_msg *rmsgp) +{ + if (rmsgp->rm_body.rm_chunks[0] != xdr_zero || + rmsgp->rm_body.rm_chunks[1] == xdr_zero) + return NULL; + return (struct rpcrdma_write_array *)&rmsgp->rm_body.rm_chunks[1]; +} + +/* Returns the address of the first reply array element or if no + * reply array is present + */ +static struct rpcrdma_write_array * +svc_rdma_get_reply_array(struct rpcrdma_msg *rmsgp) +{ + struct rpcrdma_read_chunk *rch; + struct rpcrdma_write_array *wr_ary; + struct rpcrdma_write_array *rp_ary; + + /* XXX: Need to fix when reply chunk may occur with read list + * and/or write list. + */ + if (rmsgp->rm_body.rm_chunks[0] != xdr_zero || + rmsgp->rm_body.rm_chunks[1] != xdr_zero) + return NULL; + + rch = svc_rdma_get_read_chunk(rmsgp); + if (rch) { + while (rch->rc_discrim != xdr_zero) + rch++; + + /* The reply chunk follows an empty write array located + * at 'rc_position' here. The reply array is at rc_target. + */ + rp_ary = (struct rpcrdma_write_array *)&rch->rc_target; + goto found_it; + } + + wr_ary = svc_rdma_get_write_array(rmsgp); + if (wr_ary) { + int chunk = be32_to_cpu(wr_ary->wc_nchunks); + + rp_ary = (struct rpcrdma_write_array *) + &wr_ary->wc_array[chunk].wc_target.rs_length; + goto found_it; + } + + /* No read list, no write list */ + rp_ary = (struct rpcrdma_write_array *)&rmsgp->rm_body.rm_chunks[2]; + + found_it: + if (rp_ary->wc_discrim == xdr_zero) + return NULL; + return rp_ary; +} + /* Assumptions: * - The specified write_len can be represented in sc_max_sge * PAGE_SIZE */