}
if (xdrbuf->tail[0].iov_len) {
+ /* the rpcrdma protocol allows us to omit any trailing
+ * xdr pad bytes, saving the server an RDMA operation. */
+ if (xdrbuf->tail[0].iov_len < 4 && xprt_rdma_pad_optimize)
+ return n;
if (n == nsegs)
return 0;
seg[n].mr_page = NULL;
if (hdrlen == 0)
return -1;
- dprintk("RPC: %s: %s: hdrlen %zd rpclen %zd padlen %zd\n"
- " headerp 0x%p base 0x%p lkey 0x%x\n",
+ dprintk("RPC: %s: %s: hdrlen %zd rpclen %zd padlen %zd"
+ " headerp 0x%p base 0x%p lkey 0x%x\n",
__func__, transfertypes[wtype], hdrlen, rpclen, padlen,
headerp, base, req->rl_iov.lkey);
* Scatter inline received data back into provided iov's.
*/
static void
-rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len)
+rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len, int pad)
{
int i, npages, curlen, olen;
char *destp;
} else
rqst->rq_rcv_buf.tail[0].iov_len = 0;
+ if (pad) {
+ /* implicit padding on terminal chunk */
+ unsigned char *p = rqst->rq_rcv_buf.tail[0].iov_base;
+ while (pad--)
+ p[rqst->rq_rcv_buf.tail[0].iov_len++] = 0;
+ }
+
if (copy_len)
dprintk("RPC: %s: %d bytes in"
" %d extra segments (%d lost)\n",
struct rpc_xprt *xprt = ep->rep_xprt;
spin_lock_bh(&xprt->transport_lock);
+ if (++xprt->connect_cookie == 0) /* maintain a reserved value */
+ ++xprt->connect_cookie;
if (ep->rep_connected > 0) {
if (!xprt_test_and_set_connected(xprt))
xprt_wake_pending_tasks(xprt, 0);
} else {
if (xprt_test_and_clear_connected(xprt))
- xprt_wake_pending_tasks(xprt, ep->rep_connected);
+ xprt_wake_pending_tasks(xprt, -ENOTCONN);
}
spin_unlock_bh(&xprt->transport_lock);
}
((unsigned char *)iptr - (unsigned char *)headerp);
status = rep->rr_len + rdmalen;
r_xprt->rx_stats.total_rdma_reply += rdmalen;
+ /* special case - last chunk may omit padding */
+ if (rdmalen &= 3) {
+ rdmalen = 4 - rdmalen;
+ status += rdmalen;
+ }
} else {
/* else ordinary inline */
+ rdmalen = 0;
iptr = (__be32 *)((unsigned char *)headerp + 28);
rep->rr_len -= 28; /*sizeof *headerp;*/
status = rep->rr_len;
}
/* Fix up the rpc results for upper layer */
- rpcrdma_inline_fixup(rqst, (char *)iptr, rep->rr_len);
+ rpcrdma_inline_fixup(rqst, (char *)iptr, rep->rr_len, rdmalen);
break;
case htonl(RDMA_NOMSG):