Function send_write() must stop creating sges when it reaches the device
max and return the amount sent in the RDMA Write to the caller.
Signed-off-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
---
net/sunrpc/xprtrdma/svc_rdma_sendto.c | 39 +++++++++++++--------------------
1 files changed, 15 insertions(+), 24 deletions(-)
diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
index 49fd21a..9f1b506 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
@@ -192,6 +192,8 @@ static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp,
xdr_sge_no++;
BUG_ON(xdr_sge_no > vec->count);
bc -= sge_bytes;
+ if (sge_no == xprt->sc_max_sge)
+ break;
}
/* Prepare WRITE WR */
@@ -209,7 +211,7 @@ static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp,
atomic_inc(&rdma_stat_write);
if (svc_rdma_send(xprt, &write_wr))
goto err;
- return 0;
+ return write_len - bc;
err:
svc_rdma_unmap_dma(ctxt);
svc_rdma_put_context(ctxt, 0);
@@ -225,7 +227,6 @@ static int send_write_chunks(struct svcxprt_rdma *xprt,
{
u32 xfer_len = rqstp->rq_res.page_len + rqstp->rq_res.tail[0].iov_len;
int write_len;
- int max_write;
u32 xdr_off;
int chunk_off;
int chunk_no;
@@ -239,8 +240,6 @@ static int send_write_chunks(struct svcxprt_rdma *xprt,
res_ary = (struct rpcrdma_write_array *)
&rdma_resp->rm_body.rm_chunks[1];
- max_write = xprt->sc_max_sge * PAGE_SIZE;
-
/* Write chunks start at the pagelist */
for (xdr_off = rqstp->rq_res.head[0].iov_len, chunk_no = 0;
xfer_len && chunk_no < arg_ary->wc_nchunks;
@@ -260,23 +259,21 @@ static int send_write_chunks(struct svcxprt_rdma *xprt,
write_len);
chunk_off = 0;
while (write_len) {
- int this_write;
- this_write = min(write_len, max_write);
ret = send_write(xprt, rqstp,
ntohl(arg_ch->rs_handle),
rs_offset + chunk_off,
xdr_off,
- this_write,
+ write_len,
vec);
- if (ret) {
+ if (ret <= 0) {
dprintk("svcrdma: RDMA_WRITE failed, ret=%d\n",
ret);
return -EIO;
}
- chunk_off += this_write;
- xdr_off += this_write;
- xfer_len -= this_write;
- write_len -= this_write;
+ chunk_off += ret;
+ xdr_off += ret;
+ xfer_len -= ret;
+ write_len -= ret;
}
}
/* Update the req with the number of chunks actually used */
@@ -293,7 +290,6 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt,
{
u32 xfer_len = rqstp->rq_res.len;
int write_len;
- int max_write;
u32 xdr_off;
int chunk_no;
int chunk_off;
@@ -311,8 +307,6 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt,
res_ary = (struct rpcrdma_write_array *)
&rdma_resp->rm_body.rm_chunks[2];
- max_write = xprt->sc_max_sge * PAGE_SIZE;
-
/* xdr offset starts at RPC message */
nchunks = ntohl(arg_ary->wc_nchunks);
for (xdr_off = 0, chunk_no = 0;
@@ -330,24 +324,21 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt,
write_len);
chunk_off = 0;
while (write_len) {
- int this_write;
-
- this_write = min(write_len, max_write);
ret = send_write(xprt, rqstp,
ntohl(ch->rs_handle),
rs_offset + chunk_off,
xdr_off,
- this_write,
+ write_len,
vec);
- if (ret) {
+ if (ret <= 0) {
dprintk("svcrdma: RDMA_WRITE failed, ret=%d\n",
ret);
return -EIO;
}
- chunk_off += this_write;
- xdr_off += this_write;
- xfer_len -= this_write;
- write_len -= this_write;
+ chunk_off += ret;
+ xdr_off += ret;
+ xfer_len -= ret;
+ write_len -= ret;
}
}
/* Update the req with the number of chunks actually used */
--
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