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-rw-r--r--net/sunrpc/backchannel_rqst.c4
-rw-r--r--net/sunrpc/clnt.c12
-rw-r--r--net/sunrpc/svcsock.c6
-rw-r--r--net/sunrpc/xprt.c57
-rw-r--r--net/sunrpc/xprtrdma/backchannel.c71
-rw-r--r--net/sunrpc/xprtrdma/fmr_ops.c10
-rw-r--r--net/sunrpc/xprtrdma/frwr_ops.c12
-rw-r--r--net/sunrpc/xprtrdma/rpc_rdma.c902
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_backchannel.c9
-rw-r--r--net/sunrpc/xprtrdma/transport.c8
-rw-r--r--net/sunrpc/xprtrdma/verbs.c22
-rw-r--r--net/sunrpc/xprtrdma/xprt_rdma.h63
-rw-r--r--net/sunrpc/xprtsock.c90
13 files changed, 712 insertions, 554 deletions
diff --git a/net/sunrpc/backchannel_rqst.c b/net/sunrpc/backchannel_rqst.c
index ac701c28f44f..c2c68a15b59d 100644
--- a/net/sunrpc/backchannel_rqst.c
+++ b/net/sunrpc/backchannel_rqst.c
@@ -171,10 +171,10 @@ int xprt_setup_bc(struct rpc_xprt *xprt, unsigned int min_reqs)
/*
* Add the temporary list to the backchannel preallocation list
*/
- spin_lock_bh(&xprt->bc_pa_lock);
+ spin_lock(&xprt->bc_pa_lock);
list_splice(&tmp_list, &xprt->bc_pa_list);
xprt_inc_alloc_count(xprt, min_reqs);
- spin_unlock_bh(&xprt->bc_pa_lock);
+ spin_unlock(&xprt->bc_pa_lock);
dprintk("RPC: setup backchannel transport done\n");
return 0;
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 2e49d1f892b7..2ad827db2704 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1903,6 +1903,14 @@ call_connect_status(struct rpc_task *task)
task->tk_status = 0;
switch (status) {
case -ECONNREFUSED:
+ /* A positive refusal suggests a rebind is needed. */
+ if (RPC_IS_SOFTCONN(task))
+ break;
+ if (clnt->cl_autobind) {
+ rpc_force_rebind(clnt);
+ task->tk_action = call_bind;
+ return;
+ }
case -ECONNRESET:
case -ECONNABORTED:
case -ENETUNREACH:
@@ -2139,10 +2147,6 @@ call_status(struct rpc_task *task)
rpc_delay(task, 3*HZ);
case -ETIMEDOUT:
task->tk_action = call_timeout;
- if (!(task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT)
- && task->tk_client->cl_discrtry)
- xprt_conditional_disconnect(req->rq_xprt,
- req->rq_connect_cookie);
break;
case -ECONNREFUSED:
case -ECONNRESET:
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 399fab5d1936..ff8e06cd067e 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1013,7 +1013,7 @@ static int receive_cb_reply(struct svc_sock *svsk, struct svc_rqst *rqstp)
if (!bc_xprt)
return -EAGAIN;
- spin_lock_bh(&bc_xprt->transport_lock);
+ spin_lock(&bc_xprt->recv_lock);
req = xprt_lookup_rqst(bc_xprt, xid);
if (!req)
goto unlock_notfound;
@@ -1031,7 +1031,7 @@ static int receive_cb_reply(struct svc_sock *svsk, struct svc_rqst *rqstp)
memcpy(dst->iov_base, src->iov_base, src->iov_len);
xprt_complete_rqst(req->rq_task, rqstp->rq_arg.len);
rqstp->rq_arg.len = 0;
- spin_unlock_bh(&bc_xprt->transport_lock);
+ spin_unlock(&bc_xprt->recv_lock);
return 0;
unlock_notfound:
printk(KERN_NOTICE
@@ -1040,7 +1040,7 @@ unlock_notfound:
__func__, ntohl(calldir),
bc_xprt, ntohl(xid));
unlock_eagain:
- spin_unlock_bh(&bc_xprt->transport_lock);
+ spin_unlock(&bc_xprt->recv_lock);
return -EAGAIN;
}
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 4654a9934269..e741ec2b4d8e 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -844,6 +844,50 @@ struct rpc_rqst *xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 xid)
}
EXPORT_SYMBOL_GPL(xprt_lookup_rqst);
+/**
+ * xprt_pin_rqst - Pin a request on the transport receive list
+ * @req: Request to pin
+ *
+ * Caller must ensure this is atomic with the call to xprt_lookup_rqst()
+ * so should be holding the xprt transport lock.
+ */
+void xprt_pin_rqst(struct rpc_rqst *req)
+{
+ set_bit(RPC_TASK_MSG_RECV, &req->rq_task->tk_runstate);
+}
+EXPORT_SYMBOL_GPL(xprt_pin_rqst);
+
+/**
+ * xprt_unpin_rqst - Unpin a request on the transport receive list
+ * @req: Request to pin
+ *
+ * Caller should be holding the xprt transport lock.
+ */
+void xprt_unpin_rqst(struct rpc_rqst *req)
+{
+ struct rpc_task *task = req->rq_task;
+
+ clear_bit(RPC_TASK_MSG_RECV, &task->tk_runstate);
+ if (test_bit(RPC_TASK_MSG_RECV_WAIT, &task->tk_runstate))
+ wake_up_bit(&task->tk_runstate, RPC_TASK_MSG_RECV);
+}
+EXPORT_SYMBOL_GPL(xprt_unpin_rqst);
+
+static void xprt_wait_on_pinned_rqst(struct rpc_rqst *req)
+__must_hold(&req->rq_xprt->recv_lock)
+{
+ struct rpc_task *task = req->rq_task;
+
+ if (task && test_bit(RPC_TASK_MSG_RECV, &task->tk_runstate)) {
+ spin_unlock(&req->rq_xprt->recv_lock);
+ set_bit(RPC_TASK_MSG_RECV_WAIT, &task->tk_runstate);
+ wait_on_bit(&task->tk_runstate, RPC_TASK_MSG_RECV,
+ TASK_UNINTERRUPTIBLE);
+ clear_bit(RPC_TASK_MSG_RECV_WAIT, &task->tk_runstate);
+ spin_lock(&req->rq_xprt->recv_lock);
+ }
+}
+
static void xprt_update_rtt(struct rpc_task *task)
{
struct rpc_rqst *req = task->tk_rqstp;
@@ -966,13 +1010,13 @@ void xprt_transmit(struct rpc_task *task)
/*
* Add to the list only if we're expecting a reply
*/
- spin_lock_bh(&xprt->transport_lock);
/* Update the softirq receive buffer */
memcpy(&req->rq_private_buf, &req->rq_rcv_buf,
sizeof(req->rq_private_buf));
/* Add request to the receive list */
+ spin_lock(&xprt->recv_lock);
list_add_tail(&req->rq_list, &xprt->recv);
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
xprt_reset_majortimeo(req);
/* Turn off autodisconnect */
del_singleshot_timer_sync(&xprt->timer);
@@ -1287,12 +1331,16 @@ void xprt_release(struct rpc_task *task)
task->tk_ops->rpc_count_stats(task, task->tk_calldata);
else if (task->tk_client)
rpc_count_iostats(task, task->tk_client->cl_metrics);
+ spin_lock(&xprt->recv_lock);
+ if (!list_empty(&req->rq_list)) {
+ list_del(&req->rq_list);
+ xprt_wait_on_pinned_rqst(req);
+ }
+ spin_unlock(&xprt->recv_lock);
spin_lock_bh(&xprt->transport_lock);
xprt->ops->release_xprt(xprt, task);
if (xprt->ops->release_request)
xprt->ops->release_request(task);
- if (!list_empty(&req->rq_list))
- list_del(&req->rq_list);
xprt->last_used = jiffies;
xprt_schedule_autodisconnect(xprt);
spin_unlock_bh(&xprt->transport_lock);
@@ -1318,6 +1366,7 @@ static void xprt_init(struct rpc_xprt *xprt, struct net *net)
spin_lock_init(&xprt->transport_lock);
spin_lock_init(&xprt->reserve_lock);
+ spin_lock_init(&xprt->recv_lock);
INIT_LIST_HEAD(&xprt->free);
INIT_LIST_HEAD(&xprt->recv);
diff --git a/net/sunrpc/xprtrdma/backchannel.c b/net/sunrpc/xprtrdma/backchannel.c
index 03f6b5840764..d31d0ac5ada9 100644
--- a/net/sunrpc/xprtrdma/backchannel.c
+++ b/net/sunrpc/xprtrdma/backchannel.c
@@ -49,6 +49,7 @@ static int rpcrdma_bc_setup_rqst(struct rpcrdma_xprt *r_xprt,
if (IS_ERR(rb))
goto out_fail;
req->rl_rdmabuf = rb;
+ xdr_buf_init(&req->rl_hdrbuf, rb->rg_base, rdmab_length(rb));
size = r_xprt->rx_data.inline_rsize;
rb = rpcrdma_alloc_regbuf(size, DMA_TO_DEVICE, GFP_KERNEL);
@@ -202,20 +203,24 @@ size_t xprt_rdma_bc_maxpayload(struct rpc_xprt *xprt)
*/
int rpcrdma_bc_marshal_reply(struct rpc_rqst *rqst)
{
- struct rpc_xprt *xprt = rqst->rq_xprt;
- struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
+ struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
- struct rpcrdma_msg *headerp;
-
- headerp = rdmab_to_msg(req->rl_rdmabuf);
- headerp->rm_xid = rqst->rq_xid;
- headerp->rm_vers = rpcrdma_version;
- headerp->rm_credit =
- cpu_to_be32(r_xprt->rx_buf.rb_bc_srv_max_requests);
- headerp->rm_type = rdma_msg;
- headerp->rm_body.rm_chunks[0] = xdr_zero;
- headerp->rm_body.rm_chunks[1] = xdr_zero;
- headerp->rm_body.rm_chunks[2] = xdr_zero;
+ __be32 *p;
+
+ rpcrdma_set_xdrlen(&req->rl_hdrbuf, 0);
+ xdr_init_encode(&req->rl_stream, &req->rl_hdrbuf,
+ req->rl_rdmabuf->rg_base);
+
+ p = xdr_reserve_space(&req->rl_stream, 28);
+ if (unlikely(!p))
+ return -EIO;
+ *p++ = rqst->rq_xid;
+ *p++ = rpcrdma_version;
+ *p++ = cpu_to_be32(r_xprt->rx_buf.rb_bc_srv_max_requests);
+ *p++ = rdma_msg;
+ *p++ = xdr_zero;
+ *p++ = xdr_zero;
+ *p = xdr_zero;
if (!rpcrdma_prepare_send_sges(&r_xprt->rx_ia, req, RPCRDMA_HDRLEN_MIN,
&rqst->rq_snd_buf, rpcrdma_noch))
@@ -271,9 +276,6 @@ void xprt_rdma_bc_free_rqst(struct rpc_rqst *rqst)
* @xprt: transport receiving the call
* @rep: receive buffer containing the call
*
- * Called in the RPC reply handler, which runs in a tasklet.
- * Be quick about it.
- *
* Operational assumptions:
* o Backchannel credits are ignored, just as the NFS server
* forechannel currently does
@@ -284,7 +286,6 @@ void rpcrdma_bc_receive_call(struct rpcrdma_xprt *r_xprt,
struct rpcrdma_rep *rep)
{
struct rpc_xprt *xprt = &r_xprt->rx_xprt;
- struct rpcrdma_msg *headerp;
struct svc_serv *bc_serv;
struct rpcrdma_req *req;
struct rpc_rqst *rqst;
@@ -292,24 +293,15 @@ void rpcrdma_bc_receive_call(struct rpcrdma_xprt *r_xprt,
size_t size;
__be32 *p;
- headerp = rdmab_to_msg(rep->rr_rdmabuf);
+ p = xdr_inline_decode(&rep->rr_stream, 0);
+ size = xdr_stream_remaining(&rep->rr_stream);
+
#ifdef RPCRDMA_BACKCHANNEL_DEBUG
pr_info("RPC: %s: callback XID %08x, length=%u\n",
- __func__, be32_to_cpu(headerp->rm_xid), rep->rr_len);
- pr_info("RPC: %s: %*ph\n", __func__, rep->rr_len, headerp);
+ __func__, be32_to_cpup(p), size);
+ pr_info("RPC: %s: %*ph\n", __func__, size, p);
#endif
- /* Sanity check:
- * Need at least enough bytes for RPC/RDMA header, as code
- * here references the header fields by array offset. Also,
- * backward calls are always inline, so ensure there
- * are some bytes beyond the RPC/RDMA header.
- */
- if (rep->rr_len < RPCRDMA_HDRLEN_MIN + 24)
- goto out_short;
- p = (__be32 *)((unsigned char *)headerp + RPCRDMA_HDRLEN_MIN);
- size = rep->rr_len - RPCRDMA_HDRLEN_MIN;
-
/* Grab a free bc rqst */
spin_lock(&xprt->bc_pa_lock);
if (list_empty(&xprt->bc_pa_list)) {
@@ -325,7 +317,7 @@ void rpcrdma_bc_receive_call(struct rpcrdma_xprt *r_xprt,
/* Prepare rqst */
rqst->rq_reply_bytes_recvd = 0;
rqst->rq_bytes_sent = 0;
- rqst->rq_xid = headerp->rm_xid;
+ rqst->rq_xid = *p;
rqst->rq_private_buf.len = size;
set_bit(RPC_BC_PA_IN_USE, &rqst->rq_bc_pa_state);
@@ -337,9 +329,9 @@ void rpcrdma_bc_receive_call(struct rpcrdma_xprt *r_xprt,
buf->len = size;
/* The receive buffer has to be hooked to the rpcrdma_req
- * so that it can be reposted after the server is done
- * parsing it but just before sending the backward
- * direction reply.
+ * so that it is not released while the req is pointing
+ * to its buffer, and so that it can be reposted after
+ * the Upper Layer is done decoding it.
*/
req = rpcr_to_rdmar(rqst);
dprintk("RPC: %s: attaching rep %p to req %p\n",
@@ -367,13 +359,4 @@ out_overflow:
* when the connection is re-established.
*/
return;
-
-out_short:
- pr_warn("RPC/RDMA short backward direction call\n");
-
- if (rpcrdma_ep_post_recv(&r_xprt->rx_ia, rep))
- xprt_disconnect_done(xprt);
- else
- pr_warn("RPC: %s: reposting rep %p\n",
- __func__, rep);
}
diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c
index d3f84bb1d443..6c7151341194 100644
--- a/net/sunrpc/xprtrdma/fmr_ops.c
+++ b/net/sunrpc/xprtrdma/fmr_ops.c
@@ -177,7 +177,7 @@ fmr_op_maxpages(struct rpcrdma_xprt *r_xprt)
/* Use the ib_map_phys_fmr() verb to register a memory region
* for remote access via RDMA READ or RDMA WRITE.
*/
-static int
+static struct rpcrdma_mr_seg *
fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
int nsegs, bool writing, struct rpcrdma_mw **out)
{
@@ -188,7 +188,7 @@ fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
mw = rpcrdma_get_mw(r_xprt);
if (!mw)
- return -ENOBUFS;
+ return ERR_PTR(-ENOBUFS);
pageoff = offset_in_page(seg1->mr_offset);
seg1->mr_offset -= pageoff; /* start of page */
@@ -232,13 +232,13 @@ fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
mw->mw_offset = dma_pages[0] + pageoff;
*out = mw;
- return mw->mw_nents;
+ return seg;
out_dmamap_err:
pr_err("rpcrdma: failed to DMA map sg %p sg_nents %d\n",
mw->mw_sg, i);
rpcrdma_put_mw(r_xprt, mw);
- return -EIO;
+ return ERR_PTR(-EIO);
out_maperr:
pr_err("rpcrdma: ib_map_phys_fmr %u@0x%llx+%i (%d) status %i\n",
@@ -247,7 +247,7 @@ out_maperr:
ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
mw->mw_sg, mw->mw_nents, mw->mw_dir);
rpcrdma_put_mw(r_xprt, mw);
- return -EIO;
+ return ERR_PTR(-EIO);
}
/* Invalidate all memory regions that were registered for "req".
diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c
index 6aea36a38bfd..5a936a6a31a3 100644
--- a/net/sunrpc/xprtrdma/frwr_ops.c
+++ b/net/sunrpc/xprtrdma/frwr_ops.c
@@ -344,7 +344,7 @@ frwr_wc_localinv_wake(struct ib_cq *cq, struct ib_wc *wc)
/* Post a REG_MR Work Request to register a memory region
* for remote access via RDMA READ or RDMA WRITE.
*/
-static int
+static struct rpcrdma_mr_seg *
frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
int nsegs, bool writing, struct rpcrdma_mw **out)
{
@@ -364,7 +364,7 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
rpcrdma_defer_mr_recovery(mw);
mw = rpcrdma_get_mw(r_xprt);
if (!mw)
- return -ENOBUFS;
+ return ERR_PTR(-ENOBUFS);
} while (mw->frmr.fr_state != FRMR_IS_INVALID);
frmr = &mw->frmr;
frmr->fr_state = FRMR_IS_VALID;
@@ -429,25 +429,25 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
mw->mw_offset = mr->iova;
*out = mw;
- return mw->mw_nents;
+ return seg;
out_dmamap_err:
pr_err("rpcrdma: failed to DMA map sg %p sg_nents %d\n",
mw->mw_sg, i);
frmr->fr_state = FRMR_IS_INVALID;
rpcrdma_put_mw(r_xprt, mw);
- return -EIO;
+ return ERR_PTR(-EIO);
out_mapmr_err:
pr_err("rpcrdma: failed to map mr %p (%d/%d)\n",
frmr->fr_mr, n, mw->mw_nents);
rpcrdma_defer_mr_recovery(mw);
- return -EIO;
+ return ERR_PTR(-EIO);
out_senderr:
pr_err("rpcrdma: FRMR registration ib_post_send returned %i\n", rc);
rpcrdma_defer_mr_recovery(mw);
- return -ENOTCONN;
+ return ERR_PTR(-ENOTCONN);
}
/* Invalidate all memory regions that were registered for "req".
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index ca4d6e4528f3..f1889f4d4803 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -169,40 +169,41 @@ static bool rpcrdma_results_inline(struct rpcrdma_xprt *r_xprt,
return rqst->rq_rcv_buf.buflen <= ia->ri_max_inline_read;
}
-/* Split "vec" on page boundaries into segments. FMR registers pages,
- * not a byte range. Other modes coalesce these segments into a single
- * MR when they can.
+/* Split @vec on page boundaries into SGEs. FMR registers pages, not
+ * a byte range. Other modes coalesce these SGEs into a single MR
+ * when they can.
+ *
+ * Returns pointer to next available SGE, and bumps the total number
+ * of SGEs consumed.
*/
-static int
-rpcrdma_convert_kvec(struct kvec *vec, struct rpcrdma_mr_seg *seg, int n)
+static struct rpcrdma_mr_seg *
+rpcrdma_convert_kvec(struct kvec *vec, struct rpcrdma_mr_seg *seg,
+ unsigned int *n)
{
- size_t page_offset;
- u32 remaining;
+ u32 remaining, page_offset;
char *base;
base = vec->iov_base;
page_offset = offset_in_page(base);
remaining = vec->iov_len;
- while (remaining && n < RPCRDMA_MAX_SEGS) {
- seg[n].mr_page = NULL;
- seg[n].mr_offset = base;
- seg[n].mr_len = min_t(u32, PAGE_SIZE - page_offset, remaining);
- remaining -= seg[n].mr_len;
- base += seg[n].mr_len;
- ++n;
+ while (remaining) {
+ seg->mr_page = NULL;
+ seg->mr_offset = base;
+ seg->mr_len = min_t(u32, PAGE_SIZE - page_offset, remaining);
+ remaining -= seg->mr_len;
+ base += seg->mr_len;
+ ++seg;
+ ++(*n);
page_offset = 0;
}
- return n;
+ return seg;
}
-/*
- * Chunk assembly from upper layer xdr_buf.
- *
- * Prepare the passed-in xdr_buf into representation as RPC/RDMA chunk
- * elements. Segments are then coalesced when registered, if possible
- * within the selected memreg mode.
+/* Convert @xdrbuf into SGEs no larger than a page each. As they
+ * are registered, these SGEs are then coalesced into RDMA segments
+ * when the selected memreg mode supports it.
*
- * Returns positive number of segments converted, or a negative errno.
+ * Returns positive number of SGEs consumed, or a negative errno.
*/
static int
@@ -210,47 +211,41 @@ rpcrdma_convert_iovs(struct rpcrdma_xprt *r_xprt, struct xdr_buf *xdrbuf,
unsigned int pos, enum rpcrdma_chunktype type,
struct rpcrdma_mr_seg *seg)
{
- int len, n, p, page_base;
+ unsigned long page_base;
+ unsigned int len, n;
struct page **ppages;
n = 0;
- if (pos == 0) {
- n = rpcrdma_convert_kvec(&xdrbuf->head[0], seg, n);
- if (n == RPCRDMA_MAX_SEGS)
- goto out_overflow;
- }
+ if (pos == 0)
+ seg = rpcrdma_convert_kvec(&xdrbuf->head[0], seg, &n);
len = xdrbuf->page_len;
ppages = xdrbuf->pages + (xdrbuf->page_base >> PAGE_SHIFT);
page_base = offset_in_page(xdrbuf->page_base);
- p = 0;
- while (len && n < RPCRDMA_MAX_SEGS) {
- if (!ppages[p]) {
- /* alloc the pagelist for receiving buffer */
- ppages[p] = alloc_page(GFP_ATOMIC);
- if (!ppages[p])
+ while (len) {
+ if (unlikely(!*ppages)) {
+ /* XXX: Certain upper layer operations do
+ * not provide receive buffer pages.
+ */
+ *ppages = alloc_page(GFP_ATOMIC);
+ if (!*ppages)
return -EAGAIN;
}
- seg[n].mr_page = ppages[p];
- seg[n].mr_offset = (void *)(unsigned long) page_base;
- seg[n].mr_len = min_t(u32, PAGE_SIZE - page_base, len);
- if (seg[n].mr_len > PAGE_SIZE)
- goto out_overflow;
- len -= seg[n].mr_len;
+ seg->mr_page = *ppages;
+ seg->mr_offset = (char *)page_base;
+ seg->mr_len = min_t(u32, PAGE_SIZE - page_base, len);
+ len -= seg->mr_len;
+ ++ppages;
+ ++seg;
++n;
- ++p;
- page_base = 0; /* page offset only applies to first page */
+ page_base = 0;
}
- /* Message overflows the seg array */
- if (len && n == RPCRDMA_MAX_SEGS)
- goto out_overflow;
-
/* When encoding a Read chunk, the tail iovec contains an
* XDR pad and may be omitted.
*/
if (type == rpcrdma_readch && r_xprt->rx_ia.ri_implicit_roundup)
- return n;
+ goto out;
/* When encoding a Write chunk, some servers need to see an
* extra segment for non-XDR-aligned Write chunks. The upper
@@ -258,30 +253,81 @@ rpcrdma_convert_iovs(struct rpcrdma_xprt *r_xprt, struct xdr_buf *xdrbuf,
* for this purpose.
*/
if (type == rpcrdma_writech && r_xprt->rx_ia.ri_implicit_roundup)
- return n;
+ goto out;
- if (xdrbuf->tail[0].iov_len) {
- n = rpcrdma_convert_kvec(&xdrbuf->tail[0], seg, n);
- if (n == RPCRDMA_MAX_SEGS)
- goto out_overflow;
- }
+ if (xdrbuf->tail[0].iov_len)
+ seg = rpcrdma_convert_kvec(&xdrbuf->tail[0], seg, &n);
+out:
+ if (unlikely(n > RPCRDMA_MAX_SEGS))
+ return -EIO;
return n;
+}
-out_overflow:
- pr_err("rpcrdma: segment array overflow\n");
- return -EIO;
+static inline int
+encode_item_present(struct xdr_stream *xdr)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, sizeof(*p));
+ if (unlikely(!p))
+ return -EMSGSIZE;
+
+ *p = xdr_one;
+ return 0;
}
-static inline __be32 *
+static inline int
+encode_item_not_present(struct xdr_stream *xdr)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, sizeof(*p));
+ if (unlikely(!p))
+ return -EMSGSIZE;
+
+ *p = xdr_zero;
+ return 0;
+}
+
+static void
xdr_encode_rdma_segment(__be32 *iptr, struct rpcrdma_mw *mw)
{
*iptr++ = cpu_to_be32(mw->mw_handle);
*iptr++ = cpu_to_be32(mw->mw_length);
- return xdr_encode_hyper(iptr, mw->mw_offset);
+ xdr_encode_hyper(iptr, mw->mw_offset);
}
-/* XDR-encode the Read list. Supports encoding a list of read
+static int
+encode_rdma_segment(struct xdr_stream *xdr, struct rpcrdma_mw *mw)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, 4 * sizeof(*p));
+ if (unlikely(!p))
+ return -EMSGSIZE;
+
+ xdr_encode_rdma_segment(p, mw);
+ return 0;
+}
+
+static int
+encode_read_segment(struct xdr_stream *xdr, struct rpcrdma_mw *mw,
+ u32 position)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, 6 * sizeof(*p));
+ if (unlikely(!p))
+ return -EMSGSIZE;
+
+ *p++ = xdr_one; /* Item present */
+ *p++ = cpu_to_be32(position);
+ xdr_encode_rdma_segment(p, mw);
+ return 0;
+}
+
+/* Register and XDR encode the Read list. Supports encoding a list of read
* segments that belong to a single read chunk.
*
* Encoding key for single-list chunks (HLOO = Handle32 Length32 Offset64):
@@ -290,23 +336,20 @@ xdr_encode_rdma_segment(__be32 *iptr, struct rpcrdma_mw *mw)
* N elements, position P (same P for all chunks of same arg!):
* 1 - PHLOO - 1 - PHLOO - ... - 1 - PHLOO - 0
*
- * Returns a pointer to the XDR word in the RDMA header following
- * the end of the Read list, or an error pointer.
+ * Returns zero on success, or a negative errno if a failure occurred.
+ * @xdr is advanced to the next position in the stream.
+ *
+ * Only a single @pos value is currently supported.
*/
-static __be32 *
-rpcrdma_encode_read_list(struct rpcrdma_xprt *r_xprt,
- struct rpcrdma_req *req, struct rpc_rqst *rqst,
- __be32 *iptr, enum rpcrdma_chunktype rtype)
+static noinline int
+rpcrdma_encode_read_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
+ struct rpc_rqst *rqst, enum rpcrdma_chunktype rtype)
{
+ struct xdr_stream *xdr = &req->rl_stream;
struct rpcrdma_mr_seg *seg;
struct rpcrdma_mw *mw;
unsigned int pos;
- int n, nsegs;
-
- if (rtype == rpcrdma_noch) {
- *iptr++ = xdr_zero; /* item not present */
- return iptr;
- }
+ int nsegs;
pos = rqst->rq_snd_buf.head[0].iov_len;
if (rtype == rpcrdma_areadch)
@@ -315,40 +358,33 @@ rpcrdma_encode_read_list(struct rpcrdma_xprt *r_xprt,
nsegs = rpcrdma_convert_iovs(r_xprt, &rqst->rq_snd_buf, pos,
rtype, seg);
if (nsegs < 0)
- return ERR_PTR(nsegs);
+ return nsegs;
do {
- n = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs,
- false, &mw);
- if (n < 0)
- return ERR_PTR(n);
+ seg = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs,
+ false, &mw);
+ if (IS_ERR(seg))
+ return PTR_ERR(seg);
rpcrdma_push_mw(mw, &req->rl_registered);
- *iptr++ = xdr_one; /* item present */
-
- /* All read segments in this chunk
- * have the same "position".
- */
- *iptr++ = cpu_to_be32(pos);
- iptr = xdr_encode_rdma_segment(iptr, mw);
+ if (encode_read_segment(xdr, mw, pos) < 0)
+ return -EMSGSIZE;
dprintk("RPC: %5u %s: pos %u %u@0x%016llx:0x%08x (%s)\n",
rqst->rq_task->tk_pid, __func__, pos,
mw->mw_length, (unsigned long long)mw->mw_offset,
- mw->mw_handle, n < nsegs ? "more" : "last");
+ mw->mw_handle, mw->mw_nents < nsegs ? "more" : "last");
r_xprt->rx_stats.read_chunk_count++;
- seg += n;
- nsegs -= n;
+ nsegs -= mw->mw_nents;
} while (nsegs);
- /* Finish Read list */
- *iptr++ = xdr_zero; /* Next item not present */
- return iptr;
+ return 0;
}
-/* XDR-encode the Write list. Supports encoding a list containing
- * one array of plain segments that belong to a single write chunk.
+/* Register and XDR encode the Write list. Supports encoding a list
+ * containing one array of plain segments that belong to a single
+ * write chunk.
*
* Encoding key for single-list chunks (HLOO = Handle32 Length32 Offset64):
*
@@ -356,66 +392,65 @@ rpcrdma_encode_read_list(struct rpcrdma_xprt *r_xprt,
* N elements:
* 1 - N - HLOO - HLOO - ... - HLOO - 0
*
- * Returns a pointer to the XDR word in the RDMA header following
- * the end of the Write list, or an error pointer.
+ * Returns zero on success, or a negative errno if a failure occurred.
+ * @xdr is advanced to the next position in the stream.
+ *
+ * Only a single Write chunk is currently supported.
*/
-static __be32 *
+static noinline int
rpcrdma_encode_write_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
- struct rpc_rqst *rqst, __be32 *iptr,
- enum rpcrdma_chunktype wtype)
+ struct rpc_rqst *rqst, enum rpcrdma_chunktype wtype)
{
+ struct xdr_stream *xdr = &req->rl_stream;
struct rpcrdma_mr_seg *seg;
struct rpcrdma_mw *mw;
- int n, nsegs, nchunks;
+ int nsegs, nchunks;
__be32 *segcount;
- if (wtype != rpcrdma_writech) {
- *iptr++ = xdr_zero; /* no Write list present */
- return iptr;
- }
-
seg = req->rl_segments;
nsegs = rpcrdma_convert_iovs(r_xprt, &rqst->rq_rcv_buf,
rqst->rq_rcv_buf.head[0].iov_len,
wtype, seg);
if (nsegs < 0)
- return ERR_PTR(nsegs);
+ return nsegs;
- *iptr++ = xdr_one; /* Write list present */
- segcount = iptr++; /* save location of segment count */
+ if (encode_item_present(xdr) < 0)
+ return -EMSGSIZE;
+ segcount = xdr_reserve_space(xdr, sizeof(*segcount));
+ if (unlikely(!segcount))
+ return -EMSGSIZE;
+ /* Actual value encoded below */
nchunks = 0;
do {
- n = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs,
- true, &mw);
- if (n < 0)
- return ERR_PTR(n);
+ seg = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs,
+ true, &mw);
+ if (IS_ERR(seg))
+ return PTR_ERR(seg);
rpcrdma_push_mw(mw, &req->rl_registered);
- iptr = xdr_encode_rdma_segment(iptr, mw);
+ if (encode_rdma_segment(xdr, mw) < 0)
+ return -EMSGSIZE;
dprintk("RPC: %5u %s: %u@0x016%llx:0x%08x (%s)\n",
rqst->rq_task->tk_pid, __func__,
mw->mw_length, (unsigned long long)mw->mw_offset,
- mw->mw_handle, n < nsegs ? "more" : "last");
+ mw->mw_handle, mw->mw_nents < nsegs ? "more" : "last");
r_xprt->rx_stats.write_chunk_count++;
r_xprt->rx_stats.total_rdma_request += seg->mr_len;
nchunks++;
- seg += n;
- nsegs -= n;
+ nsegs -= mw->mw_nents;
} while (nsegs);
/* Update count of segments in this Write chunk */
*segcount = cpu_to_be32(nchunks);
- /* Finish Write list */
- *iptr++ = xdr_zero; /* Next item not present */
- return iptr;
+ return 0;
}
-/* XDR-encode the Reply chunk. Supports encoding an array of plain
- * segments that belong to a single write (reply) chunk.
+/* Register and XDR encode the Reply chunk. Supports encoding an array
+ * of plain segments that belong to a single write (reply) chunk.
*
* Encoding key for single-list chunks (HLOO = Handle32 Length32 Offset64):
*
@@ -423,58 +458,57 @@ rpcrdma_encode_write_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
* N elements:
* 1 - N - HLOO - HLOO - ... - HLOO
*
- * Returns a pointer to the XDR word in the RDMA header following
- * the end of the Reply chunk, or an error pointer.
+ * Returns zero on success, or a negative errno if a failure occurred.
+ * @xdr is advanced to the next position in the stream.
*/
-static __be32 *
-rpcrdma_encode_reply_chunk(struct rpcrdma_xprt *r_xprt,
- struct rpcrdma_req *req, struct rpc_rqst *rqst,
- __be32 *iptr, enum rpcrdma_chunktype wtype)
+static noinline int
+rpcrdma_encode_reply_chunk(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
+ struct rpc_rqst *rqst, enum rpcrdma_chunktype wtype)
{
+ struct xdr_stream *xdr = &req->rl_stream;
struct rpcrdma_mr_seg *seg;
struct rpcrdma_mw *mw;
- int n, nsegs, nchunks;
+ int nsegs, nchunks;
__be32 *segcount;
- if (wtype != rpcrdma_replych) {
- *iptr++ = xdr_zero; /* no Reply chunk present */
- return iptr;
- }
-
seg = req->rl_segments;
nsegs = rpcrdma_convert_iovs(r_xprt, &rqst->rq_rcv_buf, 0, wtype, seg);
if (nsegs < 0)
- return ERR_PTR(nsegs);
+ return nsegs;
- *iptr++ = xdr_one; /* Reply chunk present */
- segcount = iptr++; /* save location of segment count */
+ if (encode_item_present(xdr) < 0)
+ return -EMSGSIZE;
+ segcount = xdr_reserve_space(xdr, sizeof(*segcount));
+ if (unlikely(!segcount))
+ return -EMSGSIZE;
+ /* Actual value encoded below */
nchunks = 0;
do {
- n = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs,
- true, &mw);
- if (n < 0)
- return ERR_PTR(n);
+ seg = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs,
+ true, &mw);
+ if (IS_ERR(seg))
+ return PTR_ERR(seg);
rpcrdma_push_mw(mw, &req->rl_registered);
- iptr = xdr_encode_rdma_segment(iptr, mw);
+ if (encode_rdma_segment(xdr, mw) < 0)
+ return -EMSGSIZE;
dprintk("RPC: %5u %s: %u@0x%016llx:0x%08x (%s)\n",
rqst->rq_task->tk_pid, __func__,
mw->mw_length, (unsigned long long)mw->mw_offset,
- mw->mw_handle, n < nsegs ? "more" : "last");
+ mw->mw_handle, mw->mw_nents < nsegs ? "more" : "last");
r_xprt->rx_stats.reply_chunk_count++;
r_xprt->rx_stats.total_rdma_request += seg->mr_len;
nchunks++;
- seg += n;
- nsegs -= n;
+ nsegs -= mw->mw_nents;
} while (nsegs);
/* Update count of segments in the Reply chunk */
*segcount = cpu_to_be32(nchunks);
- return iptr;
+ return 0;
}
/* Prepare the RPC-over-RDMA header SGE.
@@ -651,37 +685,52 @@ rpcrdma_unmap_sges(struct rpcrdma_ia *ia, struct rpcrdma_req *req)
req->rl_mapped_sges = 0;
}
-/*
- * Marshal a request: the primary job of this routine is to choose
- * the transfer modes. See comments below.
+/**
+ * rpcrdma_marshal_req - Marshal and send one RPC request
+ * @r_xprt: controlling transport
+ * @rqst: RPC request to be marshaled
+ *
+ * For the RPC in "rqst", this function:
+ * - Chooses the transfer mode (eg., RDMA_MSG or RDMA_NOMSG)
+ * - Registers Read, Write, and Reply chunks
+ * - Constructs the transport header
+ * - Posts a Send WR to send the transport header and request
*
- * Returns zero on success, otherwise a negative errno.
+ * Returns:
+ * %0 if the RPC was sent successfully,
+ * %-ENOTCONN if the connection was lost,
+ * %-EAGAIN if not enough pages are available for on-demand reply buffer,
+ * %-ENOBUFS if no MRs are available to register chunks,
+ * %-EMSGSIZE if the transport header is too small,
+ * %-EIO if a permanent problem occurred while marshaling.
*/
-
int
-rpcrdma_marshal_req(struct rpc_rqst *rqst)
+rpcrdma_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst)
{
- struct rpc_xprt *xprt = rqst->rq_xprt;
- struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
+ struct xdr_stream *xdr = &req->rl_stream;
enum rpcrdma_chunktype rtype, wtype;
- struct rpcrdma_msg *headerp;
bool ddp_allowed;
- ssize_t hdrlen;
- size_t rpclen;
- __be32 *iptr;
+ __be32 *p;
+ int ret;
#if defined(CONFIG_SUNRPC_BACKCHANNEL)
if (test_bit(RPC_BC_PA_IN_USE, &rqst->rq_bc_pa_state))
return rpcrdma_bc_marshal_reply(rqst);
#endif
- headerp = rdmab_to_msg(req->rl_rdmabuf);
- /* don't byte-swap XID, it's already done in request */
- headerp->rm_xid = rqst->rq_xid;
- headerp->rm_vers = rpcrdma_version;
- headerp->rm_credit = cpu_to_be32(r_xprt->rx_buf.rb_max_requests);
- headerp->rm_type = rdma_msg;
+ rpcrdma_set_xdrlen(&req->rl_hdrbuf, 0);
+ xdr_init_encode(xdr, &req->rl_hdrbuf,
+ req->rl_rdmabuf->rg_base);
+
+ /* Fixed header fields */
+ ret = -EMSGSIZE;
+ p = xdr_reserve_space(xdr, 4 * sizeof(*p));
+ if (!p)
+ goto out_err;
+ *p++ = rqst->rq_xid;
+ *p++ = rpcrdma_version;
+ *p++ = cpu_to_be32(r_xprt->rx_buf.rb_max_requests);
/* When the ULP employs a GSS flavor that guarantees integrity
* or privacy, direct data placement of individual data items
@@ -721,22 +770,17 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
* by themselves are larger than the inline threshold.
*/
if (rpcrdma_args_inline(r_xprt, rqst)) {
+ *p++ = rdma_msg;
rtype = rpcrdma_noch;
- rpclen = rqst->rq_snd_buf.len;
} else if (ddp_allowed && rqst->rq_snd_buf.flags & XDRBUF_WRITE) {
+ *p++ = rdma_msg;
rtype = rpcrdma_readch;
- rpclen = rqst->rq_snd_buf.head[0].iov_len +
- rqst->rq_snd_buf.tail[0].iov_len;
} else {
r_xprt->rx_stats.nomsg_call_count++;
- headerp->rm_type = htonl(RDMA_NOMSG);
+ *p++ = rdma_nomsg;
rtype = rpcrdma_areadch;
- rpclen = 0;
}
- req->rl_xid = rqst->rq_xid;
- rpcrdma_insert_req(&r_xprt->rx_buf, req);
-
/* This implementation supports the following combinations
* of chunk lists in one RPC-over-RDMA Call message:
*
@@ -759,79 +803,50 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
* send a Call message with a Position Zero Read chunk and a
* regular Read chunk at the same time.
*/
- iptr = headerp->rm_body.rm_chunks;
- iptr = rpcrdma_encode_read_list(r_xprt, req, rqst, iptr, rtype);
- if (IS_ERR(iptr))
+ if (rtype != rpcrdma_noch) {
+ ret = rpcrdma_encode_read_list(r_xprt, req, rqst, rtype);
+ if (ret)
+ goto out_err;
+ }
+ ret = encode_item_not_present(xdr);
+ if (ret)
goto out_err;
- iptr = rpcrdma_encode_write_list(r_xprt, req, rqst, iptr, wtype);
- if (IS_ERR(iptr))
+
+ if (wtype == rpcrdma_writech) {
+ ret = rpcrdma_encode_write_list(r_xprt, req, rqst, wtype);
+ if (ret)
+ goto out_err;
+ }
+ ret = encode_item_not_present(xdr);
+ if (ret)
goto out_err;
- iptr = rpcrdma_encode_reply_chunk(r_xprt, req, rqst, iptr, wtype);
- if (IS_ERR(iptr))
+
+ if (wtype != rpcrdma_replych)
+ ret = encode_item_not_present(xdr);
+ else
+ ret = rpcrdma_encode_reply_chunk(r_xprt, req, rqst, wtype);
+ if (ret)
goto out_err;
- hdrlen = (unsigned char *)iptr - (unsigned char *)headerp;
- dprintk("RPC: %5u %s: %s/%s: hdrlen %zd rpclen %zd\n",
+ dprintk("RPC: %5u %s: %s/%s: hdrlen %u rpclen\n",
rqst->rq_task->tk_pid, __func__,
transfertypes[rtype], transfertypes[wtype],
- hdrlen, rpclen);
+ xdr_stream_pos(xdr));
- if (!rpcrdma_prepare_send_sges(&r_xprt->rx_ia, req, hdrlen,
+ if (!rpcrdma_prepare_send_sges(&r_xprt->rx_ia, req,
+ xdr_stream_pos(xdr),
&rqst->rq_snd_buf, rtype)) {
- iptr = ERR_PTR(-EIO);
+ ret = -EIO;
goto out_err;
}
return 0;
out_err:
- if (PTR_ERR(iptr) != -ENOBUFS) {
- pr_err("rpcrdma: rpcrdma_marshal_req failed, status %ld\n",
- PTR_ERR(iptr));
+ if (ret != -ENOBUFS) {
+ pr_err("rpcrdma: header marshaling failed (%d)\n", ret);
r_xprt->rx_stats.failed_marshal_count++;
}
- return PTR_ERR(iptr);
-}
-
-/*
- * Chase down a received write or reply chunklist to get length
- * RDMA'd by server. See map at rpcrdma_create_chunks()! :-)
- */
-static int
-rpcrdma_count_chunks(struct rpcrdma_rep *rep, int wrchunk, __be32 **iptrp)
-{
- unsigned int i, total_len;
- struct rpcrdma_write_chunk *cur_wchunk;
- char *base = (char *)rdmab_to_msg(rep->rr_rdmabuf);
-
- i = be32_to_cpu(**iptrp);
- cur_wchunk = (struct rpcrdma_write_chunk *) (*iptrp + 1);
- total_len = 0;
- while (i--) {
- struct rpcrdma_segment *seg = &cur_wchunk->wc_target;
- ifdebug(FACILITY) {
- u64 off;
- xdr_decode_hyper((__be32 *)&seg->rs_offset, &off);
- dprintk("RPC: %s: chunk %d@0x%016llx:0x%08x\n",
- __func__,
- be32_to_cpu(seg->rs_length),
- (unsigned long long)off,
- be32_to_cpu(seg->rs_handle));
- }
- total_len += be32_to_cpu(seg->rs_length);
- ++cur_wchunk;
- }
- /* check and adjust for properly terminated write chunk */
- if (wrchunk) {
- __be32 *w = (__be32 *) cur_wchunk;
- if (*w++ != xdr_zero)
- return -1;
- cur_wchunk = (struct rpcrdma_write_chunk *) w;
- }
- if ((char *)cur_wchunk > base + rep->rr_len)
- return -1;
-
- *iptrp = (__be32 *) cur_wchunk;
- return total_len;
+ return ret;
}
/**
@@ -949,37 +964,254 @@ rpcrdma_mark_remote_invalidation(struct list_head *mws,
}
}
-#if defined(CONFIG_SUNRPC_BACKCHANNEL)
/* By convention, backchannel calls arrive via rdma_msg type
* messages, and never populate the chunk lists. This makes
* the RPC/RDMA header small and fixed in size, so it is
* straightforward to check the RPC header's direction field.
*/
static bool
-rpcrdma_is_bcall(struct rpcrdma_msg *headerp)
+rpcrdma_is_bcall(struct rpcrdma_xprt *r_xprt, struct rpcrdma_rep *rep,
+ __be32 xid, __be32 proc)
+#if defined(CONFIG_SUNRPC_BACKCHANNEL)
{
- __be32 *p = (__be32 *)headerp;
+ struct xdr_stream *xdr = &rep->rr_stream;
+ __be32 *p;
- if (headerp->rm_type != rdma_msg)
+ if (proc != rdma_msg)
return false;
- if (headerp->rm_body.rm_chunks[0] != xdr_zero)
+
+ /* Peek at stream contents without advancing. */
+ p = xdr_inline_decode(xdr, 0);
+
+ /* Chunk lists */
+ if (*p++ != xdr_zero)
return false;
- if (headerp->rm_body.rm_chunks[1] != xdr_zero)
+ if (*p++ != xdr_zero)
return false;
- if (headerp->rm_body.rm_chunks[2] != xdr_zero)
+ if (*p++ != xdr_zero)
return false;
- /* sanity */
- if (p[7] != headerp->rm_xid)
+ /* RPC header */
+ if (*p++ != xid)
return false;
- /* call direction */
- if (p[8] != cpu_to_be32(RPC_CALL))
+ if (*p != cpu_to_be32(RPC_CALL))
return false;
+ /* Now that we are sure this is a backchannel call,
+ * advance to the RPC header.
+ */
+ p = xdr_inline_decode(xdr, 3 * sizeof(*p));
+ if (unlikely(!p))
+ goto out_short;
+
+ rpcrdma_bc_receive_call(r_xprt, rep);
+ return true;
+
+out_short:
+ pr_warn("RPC/RDMA short backward direction call\n");
+ if (rpcrdma_ep_post_recv(&r_xprt->rx_ia, rep))
+ xprt_disconnect_done(&r_xprt->rx_xprt);
return true;
}
+#else /* CONFIG_SUNRPC_BACKCHANNEL */
+{
+ return false;
+}
#endif /* CONFIG_SUNRPC_BACKCHANNEL */
+static int decode_rdma_segment(struct xdr_stream *xdr, u32 *length)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, 4 * sizeof(*p));
+ if (unlikely(!p))
+ return -EIO;
+
+ ifdebug(FACILITY) {
+ u64 offset;
+ u32 handle;
+
+ handle = be32_to_cpup(p++);
+ *length = be32_to_cpup(p++);
+ xdr_decode_hyper(p, &offset);
+ dprintk("RPC: %s: segment %u@0x%016llx:0x%08x\n",
+ __func__, *length, (unsigned long long)offset,
+ handle);
+ } else {
+ *length = be32_to_cpup(p + 1);
+ }
+
+ return 0;
+}
+
+static int decode_write_chunk(struct xdr_stream *xdr, u32 *length)
+{
+ u32 segcount, seglength;
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, sizeof(*p));
+ if (unlikely(!p))
+ return -EIO;
+
+ *length = 0;
+ segcount = be32_to_cpup(p);
+ while (segcount--) {
+ if (decode_rdma_segment(xdr, &seglength))
+ return -EIO;
+ *length += seglength;
+ }
+
+ dprintk("RPC: %s: segcount=%u, %u bytes\n",
+ __func__, be32_to_cpup(p), *length);
+ return 0;
+}
+
+/* In RPC-over-RDMA Version One replies, a Read list is never
+ * expected. This decoder is a stub that returns an error if
+ * a Read list is present.
+ */
+static int decode_read_list(struct xdr_stream *xdr)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, sizeof(*p));
+ if (unlikely(!p))
+ return -EIO;
+ if (unlikely(*p != xdr_zero))
+ return -EIO;
+ return 0;
+}
+
+/* Supports only one Write chunk in the Write list
+ */
+static int decode_write_list(struct xdr_stream *xdr, u32 *length)
+{
+ u32 chunklen;
+ bool first;
+ __be32 *p;
+
+ *length = 0;
+ first = true;
+ do {
+ p = xdr_inline_decode(xdr, sizeof(*p));
+ if (unlikely(!p))
+ return -EIO;
+ if (*p == xdr_zero)
+ break;
+ if (!first)
+ return -EIO;
+
+ if (decode_write_chunk(xdr, &chunklen))
+ return -EIO;
+ *length += chunklen;
+ first = false;
+ } while (true);
+ return 0;
+}
+
+static int decode_reply_chunk(struct xdr_stream *xdr, u32 *length)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, sizeof(*p));
+ if (unlikely(!p))
+ return -EIO;
+
+ *length = 0;
+ if (*p != xdr_zero)
+ if (decode_write_chunk(xdr, length))
+ return -EIO;
+ return 0;
+}
+
+static int
+rpcrdma_decode_msg(struct rpcrdma_xprt *r_xprt, struct rpcrdma_rep *rep,
+ struct rpc_rqst *rqst)
+{
+ struct xdr_stream *xdr = &rep->rr_stream;
+ u32 writelist, replychunk, rpclen;
+ char *base;
+
+ /* Decode the chunk lists */
+ if (decode_read_list(xdr))
+ return -EIO;
+ if (decode_write_list(xdr, &writelist))
+ return -EIO;
+ if (decode_reply_chunk(xdr, &replychunk))
+ return -EIO;
+
+ /* RDMA_MSG sanity checks */
+ if (unlikely(replychunk))
+ return -EIO;
+
+ /* Build the RPC reply's Payload stream in rqst->rq_rcv_buf */
+ base = (char *)xdr_inline_decode(xdr, 0);
+ rpclen = xdr_stream_remaining(xdr);
+ r_xprt->rx_stats.fixup_copy_count +=
+ rpcrdma_inline_fixup(rqst, base, rpclen, writelist & 3);
+
+ r_xprt->rx_stats.total_rdma_reply += writelist;
+ return rpclen + xdr_align_size(writelist);
+}
+
+static noinline int
+rpcrdma_decode_nomsg(struct rpcrdma_xprt *r_xprt, struct rpcrdma_rep *rep)
+{
+ struct xdr_stream *xdr = &rep->rr_stream;
+ u32 writelist, replychunk;
+
+ /* Decode the chunk lists */
+ if (decode_read_list(xdr))
+ return -EIO;
+ if (decode_write_list(xdr, &writelist))
+ return -EIO;
+ if (decode_reply_chunk(xdr, &replychunk))
+ return -EIO;
+
+ /* RDMA_NOMSG sanity checks */
+ if (unlikely(writelist))
+ return -EIO;
+ if (unlikely(!replychunk))
+ return -EIO;
+
+ /* Reply chunk buffer already is the reply vector */
+ r_xprt->rx_stats.total_rdma_reply += replychunk;
+ return replychunk;
+}
+
+static noinline int
+rpcrdma_decode_error(struct rpcrdma_xprt *r_xprt, struct rpcrdma_rep *rep,
+ struct rpc_rqst *rqst)
+{
+ struct xdr_stream *xdr = &rep->rr_stream;
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, sizeof(*p));
+ if (unlikely(!p))
+ return -EIO;
+
+ switch (*p) {
+ case err_vers:
+ p = xdr_inline_decode(xdr, 2 * sizeof(*p));
+ if (!p)
+ break;
+ dprintk("RPC: %5u: %s: server reports version error (%u-%u)\n",
+ rqst->rq_task->tk_pid, __func__,
+ be32_to_cpup(p), be32_to_cpu(*(p + 1)));
+ break;
+ case err_chunk:
+ dprintk("RPC: %5u: %s: server reports header decoding error\n",
+ rqst->rq_task->tk_pid, __func__);
+ break;
+ default:
+ dprintk("RPC: %5u: %s: server reports unrecognized error %d\n",
+ rqst->rq_task->tk_pid, __func__, be32_to_cpup(p));
+ }
+
+ r_xprt->rx_stats.bad_reply_count++;
+ return -EREMOTEIO;
+}
+
/* Process received RPC/RDMA messages.
*
* Errors must result in the RPC task either being awakened, or
@@ -991,51 +1223,48 @@ rpcrdma_reply_handler(struct work_struct *work)
struct rpcrdma_rep *rep =
container_of(work, struct rpcrdma_rep, rr_work);
struct rpcrdma_xprt *r_xprt = rep->rr_rxprt;
- struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
struct rpc_xprt *xprt = &r_xprt->rx_xprt;
- struct rpcrdma_msg *headerp;
+ struct xdr_stream *xdr = &rep->rr_stream;
struct rpcrdma_req *req;
struct rpc_rqst *rqst;
- __be32 *iptr;
- int rdmalen, status, rmerr;
+ __be32 *p, xid, vers, proc;
unsigned long cwnd;
- struct list_head mws;
+ int status;
dprintk("RPC: %s: incoming rep %p\n", __func__, rep);
- if (rep->rr_len == RPCRDMA_BAD_LEN)
+ if (rep->rr_hdrbuf.head[0].iov_len == 0)
goto out_badstatus;
- if (rep->rr_len < RPCRDMA_HDRLEN_ERR)
+
+ xdr_init_decode(xdr, &rep->rr_hdrbuf,
+ rep->rr_hdrbuf.head[0].iov_base);
+
+ /* Fixed transport header fields */
+ p = xdr_inline_decode(xdr, 4 * sizeof(*p));
+ if (unlikely(!p))
goto out_shortreply;
+ xid = *p++;
+ vers = *p++;
+ p++; /* credits */
+ proc = *p++;
- headerp = rdmab_to_msg(rep->rr_rdmabuf);
-#if defined(CONFIG_SUNRPC_BACKCHANNEL)
- if (rpcrdma_is_bcall(headerp))
- goto out_bcall;
-#endif
+ if (rpcrdma_is_bcall(r_xprt, rep, xid, proc))
+ return;
/* Match incoming rpcrdma_rep to an rpcrdma_req to
* get context for handling any incoming chunks.
*/
- spin_lock(&buf->rb_lock);
- req = rpcrdma_lookup_req_locked(&r_xprt->rx_buf,
- headerp->rm_xid);
- if (!req)
- goto out_nomatch;
- if (req->rl_reply)
- goto out_duplicate;
-
- list_replace_init(&req->rl_registered, &mws);
- rpcrdma_mark_remote_invalidation(&mws, rep);
-
- /* Avoid races with signals and duplicate replies
- * by marking this req as matched.
- */
+ spin_lock(&xprt->recv_lock);
+ rqst = xprt_lookup_rqst(xprt, xid);
+ if (!rqst)
+ goto out_norqst;
+ xprt_pin_rqst(rqst);
+ spin_unlock(&xprt->recv_lock);
+ req = rpcr_to_rdmar(rqst);
req->rl_reply = rep;
- spin_unlock(&buf->rb_lock);
dprintk("RPC: %s: reply %p completes request %p (xid 0x%08x)\n",
- __func__, rep, req, be32_to_cpu(headerp->rm_xid));
+ __func__, rep, req, be32_to_cpu(xid));
/* Invalidate and unmap the data payloads before waking the
* waiting application. This guarantees the memory regions
@@ -1044,99 +1273,42 @@ rpcrdma_reply_handler(struct work_struct *work)
* waking the next RPC waits until this RPC has relinquished
* all its Send Queue entries.
*/
- if (!list_empty(&mws))
- r_xprt->rx_ia.ri_ops->ro_unmap_sync(r_xprt, &mws);
+ if (!list_empty(&req->rl_registered)) {
+ rpcrdma_mark_remote_invalidation(&req->rl_registered, rep);
+ r_xprt->rx_ia.ri_ops->ro_unmap_sync(r_xprt,
+ &req->rl_registered);
+ }
- /* Perform XID lookup, reconstruction of the RPC reply, and
- * RPC completion while holding the transport lock to ensure
- * the rep, rqst, and rq_task pointers remain stable.
- */
- spin_lock_bh(&xprt->transport_lock);
- rqst = xprt_lookup_rqst(xprt, headerp->rm_xid);
- if (!rqst)
- goto out_norqst;
xprt->reestablish_timeout = 0;
- if (headerp->rm_vers != rpcrdma_version)
+ if (vers != rpcrdma_version)
goto out_badversion;
- /* check for expected message types */
- /* The order of some of these tests is important. */
- switch (headerp->rm_type) {
+ switch (proc) {
case rdma_msg:
- /* never expect read chunks */
- /* never expect reply chunks (two ways to check) */
- if (headerp->rm_body.rm_chunks[0] != xdr_zero ||
- (headerp->rm_body.rm_chunks[1] == xdr_zero &&
- headerp->rm_body.rm_chunks[2] != xdr_zero))
- goto badheader;
- if (headerp->rm_body.rm_chunks[1] != xdr_zero) {
- /* count any expected write chunks in read reply */
- /* start at write chunk array count */
- iptr = &headerp->rm_body.rm_chunks[2];
- rdmalen = rpcrdma_count_chunks(rep, 1, &iptr);
- /* check for validity, and no reply chunk after */
- if (rdmalen < 0 || *iptr++ != xdr_zero)
- goto badheader;
- rep->rr_len -=
- ((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 +
- RPCRDMA_HDRLEN_MIN);
- rep->rr_len -= RPCRDMA_HDRLEN_MIN;
- status = rep->rr_len;
- }
-
- r_xprt->rx_stats.fixup_copy_count +=
- rpcrdma_inline_fixup(rqst, (char *)iptr, rep->rr_len,
- rdmalen);
+ status = rpcrdma_decode_msg(r_xprt, rep, rqst);
break;
-
case rdma_nomsg:
- /* never expect read or write chunks, always reply chunks */
- if (headerp->rm_body.rm_chunks[0] != xdr_zero ||
- headerp->rm_body.rm_chunks[1] != xdr_zero ||
- headerp->rm_body.rm_chunks[2] != xdr_one)
- goto badheader;
- iptr = (__be32 *)((unsigned char *)headerp +
- RPCRDMA_HDRLEN_MIN);
- rdmalen = rpcrdma_count_chunks(rep, 0, &iptr);
- if (rdmalen < 0)
- goto badheader;
- r_xprt->rx_stats.total_rdma_reply += rdmalen;
- /* Reply chunk buffer already is the reply vector - no fixup. */
- status = rdmalen;
+ status = rpcrdma_decode_nomsg(r_xprt, rep);
break;
-
case rdma_error:
- goto out_rdmaerr;
-
-badheader:
+ status = rpcrdma_decode_error(r_xprt, rep, rqst);
+ break;
default:
- dprintk("RPC: %5u %s: invalid rpcrdma reply (type %u)\n",
- rqst->rq_task->tk_pid, __func__,
- be32_to_cpu(headerp->rm_type));
status = -EIO;
- r_xprt->rx_stats.bad_reply_count++;
- break;
}
+ if (status < 0)
+ goto out_badheader;
out:
+ spin_lock(&xprt->recv_lock);
cwnd = xprt->cwnd;
xprt->cwnd = atomic_read(&r_xprt->rx_buf.rb_credits) << RPC_CWNDSHIFT;
if (xprt->cwnd > cwnd)
xprt_release_rqst_cong(rqst->rq_task);
xprt_complete_rqst(rqst->rq_task, status);
- spin_unlock_bh(&xprt->transport_lock);
+ xprt_unpin_rqst(rqst);
+ spin_unlock(&xprt->recv_lock);
dprintk("RPC: %s: xprt_complete_rqst(0x%p, 0x%p, %d)\n",
__func__, xprt, rqst, status);
return;
@@ -1149,72 +1321,38 @@ out_badstatus:
}
return;
-#if defined(CONFIG_SUNRPC_BACKCHANNEL)
-out_bcall:
- rpcrdma_bc_receive_call(r_xprt, rep);
- return;
-#endif
-
/* If the incoming reply terminated a pending RPC, the next
* RPC call will post a replacement receive buffer as it is
* being marshaled.
*/
out_badversion:
dprintk("RPC: %s: invalid version %d\n",
- __func__, be32_to_cpu(headerp->rm_vers));
+ __func__, be32_to_cpu(vers));
status = -EIO;
r_xprt->rx_stats.bad_reply_count++;
goto out;
-out_rdmaerr:
- rmerr = be32_to_cpu(headerp->rm_body.rm_error.rm_err);
- switch (rmerr) {
- case ERR_VERS:
- pr_err("%s: server reports header version error (%u-%u)\n",
- __func__,
- be32_to_cpu(headerp->rm_body.rm_error.rm_vers_low),
- be32_to_cpu(headerp->rm_body.rm_error.rm_vers_high));
- break;
- case ERR_CHUNK:
- pr_err("%s: server reports header decoding error\n",
- __func__);
- break;
- default:
- pr_err("%s: server reports unknown error %d\n",
- __func__, rmerr);
- }
- status = -EREMOTEIO;
+out_badheader:
+ dprintk("RPC: %5u %s: invalid rpcrdma reply (type %u)\n",
+ rqst->rq_task->tk_pid, __func__, be32_to_cpu(proc));
r_xprt->rx_stats.bad_reply_count++;
+ status = -EIO;
goto out;
-/* The req was still available, but by the time the transport_lock
+/* The req was still available, but by the time the recv_lock
* was acquired, the rqst and task had been released. Thus the RPC
* has already been terminated.
*/
out_norqst:
- spin_unlock_bh(&xprt->transport_lock);
- rpcrdma_buffer_put(req);
- dprintk("RPC: %s: race, no rqst left for req %p\n",
- __func__, req);
- return;
+ spin_unlock(&xprt->recv_lock);
+ dprintk("RPC: %s: no match for incoming xid 0x%08x\n",
+ __func__, be32_to_cpu(xid));
+ goto repost;
out_shortreply:
dprintk("RPC: %s: short/invalid reply\n", __func__);
goto repost;
-out_nomatch:
- spin_unlock(&buf->rb_lock);
- dprintk("RPC: %s: no match for incoming xid 0x%08x len %d\n",
- __func__, be32_to_cpu(headerp->rm_xid),
- rep->rr_len);
- goto repost;
-
-out_duplicate:
- spin_unlock(&buf->rb_lock);
- dprintk("RPC: %s: "
- "duplicate reply %p to RPC request %p: xid 0x%08x\n",
- __func__, rep, req, be32_to_cpu(headerp->rm_xid));
-
/* If no pending RPC transaction was matched, post a replacement
* receive buffer before returning.
*/
diff --git a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c
index c676ed0efb5a..ec37ad83b068 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c
@@ -52,7 +52,7 @@ int svc_rdma_handle_bc_reply(struct rpc_xprt *xprt, __be32 *rdma_resp,
if (src->iov_len < 24)
goto out_shortreply;
- spin_lock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->recv_lock);
req = xprt_lookup_rqst(xprt, xid);
if (!req)
goto out_notfound;
@@ -69,17 +69,20 @@ int svc_rdma_handle_bc_reply(struct rpc_xprt *xprt, __be32 *rdma_resp,
else if (credits > r_xprt->rx_buf.rb_bc_max_requests)
credits = r_xprt->rx_buf.rb_bc_max_requests;
+ spin_lock_bh(&xprt->transport_lock);
cwnd = xprt->cwnd;
xprt->cwnd = credits << RPC_CWNDSHIFT;
if (xprt->cwnd > cwnd)
xprt_release_rqst_cong(req->rq_task);
+ spin_unlock_bh(&xprt->transport_lock);
+
ret = 0;
xprt_complete_rqst(req->rq_task, rcvbuf->len);
rcvbuf->len = 0;
out_unlock:
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
out:
return ret;
@@ -266,7 +269,7 @@ xprt_rdma_bc_put(struct rpc_xprt *xprt)
module_put(THIS_MODULE);
}
-static struct rpc_xprt_ops xprt_rdma_bc_procs = {
+static const struct rpc_xprt_ops xprt_rdma_bc_procs = {
.reserve_xprt = xprt_reserve_xprt_cong,
.release_xprt = xprt_release_xprt_cong,
.alloc_slot = xprt_alloc_slot,
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index d1c458e5ec4d..c84e2b644e13 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -149,7 +149,7 @@ static struct ctl_table sunrpc_table[] = {
#endif
-static struct rpc_xprt_ops xprt_rdma_procs; /*forward reference */
+static const struct rpc_xprt_ops xprt_rdma_procs;
static void
xprt_rdma_format_addresses4(struct rpc_xprt *xprt, struct sockaddr *sap)
@@ -559,6 +559,7 @@ rpcrdma_get_rdmabuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
r_xprt->rx_stats.hardway_register_count += size;
req->rl_rdmabuf = rb;
+ xdr_buf_init(&req->rl_hdrbuf, rb->rg_base, rdmab_length(rb));
return true;
}
@@ -684,7 +685,6 @@ xprt_rdma_free(struct rpc_task *task)
dprintk("RPC: %s: called on 0x%p\n", __func__, req->rl_reply);
- rpcrdma_remove_req(&r_xprt->rx_buf, req);
if (!list_empty(&req->rl_registered))
ia->ri_ops->ro_unmap_safe(r_xprt, req, !RPC_IS_ASYNC(task));
rpcrdma_unmap_sges(ia, req);
@@ -730,7 +730,7 @@ xprt_rdma_send_request(struct rpc_task *task)
if (unlikely(!list_empty(&req->rl_registered)))
r_xprt->rx_ia.ri_ops->ro_unmap_safe(r_xprt, req, false);
- rc = rpcrdma_marshal_req(rqst);
+ rc = rpcrdma_marshal_req(r_xprt, rqst);
if (rc < 0)
goto failed_marshal;
@@ -811,7 +811,7 @@ xprt_rdma_disable_swap(struct rpc_xprt *xprt)
* Plumbing for rpc transport switch and kernel module
*/
-static struct rpc_xprt_ops xprt_rdma_procs = {
+static const struct rpc_xprt_ops xprt_rdma_procs = {
.reserve_xprt = xprt_reserve_xprt_cong,
.release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */
.alloc_slot = xprt_alloc_slot,
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index e4171f2abe37..11a1fbf7e59e 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -139,14 +139,11 @@ rpcrdma_wc_send(struct ib_cq *cq, struct ib_wc *wc)
static void
rpcrdma_update_granted_credits(struct rpcrdma_rep *rep)
{
- struct rpcrdma_msg *rmsgp = rdmab_to_msg(rep->rr_rdmabuf);
struct rpcrdma_buffer *buffer = &rep->rr_rxprt->rx_buf;
+ __be32 *p = rep->rr_rdmabuf->rg_base;
u32 credits;
- if (rep->rr_len < RPCRDMA_HDRLEN_ERR)
- return;
-
- credits = be32_to_cpu(rmsgp->rm_credit);
+ credits = be32_to_cpup(p + 2);
if (credits == 0)
credits = 1; /* don't deadlock */
else if (credits > buffer->rb_max_requests)
@@ -173,21 +170,19 @@ rpcrdma_wc_receive(struct ib_cq *cq, struct ib_wc *wc)
goto out_fail;
/* status == SUCCESS means all fields in wc are trustworthy */
- if (wc->opcode != IB_WC_RECV)
- return;
-
dprintk("RPC: %s: rep %p opcode 'recv', length %u: success\n",
__func__, rep, wc->byte_len);
- rep->rr_len = wc->byte_len;
+ rpcrdma_set_xdrlen(&rep->rr_hdrbuf, wc->byte_len);
rep->rr_wc_flags = wc->wc_flags;
rep->rr_inv_rkey = wc->ex.invalidate_rkey;
ib_dma_sync_single_for_cpu(rdmab_device(rep->rr_rdmabuf),
rdmab_addr(rep->rr_rdmabuf),
- rep->rr_len, DMA_FROM_DEVICE);
+ wc->byte_len, DMA_FROM_DEVICE);
- rpcrdma_update_granted_credits(rep);
+ if (wc->byte_len >= RPCRDMA_HDRLEN_ERR)
+ rpcrdma_update_granted_credits(rep);
out_schedule:
queue_work(rpcrdma_receive_wq, &rep->rr_work);
@@ -198,7 +193,7 @@ out_fail:
pr_err("rpcrdma: Recv: %s (%u/0x%x)\n",
ib_wc_status_msg(wc->status),
wc->status, wc->vendor_err);
- rep->rr_len = RPCRDMA_BAD_LEN;
+ rpcrdma_set_xdrlen(&rep->rr_hdrbuf, 0);
goto out_schedule;
}
@@ -974,6 +969,8 @@ rpcrdma_create_rep(struct rpcrdma_xprt *r_xprt)
rc = PTR_ERR(rep->rr_rdmabuf);
goto out_free;
}
+ xdr_buf_init(&rep->rr_hdrbuf, rep->rr_rdmabuf->rg_base,
+ rdmab_length(rep->rr_rdmabuf));
rep->rr_cqe.done = rpcrdma_wc_receive;
rep->rr_rxprt = r_xprt;
@@ -1004,7 +1001,6 @@ rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt)
spin_lock_init(&buf->rb_recovery_lock);
INIT_LIST_HEAD(&buf->rb_mws);
INIT_LIST_HEAD(&buf->rb_all);
- INIT_LIST_HEAD(&buf->rb_pending);
INIT_LIST_HEAD(&buf->rb_stale_mrs);
INIT_DELAYED_WORK(&buf->rb_refresh_worker,
rpcrdma_mr_refresh_worker);
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index b282d3f8cdd8..e26a97d2f922 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -218,18 +218,17 @@ enum {
struct rpcrdma_rep {
struct ib_cqe rr_cqe;
- unsigned int rr_len;
int rr_wc_flags;
u32 rr_inv_rkey;
+ struct rpcrdma_regbuf *rr_rdmabuf;
struct rpcrdma_xprt *rr_rxprt;
struct work_struct rr_work;
+ struct xdr_buf rr_hdrbuf;
+ struct xdr_stream rr_stream;
struct list_head rr_list;
struct ib_recv_wr rr_recv_wr;
- struct rpcrdma_regbuf *rr_rdmabuf;
};
-#define RPCRDMA_BAD_LEN (~0U)
-
/*
* struct rpcrdma_mw - external memory region metadata
*
@@ -341,11 +340,12 @@ enum {
struct rpcrdma_buffer;
struct rpcrdma_req {
struct list_head rl_list;
- __be32 rl_xid;
unsigned int rl_mapped_sges;
unsigned int rl_connect_cookie;
struct rpcrdma_buffer *rl_buffer;
struct rpcrdma_rep *rl_reply;
+ struct xdr_stream rl_stream;
+ struct xdr_buf rl_hdrbuf;
struct ib_send_wr rl_send_wr;
struct ib_sge rl_send_sge[RPCRDMA_MAX_SEND_SGES];
struct rpcrdma_regbuf *rl_rdmabuf; /* xprt header */
@@ -403,7 +403,6 @@ struct rpcrdma_buffer {
int rb_send_count, rb_recv_count;
struct list_head rb_send_bufs;
struct list_head rb_recv_bufs;
- struct list_head rb_pending;
u32 rb_max_requests;
atomic_t rb_credits; /* most recent credit grant */
@@ -440,24 +439,27 @@ struct rpcrdma_create_data_internal {
* Statistics for RPCRDMA
*/
struct rpcrdma_stats {
+ /* accessed when sending a call */
unsigned long read_chunk_count;
unsigned long write_chunk_count;
unsigned long reply_chunk_count;
-
unsigned long long total_rdma_request;
- unsigned long long total_rdma_reply;
+ /* rarely accessed error counters */
unsigned long long pullup_copy_count;
- unsigned long long fixup_copy_count;
unsigned long hardway_register_count;
unsigned long failed_marshal_count;
unsigned long bad_reply_count;
- unsigned long nomsg_call_count;
- unsigned long bcall_count;
unsigned long mrs_recovered;
unsigned long mrs_orphaned;
unsigned long mrs_allocated;
+
+ /* accessed when receiving a reply */
+ unsigned long long total_rdma_reply;
+ unsigned long long fixup_copy_count;
unsigned long local_inv_needed;
+ unsigned long nomsg_call_count;
+ unsigned long bcall_count;
};
/*
@@ -465,7 +467,8 @@ struct rpcrdma_stats {
*/
struct rpcrdma_xprt;
struct rpcrdma_memreg_ops {
- int (*ro_map)(struct rpcrdma_xprt *,
+ struct rpcrdma_mr_seg *
+ (*ro_map)(struct rpcrdma_xprt *,
struct rpcrdma_mr_seg *, int, bool,
struct rpcrdma_mw **);
void (*ro_unmap_sync)(struct rpcrdma_xprt *,
@@ -552,34 +555,6 @@ void rpcrdma_destroy_req(struct rpcrdma_req *);
int rpcrdma_buffer_create(struct rpcrdma_xprt *);
void rpcrdma_buffer_destroy(struct rpcrdma_buffer *);
-static inline void
-rpcrdma_insert_req(struct rpcrdma_buffer *buffers, struct rpcrdma_req *req)
-{
- spin_lock(&buffers->rb_lock);
- if (list_empty(&req->rl_list))
- list_add_tail(&req->rl_list, &buffers->rb_pending);
- spin_unlock(&buffers->rb_lock);
-}
-
-static inline struct rpcrdma_req *
-rpcrdma_lookup_req_locked(struct rpcrdma_buffer *buffers, __be32 xid)
-{
- struct rpcrdma_req *pos;
-
- list_for_each_entry(pos, &buffers->rb_pending, rl_list)
- if (pos->rl_xid == xid)
- return pos;
- return NULL;
-}
-
-static inline void
-rpcrdma_remove_req(struct rpcrdma_buffer *buffers, struct rpcrdma_req *req)
-{
- spin_lock(&buffers->rb_lock);
- list_del(&req->rl_list);
- spin_unlock(&buffers->rb_lock);
-}
-
struct rpcrdma_mw *rpcrdma_get_mw(struct rpcrdma_xprt *);
void rpcrdma_put_mw(struct rpcrdma_xprt *, struct rpcrdma_mw *);
struct rpcrdma_req *rpcrdma_buffer_get(struct rpcrdma_buffer *);
@@ -638,10 +613,16 @@ enum rpcrdma_chunktype {
bool rpcrdma_prepare_send_sges(struct rpcrdma_ia *, struct rpcrdma_req *,
u32, struct xdr_buf *, enum rpcrdma_chunktype);
void rpcrdma_unmap_sges(struct rpcrdma_ia *, struct rpcrdma_req *);
-int rpcrdma_marshal_req(struct rpc_rqst *);
+int rpcrdma_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst);
void rpcrdma_set_max_header_sizes(struct rpcrdma_xprt *);
void rpcrdma_reply_handler(struct work_struct *work);
+static inline void rpcrdma_set_xdrlen(struct xdr_buf *xdr, size_t len)
+{
+ xdr->head[0].iov_len = len;
+ xdr->len = len;
+}
+
/* RPC/RDMA module init - xprtrdma/transport.c
*/
extern unsigned int xprt_rdma_max_inline_read;
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 4f154d388748..9b5de31aa429 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -969,10 +969,12 @@ static void xs_local_data_read_skb(struct rpc_xprt *xprt,
return;
/* Look up and lock the request corresponding to the given XID */
- spin_lock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->recv_lock);
rovr = xprt_lookup_rqst(xprt, *xp);
if (!rovr)
goto out_unlock;
+ xprt_pin_rqst(rovr);
+ spin_unlock(&xprt->recv_lock);
task = rovr->rq_task;
copied = rovr->rq_private_buf.buflen;
@@ -981,13 +983,16 @@ static void xs_local_data_read_skb(struct rpc_xprt *xprt,
if (xs_local_copy_to_xdr(&rovr->rq_private_buf, skb)) {
dprintk("RPC: sk_buff copy failed\n");
- goto out_unlock;
+ spin_lock(&xprt->recv_lock);
+ goto out_unpin;
}
+ spin_lock(&xprt->recv_lock);
xprt_complete_rqst(task, copied);
-
+out_unpin:
+ xprt_unpin_rqst(rovr);
out_unlock:
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
}
static void xs_local_data_receive(struct sock_xprt *transport)
@@ -1050,10 +1055,12 @@ static void xs_udp_data_read_skb(struct rpc_xprt *xprt,
return;
/* Look up and lock the request corresponding to the given XID */
- spin_lock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->recv_lock);
rovr = xprt_lookup_rqst(xprt, *xp);
if (!rovr)
goto out_unlock;
+ xprt_pin_rqst(rovr);
+ spin_unlock(&xprt->recv_lock);
task = rovr->rq_task;
if ((copied = rovr->rq_private_buf.buflen) > repsize)
@@ -1062,16 +1069,21 @@ static void xs_udp_data_read_skb(struct rpc_xprt *xprt,
/* Suck it into the iovec, verify checksum if not done by hw. */
if (csum_partial_copy_to_xdr(&rovr->rq_private_buf, skb)) {
__UDPX_INC_STATS(sk, UDP_MIB_INERRORS);
- goto out_unlock;
+ spin_lock(&xprt->recv_lock);
+ goto out_unpin;
}
__UDPX_INC_STATS(sk, UDP_MIB_INDATAGRAMS);
+ spin_lock_bh(&xprt->transport_lock);
xprt_adjust_cwnd(xprt, task, copied);
+ spin_unlock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->recv_lock);
xprt_complete_rqst(task, copied);
-
+out_unpin:
+ xprt_unpin_rqst(rovr);
out_unlock:
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
}
static void xs_udp_data_receive(struct sock_xprt *transport)
@@ -1277,25 +1289,12 @@ static inline void xs_tcp_read_common(struct rpc_xprt *xprt,
}
len = desc->count;
- if (len > transport->tcp_reclen - transport->tcp_offset) {
- struct xdr_skb_reader my_desc;
-
- len = transport->tcp_reclen - transport->tcp_offset;
- memcpy(&my_desc, desc, sizeof(my_desc));
- my_desc.count = len;
- r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied,
- &my_desc, xdr_skb_read_bits);
- desc->count -= r;
- desc->offset += r;
- } else
- r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied,
+ if (len > transport->tcp_reclen - transport->tcp_offset)
+ desc->count = transport->tcp_reclen - transport->tcp_offset;
+ r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied,
desc, xdr_skb_read_bits);
- if (r > 0) {
- transport->tcp_copied += r;
- transport->tcp_offset += r;
- }
- if (r != len) {
+ if (desc->count) {
/* Error when copying to the receive buffer,
* usually because we weren't able to allocate
* additional buffer pages. All we can do now
@@ -1315,6 +1314,10 @@ static inline void xs_tcp_read_common(struct rpc_xprt *xprt,
return;
}
+ transport->tcp_copied += r;
+ transport->tcp_offset += r;
+ desc->count = len - r;
+
dprintk("RPC: XID %08x read %zd bytes\n",
ntohl(transport->tcp_xid), r);
dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, "
@@ -1343,21 +1346,24 @@ static inline int xs_tcp_read_reply(struct rpc_xprt *xprt,
dprintk("RPC: read reply XID %08x\n", ntohl(transport->tcp_xid));
/* Find and lock the request corresponding to this xid */
- spin_lock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->recv_lock);
req = xprt_lookup_rqst(xprt, transport->tcp_xid);
if (!req) {
dprintk("RPC: XID %08x request not found!\n",
ntohl(transport->tcp_xid));
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
return -1;
}
+ xprt_pin_rqst(req);
+ spin_unlock(&xprt->recv_lock);
xs_tcp_read_common(xprt, desc, req);
+ spin_lock(&xprt->recv_lock);
if (!(transport->tcp_flags & TCP_RCV_COPY_DATA))
xprt_complete_rqst(req->rq_task, transport->tcp_copied);
-
- spin_unlock_bh(&xprt->transport_lock);
+ xprt_unpin_rqst(req);
+ spin_unlock(&xprt->recv_lock);
return 0;
}
@@ -1376,11 +1382,9 @@ static int xs_tcp_read_callback(struct rpc_xprt *xprt,
container_of(xprt, struct sock_xprt, xprt);
struct rpc_rqst *req;
- /* Look up and lock the request corresponding to the given XID */
- spin_lock_bh(&xprt->transport_lock);
+ /* Look up the request corresponding to the given XID */
req = xprt_lookup_bc_request(xprt, transport->tcp_xid);
if (req == NULL) {
- spin_unlock_bh(&xprt->transport_lock);
printk(KERN_WARNING "Callback slot table overflowed\n");
xprt_force_disconnect(xprt);
return -1;
@@ -1391,7 +1395,6 @@ static int xs_tcp_read_callback(struct rpc_xprt *xprt,
if (!(transport->tcp_flags & TCP_RCV_COPY_DATA))
xprt_complete_bc_request(req, transport->tcp_copied);
- spin_unlock_bh(&xprt->transport_lock);
return 0;
}
@@ -1516,6 +1519,7 @@ static void xs_tcp_data_receive(struct sock_xprt *transport)
.arg.data = xprt,
};
unsigned long total = 0;
+ int loop;
int read = 0;
mutex_lock(&transport->recv_mutex);
@@ -1524,20 +1528,20 @@ static void xs_tcp_data_receive(struct sock_xprt *transport)
goto out;
/* We use rd_desc to pass struct xprt to xs_tcp_data_recv */
- for (;;) {
+ for (loop = 0; loop < 64; loop++) {
lock_sock(sk);
read = tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv);
if (read <= 0) {
clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state);
release_sock(sk);
- if (!test_bit(XPRT_SOCK_DATA_READY, &transport->sock_state))
- break;
- } else {
- release_sock(sk);
- total += read;
+ break;
}
+ release_sock(sk);
+ total += read;
rd_desc.count = 65536;
}
+ if (test_bit(XPRT_SOCK_DATA_READY, &transport->sock_state))
+ queue_work(xprtiod_workqueue, &transport->recv_worker);
out:
mutex_unlock(&transport->recv_mutex);
trace_xs_tcp_data_ready(xprt, read, total);
@@ -2724,7 +2728,7 @@ static void bc_destroy(struct rpc_xprt *xprt)
module_put(THIS_MODULE);
}
-static struct rpc_xprt_ops xs_local_ops = {
+static const struct rpc_xprt_ops xs_local_ops = {
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xs_tcp_release_xprt,
.alloc_slot = xprt_alloc_slot,
@@ -2742,7 +2746,7 @@ static struct rpc_xprt_ops xs_local_ops = {
.disable_swap = xs_disable_swap,
};
-static struct rpc_xprt_ops xs_udp_ops = {
+static const struct rpc_xprt_ops xs_udp_ops = {
.set_buffer_size = xs_udp_set_buffer_size,
.reserve_xprt = xprt_reserve_xprt_cong,
.release_xprt = xprt_release_xprt_cong,
@@ -2764,7 +2768,7 @@ static struct rpc_xprt_ops xs_udp_ops = {
.inject_disconnect = xs_inject_disconnect,
};
-static struct rpc_xprt_ops xs_tcp_ops = {
+static const struct rpc_xprt_ops xs_tcp_ops = {
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xs_tcp_release_xprt,
.alloc_slot = xprt_lock_and_alloc_slot,
@@ -2795,7 +2799,7 @@ static struct rpc_xprt_ops xs_tcp_ops = {
* The rpc_xprt_ops for the server backchannel
*/
-static struct rpc_xprt_ops bc_tcp_ops = {
+static const struct rpc_xprt_ops bc_tcp_ops = {
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xprt_release_xprt,
.alloc_slot = xprt_alloc_slot,
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-16 12:55:21 +0300