2 * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the BSD-type
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
17 * Redistributions in binary form must reproduce the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer in the documentation and/or other materials provided
20 * with the distribution.
22 * Neither the name of the Network Appliance, Inc. nor the names of
23 * its contributors may be used to endorse or promote products
24 * derived from this software without specific prior written
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
33 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
35 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 * This file contains the top-level implementation of an RPC RDMA
46 * Naming convention: functions beginning with xprt_ are part of the
47 * transport switch. All others are RPC RDMA internal.
50 #include <linux/module.h>
51 #include <linux/init.h>
52 #include <linux/slab.h>
53 #include <linux/seq_file.h>
54 #include <linux/sunrpc/addr.h>
56 #include "xprt_rdma.h"
59 # define RPCDBG_FACILITY RPCDBG_TRANS
62 MODULE_LICENSE("Dual BSD/GPL");
64 MODULE_DESCRIPTION("RPC/RDMA Transport for Linux kernel NFS");
65 MODULE_AUTHOR("Network Appliance, Inc.");
71 static unsigned int xprt_rdma_slot_table_entries
= RPCRDMA_DEF_SLOT_TABLE
;
72 static unsigned int xprt_rdma_max_inline_read
= RPCRDMA_DEF_INLINE
;
73 static unsigned int xprt_rdma_max_inline_write
= RPCRDMA_DEF_INLINE
;
74 static unsigned int xprt_rdma_inline_write_padding
;
75 static unsigned int xprt_rdma_memreg_strategy
= RPCRDMA_FRMR
;
76 int xprt_rdma_pad_optimize
= 0;
80 static unsigned int min_slot_table_size
= RPCRDMA_MIN_SLOT_TABLE
;
81 static unsigned int max_slot_table_size
= RPCRDMA_MAX_SLOT_TABLE
;
82 static unsigned int zero
;
83 static unsigned int max_padding
= PAGE_SIZE
;
84 static unsigned int min_memreg
= RPCRDMA_BOUNCEBUFFERS
;
85 static unsigned int max_memreg
= RPCRDMA_LAST
- 1;
87 static struct ctl_table_header
*sunrpc_table_header
;
89 static struct ctl_table xr_tunables_table
[] = {
91 .procname
= "rdma_slot_table_entries",
92 .data
= &xprt_rdma_slot_table_entries
,
93 .maxlen
= sizeof(unsigned int),
95 .proc_handler
= proc_dointvec_minmax
,
96 .extra1
= &min_slot_table_size
,
97 .extra2
= &max_slot_table_size
100 .procname
= "rdma_max_inline_read",
101 .data
= &xprt_rdma_max_inline_read
,
102 .maxlen
= sizeof(unsigned int),
104 .proc_handler
= proc_dointvec
,
107 .procname
= "rdma_max_inline_write",
108 .data
= &xprt_rdma_max_inline_write
,
109 .maxlen
= sizeof(unsigned int),
111 .proc_handler
= proc_dointvec
,
114 .procname
= "rdma_inline_write_padding",
115 .data
= &xprt_rdma_inline_write_padding
,
116 .maxlen
= sizeof(unsigned int),
118 .proc_handler
= proc_dointvec_minmax
,
120 .extra2
= &max_padding
,
123 .procname
= "rdma_memreg_strategy",
124 .data
= &xprt_rdma_memreg_strategy
,
125 .maxlen
= sizeof(unsigned int),
127 .proc_handler
= proc_dointvec_minmax
,
128 .extra1
= &min_memreg
,
129 .extra2
= &max_memreg
,
132 .procname
= "rdma_pad_optimize",
133 .data
= &xprt_rdma_pad_optimize
,
134 .maxlen
= sizeof(unsigned int),
136 .proc_handler
= proc_dointvec
,
141 static struct ctl_table sunrpc_table
[] = {
143 .procname
= "sunrpc",
145 .child
= xr_tunables_table
152 #define RPCRDMA_BIND_TO (60U * HZ)
153 #define RPCRDMA_INIT_REEST_TO (5U * HZ)
154 #define RPCRDMA_MAX_REEST_TO (30U * HZ)
155 #define RPCRDMA_IDLE_DISC_TO (5U * 60 * HZ)
157 static struct rpc_xprt_ops xprt_rdma_procs
; /* forward reference */
160 xprt_rdma_format_addresses(struct rpc_xprt
*xprt
)
162 struct sockaddr
*sap
= (struct sockaddr
*)
163 &rpcx_to_rdmad(xprt
).addr
;
164 struct sockaddr_in
*sin
= (struct sockaddr_in
*)sap
;
167 (void)rpc_ntop(sap
, buf
, sizeof(buf
));
168 xprt
->address_strings
[RPC_DISPLAY_ADDR
] = kstrdup(buf
, GFP_KERNEL
);
170 snprintf(buf
, sizeof(buf
), "%u", rpc_get_port(sap
));
171 xprt
->address_strings
[RPC_DISPLAY_PORT
] = kstrdup(buf
, GFP_KERNEL
);
173 xprt
->address_strings
[RPC_DISPLAY_PROTO
] = "rdma";
175 snprintf(buf
, sizeof(buf
), "%08x", ntohl(sin
->sin_addr
.s_addr
));
176 xprt
->address_strings
[RPC_DISPLAY_HEX_ADDR
] = kstrdup(buf
, GFP_KERNEL
);
178 snprintf(buf
, sizeof(buf
), "%4hx", rpc_get_port(sap
));
179 xprt
->address_strings
[RPC_DISPLAY_HEX_PORT
] = kstrdup(buf
, GFP_KERNEL
);
182 xprt
->address_strings
[RPC_DISPLAY_NETID
] = "rdma";
186 xprt_rdma_free_addresses(struct rpc_xprt
*xprt
)
190 for (i
= 0; i
< RPC_DISPLAY_MAX
; i
++)
192 case RPC_DISPLAY_PROTO
:
193 case RPC_DISPLAY_NETID
:
196 kfree(xprt
->address_strings
[i
]);
201 xprt_rdma_connect_worker(struct work_struct
*work
)
203 struct rpcrdma_xprt
*r_xprt
=
204 container_of(work
, struct rpcrdma_xprt
, rdma_connect
.work
);
205 struct rpc_xprt
*xprt
= &r_xprt
->xprt
;
208 xprt_clear_connected(xprt
);
210 dprintk("RPC: %s: %sconnect\n", __func__
,
211 r_xprt
->rx_ep
.rep_connected
!= 0 ? "re" : "");
212 rc
= rpcrdma_ep_connect(&r_xprt
->rx_ep
, &r_xprt
->rx_ia
);
214 xprt_wake_pending_tasks(xprt
, rc
);
216 dprintk("RPC: %s: exit\n", __func__
);
217 xprt_clear_connecting(xprt
);
224 * Free all memory associated with the object, including its own.
225 * NOTE: none of the *destroy methods free memory for their top-level
226 * objects, even though they may have allocated it (they do free
227 * private memory). It's up to the caller to handle it. In this
228 * case (RDMA transport), all structure memory is inlined with the
229 * struct rpcrdma_xprt.
232 xprt_rdma_destroy(struct rpc_xprt
*xprt
)
234 struct rpcrdma_xprt
*r_xprt
= rpcx_to_rdmax(xprt
);
236 dprintk("RPC: %s: called\n", __func__
);
238 cancel_delayed_work_sync(&r_xprt
->rdma_connect
);
240 xprt_clear_connected(xprt
);
242 rpcrdma_buffer_destroy(&r_xprt
->rx_buf
);
243 rpcrdma_ep_destroy(&r_xprt
->rx_ep
, &r_xprt
->rx_ia
);
244 rpcrdma_ia_close(&r_xprt
->rx_ia
);
246 xprt_rdma_free_addresses(xprt
);
250 dprintk("RPC: %s: returning\n", __func__
);
252 module_put(THIS_MODULE
);
255 static const struct rpc_timeout xprt_rdma_default_timeout
= {
256 .to_initval
= 60 * HZ
,
257 .to_maxval
= 60 * HZ
,
261 * xprt_setup_rdma - Set up transport to use RDMA
263 * @args: rpc transport arguments
265 static struct rpc_xprt
*
266 xprt_setup_rdma(struct xprt_create
*args
)
268 struct rpcrdma_create_data_internal cdata
;
269 struct rpc_xprt
*xprt
;
270 struct rpcrdma_xprt
*new_xprt
;
271 struct rpcrdma_ep
*new_ep
;
272 struct sockaddr_in
*sin
;
275 if (args
->addrlen
> sizeof(xprt
->addr
)) {
276 dprintk("RPC: %s: address too large\n", __func__
);
277 return ERR_PTR(-EBADF
);
280 xprt
= xprt_alloc(args
->net
, sizeof(struct rpcrdma_xprt
),
281 xprt_rdma_slot_table_entries
,
282 xprt_rdma_slot_table_entries
);
284 dprintk("RPC: %s: couldn't allocate rpcrdma_xprt\n",
286 return ERR_PTR(-ENOMEM
);
289 /* 60 second timeout, no retries */
290 xprt
->timeout
= &xprt_rdma_default_timeout
;
291 xprt
->bind_timeout
= RPCRDMA_BIND_TO
;
292 xprt
->reestablish_timeout
= RPCRDMA_INIT_REEST_TO
;
293 xprt
->idle_timeout
= RPCRDMA_IDLE_DISC_TO
;
295 xprt
->resvport
= 0; /* privileged port not needed */
296 xprt
->tsh_size
= 0; /* RPC-RDMA handles framing */
297 xprt
->ops
= &xprt_rdma_procs
;
300 * Set up RDMA-specific connect data.
303 /* Put server RDMA address in local cdata */
304 memcpy(&cdata
.addr
, args
->dstaddr
, args
->addrlen
);
306 /* Ensure xprt->addr holds valid server TCP (not RDMA)
307 * address, for any side protocols which peek at it */
308 xprt
->prot
= IPPROTO_TCP
;
309 xprt
->addrlen
= args
->addrlen
;
310 memcpy(&xprt
->addr
, &cdata
.addr
, xprt
->addrlen
);
312 sin
= (struct sockaddr_in
*)&cdata
.addr
;
313 if (ntohs(sin
->sin_port
) != 0)
314 xprt_set_bound(xprt
);
316 dprintk("RPC: %s: %pI4:%u\n",
317 __func__
, &sin
->sin_addr
.s_addr
, ntohs(sin
->sin_port
));
319 /* Set max requests */
320 cdata
.max_requests
= xprt
->max_reqs
;
322 /* Set some length limits */
323 cdata
.rsize
= RPCRDMA_MAX_SEGS
* PAGE_SIZE
; /* RDMA write max */
324 cdata
.wsize
= RPCRDMA_MAX_SEGS
* PAGE_SIZE
; /* RDMA read max */
326 cdata
.inline_wsize
= xprt_rdma_max_inline_write
;
327 if (cdata
.inline_wsize
> cdata
.wsize
)
328 cdata
.inline_wsize
= cdata
.wsize
;
330 cdata
.inline_rsize
= xprt_rdma_max_inline_read
;
331 if (cdata
.inline_rsize
> cdata
.rsize
)
332 cdata
.inline_rsize
= cdata
.rsize
;
334 cdata
.padding
= xprt_rdma_inline_write_padding
;
337 * Create new transport instance, which includes initialized
343 new_xprt
= rpcx_to_rdmax(xprt
);
345 rc
= rpcrdma_ia_open(new_xprt
, (struct sockaddr
*) &cdata
.addr
,
346 xprt_rdma_memreg_strategy
);
351 * initialize and create ep
353 new_xprt
->rx_data
= cdata
;
354 new_ep
= &new_xprt
->rx_ep
;
355 new_ep
->rep_remote_addr
= cdata
.addr
;
357 rc
= rpcrdma_ep_create(&new_xprt
->rx_ep
,
358 &new_xprt
->rx_ia
, &new_xprt
->rx_data
);
363 * Allocate pre-registered send and receive buffers for headers and
364 * any inline data. Also specify any padding which will be provided
365 * from a preregistered zero buffer.
367 rc
= rpcrdma_buffer_create(&new_xprt
->rx_buf
, new_ep
, &new_xprt
->rx_ia
,
373 * Register a callback for connection events. This is necessary because
374 * connection loss notification is async. We also catch connection loss
375 * when reaping receives.
377 INIT_DELAYED_WORK(&new_xprt
->rdma_connect
, xprt_rdma_connect_worker
);
378 new_ep
->rep_func
= rpcrdma_conn_func
;
379 new_ep
->rep_xprt
= xprt
;
381 xprt_rdma_format_addresses(xprt
);
382 xprt
->max_payload
= rpcrdma_max_payload(new_xprt
);
383 dprintk("RPC: %s: transport data payload maximum: %zu bytes\n",
384 __func__
, xprt
->max_payload
);
386 if (!try_module_get(THIS_MODULE
))
392 xprt_rdma_free_addresses(xprt
);
395 rpcrdma_ep_destroy(new_ep
, &new_xprt
->rx_ia
);
397 rpcrdma_ia_close(&new_xprt
->rx_ia
);
404 * Close a connection, during shutdown or timeout/reconnect
407 xprt_rdma_close(struct rpc_xprt
*xprt
)
409 struct rpcrdma_xprt
*r_xprt
= rpcx_to_rdmax(xprt
);
411 dprintk("RPC: %s: closing\n", __func__
);
412 if (r_xprt
->rx_ep
.rep_connected
> 0)
413 xprt
->reestablish_timeout
= 0;
414 xprt_disconnect_done(xprt
);
415 rpcrdma_ep_disconnect(&r_xprt
->rx_ep
, &r_xprt
->rx_ia
);
419 xprt_rdma_set_port(struct rpc_xprt
*xprt
, u16 port
)
421 struct sockaddr_in
*sap
;
423 sap
= (struct sockaddr_in
*)&xprt
->addr
;
424 sap
->sin_port
= htons(port
);
425 sap
= (struct sockaddr_in
*)&rpcx_to_rdmad(xprt
).addr
;
426 sap
->sin_port
= htons(port
);
427 dprintk("RPC: %s: %u\n", __func__
, port
);
431 xprt_rdma_connect(struct rpc_xprt
*xprt
, struct rpc_task
*task
)
433 struct rpcrdma_xprt
*r_xprt
= rpcx_to_rdmax(xprt
);
435 if (r_xprt
->rx_ep
.rep_connected
!= 0) {
437 schedule_delayed_work(&r_xprt
->rdma_connect
,
438 xprt
->reestablish_timeout
);
439 xprt
->reestablish_timeout
<<= 1;
440 if (xprt
->reestablish_timeout
> RPCRDMA_MAX_REEST_TO
)
441 xprt
->reestablish_timeout
= RPCRDMA_MAX_REEST_TO
;
442 else if (xprt
->reestablish_timeout
< RPCRDMA_INIT_REEST_TO
)
443 xprt
->reestablish_timeout
= RPCRDMA_INIT_REEST_TO
;
445 schedule_delayed_work(&r_xprt
->rdma_connect
, 0);
446 if (!RPC_IS_ASYNC(task
))
447 flush_delayed_work(&r_xprt
->rdma_connect
);
452 * The RDMA allocate/free functions need the task structure as a place
453 * to hide the struct rpcrdma_req, which is necessary for the actual send/recv
454 * sequence. For this reason, the recv buffers are attached to send
455 * buffers for portions of the RPC. Note that the RPC layer allocates
456 * both send and receive buffers in the same call. We may register
457 * the receive buffer portion when using reply chunks.
460 xprt_rdma_allocate(struct rpc_task
*task
, size_t size
)
462 struct rpc_xprt
*xprt
= task
->tk_rqstp
->rq_xprt
;
463 struct rpcrdma_req
*req
, *nreq
;
465 req
= rpcrdma_buffer_get(&rpcx_to_rdmax(xprt
)->rx_buf
);
469 if (size
> req
->rl_size
) {
470 dprintk("RPC: %s: size %zd too large for buffer[%zd]: "
471 "prog %d vers %d proc %d\n",
472 __func__
, size
, req
->rl_size
,
473 task
->tk_client
->cl_prog
, task
->tk_client
->cl_vers
,
474 task
->tk_msg
.rpc_proc
->p_proc
);
476 * Outgoing length shortage. Our inline write max must have
477 * been configured to perform direct i/o.
479 * This is therefore a large metadata operation, and the
480 * allocate call was made on the maximum possible message,
481 * e.g. containing long filename(s) or symlink data. In
482 * fact, while these metadata operations *might* carry
483 * large outgoing payloads, they rarely *do*. However, we
484 * have to commit to the request here, so reallocate and
485 * register it now. The data path will never require this
488 * If the allocation or registration fails, the RPC framework
489 * will (doggedly) retry.
491 if (task
->tk_flags
& RPC_TASK_SWAPPER
)
492 nreq
= kmalloc(sizeof *req
+ size
, GFP_ATOMIC
);
494 nreq
= kmalloc(sizeof *req
+ size
, GFP_NOFS
);
498 if (rpcrdma_register_internal(&rpcx_to_rdmax(xprt
)->rx_ia
,
499 nreq
->rl_base
, size
+ sizeof(struct rpcrdma_req
)
500 - offsetof(struct rpcrdma_req
, rl_base
),
501 &nreq
->rl_handle
, &nreq
->rl_iov
)) {
505 rpcx_to_rdmax(xprt
)->rx_stats
.hardway_register_count
+= size
;
506 nreq
->rl_size
= size
;
508 nreq
->rl_nchunks
= 0;
509 nreq
->rl_buffer
= (struct rpcrdma_buffer
*)req
;
510 nreq
->rl_reply
= req
->rl_reply
;
511 memcpy(nreq
->rl_segments
,
512 req
->rl_segments
, sizeof nreq
->rl_segments
);
513 /* flag the swap with an unused field */
514 nreq
->rl_iov
.length
= 0;
515 req
->rl_reply
= NULL
;
518 dprintk("RPC: %s: size %zd, request 0x%p\n", __func__
, size
, req
);
519 req
->rl_connect_cookie
= 0; /* our reserved value */
520 return req
->rl_xdr_buf
;
523 rpcrdma_buffer_put(req
);
524 rpcx_to_rdmax(xprt
)->rx_stats
.failed_marshal_count
++;
529 * This function returns all RDMA resources to the pool.
532 xprt_rdma_free(void *buffer
)
534 struct rpcrdma_req
*req
;
535 struct rpcrdma_xprt
*r_xprt
;
536 struct rpcrdma_rep
*rep
;
542 req
= container_of(buffer
, struct rpcrdma_req
, rl_xdr_buf
[0]);
543 if (req
->rl_iov
.length
== 0) { /* see allocate above */
544 r_xprt
= container_of(((struct rpcrdma_req
*) req
->rl_buffer
)->rl_buffer
,
545 struct rpcrdma_xprt
, rx_buf
);
547 r_xprt
= container_of(req
->rl_buffer
, struct rpcrdma_xprt
, rx_buf
);
550 dprintk("RPC: %s: called on 0x%p%s\n",
551 __func__
, rep
, (rep
&& rep
->rr_func
) ? " (with waiter)" : "");
554 * Finish the deregistration. The process is considered
555 * complete when the rr_func vector becomes NULL - this
556 * was put in place during rpcrdma_reply_handler() - the wait
557 * call below will not block if the dereg is "done". If
558 * interrupted, our framework will clean up.
560 for (i
= 0; req
->rl_nchunks
;) {
562 i
+= rpcrdma_deregister_external(
563 &req
->rl_segments
[i
], r_xprt
);
566 if (req
->rl_iov
.length
== 0) { /* see allocate above */
567 struct rpcrdma_req
*oreq
= (struct rpcrdma_req
*)req
->rl_buffer
;
568 oreq
->rl_reply
= req
->rl_reply
;
569 (void) rpcrdma_deregister_internal(&r_xprt
->rx_ia
,
576 /* Put back request+reply buffers */
577 rpcrdma_buffer_put(req
);
581 * send_request invokes the meat of RPC RDMA. It must do the following:
582 * 1. Marshal the RPC request into an RPC RDMA request, which means
583 * putting a header in front of data, and creating IOVs for RDMA
584 * from those in the request.
585 * 2. In marshaling, detect opportunities for RDMA, and use them.
586 * 3. Post a recv message to set up asynch completion, then send
587 * the request (rpcrdma_ep_post).
588 * 4. No partial sends are possible in the RPC-RDMA protocol (as in UDP).
592 xprt_rdma_send_request(struct rpc_task
*task
)
594 struct rpc_rqst
*rqst
= task
->tk_rqstp
;
595 struct rpc_xprt
*xprt
= rqst
->rq_xprt
;
596 struct rpcrdma_req
*req
= rpcr_to_rdmar(rqst
);
597 struct rpcrdma_xprt
*r_xprt
= rpcx_to_rdmax(xprt
);
600 if (req
->rl_niovs
== 0)
601 rc
= rpcrdma_marshal_req(rqst
);
602 else if (r_xprt
->rx_ia
.ri_memreg_strategy
== RPCRDMA_FRMR
)
603 rc
= rpcrdma_marshal_chunks(rqst
, 0);
607 if (req
->rl_reply
== NULL
) /* e.g. reconnection */
608 rpcrdma_recv_buffer_get(req
);
611 req
->rl_reply
->rr_func
= rpcrdma_reply_handler
;
612 /* this need only be done once, but... */
613 req
->rl_reply
->rr_xprt
= xprt
;
616 /* Must suppress retransmit to maintain credits */
617 if (req
->rl_connect_cookie
== xprt
->connect_cookie
)
618 goto drop_connection
;
619 req
->rl_connect_cookie
= xprt
->connect_cookie
;
621 if (rpcrdma_ep_post(&r_xprt
->rx_ia
, &r_xprt
->rx_ep
, req
))
622 goto drop_connection
;
624 rqst
->rq_xmit_bytes_sent
+= rqst
->rq_snd_buf
.len
;
625 rqst
->rq_bytes_sent
= 0;
629 r_xprt
->rx_stats
.failed_marshal_count
++;
630 dprintk("RPC: %s: rpcrdma_marshal_req failed, status %i\n",
635 xprt_disconnect_done(xprt
);
636 return -ENOTCONN
; /* implies disconnect */
639 static void xprt_rdma_print_stats(struct rpc_xprt
*xprt
, struct seq_file
*seq
)
641 struct rpcrdma_xprt
*r_xprt
= rpcx_to_rdmax(xprt
);
644 if (xprt_connected(xprt
))
645 idle_time
= (long)(jiffies
- xprt
->last_used
) / HZ
;
648 "\txprt:\trdma %u %lu %lu %lu %ld %lu %lu %lu %Lu %Lu "
649 "%lu %lu %lu %Lu %Lu %Lu %Lu %lu %lu %lu\n",
651 0, /* need a local port? */
652 xprt
->stat
.bind_count
,
653 xprt
->stat
.connect_count
,
654 xprt
->stat
.connect_time
,
662 r_xprt
->rx_stats
.read_chunk_count
,
663 r_xprt
->rx_stats
.write_chunk_count
,
664 r_xprt
->rx_stats
.reply_chunk_count
,
665 r_xprt
->rx_stats
.total_rdma_request
,
666 r_xprt
->rx_stats
.total_rdma_reply
,
667 r_xprt
->rx_stats
.pullup_copy_count
,
668 r_xprt
->rx_stats
.fixup_copy_count
,
669 r_xprt
->rx_stats
.hardway_register_count
,
670 r_xprt
->rx_stats
.failed_marshal_count
,
671 r_xprt
->rx_stats
.bad_reply_count
);
675 * Plumbing for rpc transport switch and kernel module
678 static struct rpc_xprt_ops xprt_rdma_procs
= {
679 .reserve_xprt
= xprt_reserve_xprt_cong
,
680 .release_xprt
= xprt_release_xprt_cong
, /* sunrpc/xprt.c */
681 .alloc_slot
= xprt_alloc_slot
,
682 .release_request
= xprt_release_rqst_cong
, /* ditto */
683 .set_retrans_timeout
= xprt_set_retrans_timeout_def
, /* ditto */
684 .rpcbind
= rpcb_getport_async
, /* sunrpc/rpcb_clnt.c */
685 .set_port
= xprt_rdma_set_port
,
686 .connect
= xprt_rdma_connect
,
687 .buf_alloc
= xprt_rdma_allocate
,
688 .buf_free
= xprt_rdma_free
,
689 .send_request
= xprt_rdma_send_request
,
690 .close
= xprt_rdma_close
,
691 .destroy
= xprt_rdma_destroy
,
692 .print_stats
= xprt_rdma_print_stats
695 static struct xprt_class xprt_rdma
= {
696 .list
= LIST_HEAD_INIT(xprt_rdma
.list
),
698 .owner
= THIS_MODULE
,
699 .ident
= XPRT_TRANSPORT_RDMA
,
700 .setup
= xprt_setup_rdma
,
703 static void __exit
xprt_rdma_cleanup(void)
707 dprintk("RPCRDMA Module Removed, deregister RPC RDMA transport\n");
709 if (sunrpc_table_header
) {
710 unregister_sysctl_table(sunrpc_table_header
);
711 sunrpc_table_header
= NULL
;
714 rc
= xprt_unregister_transport(&xprt_rdma
);
716 dprintk("RPC: %s: xprt_unregister returned %i\n",
720 static int __init
xprt_rdma_init(void)
724 rc
= xprt_register_transport(&xprt_rdma
);
729 dprintk("RPCRDMA Module Init, register RPC RDMA transport\n");
731 dprintk("Defaults:\n");
732 dprintk("\tSlots %d\n"
733 "\tMaxInlineRead %d\n\tMaxInlineWrite %d\n",
734 xprt_rdma_slot_table_entries
,
735 xprt_rdma_max_inline_read
, xprt_rdma_max_inline_write
);
736 dprintk("\tPadding %d\n\tMemreg %d\n",
737 xprt_rdma_inline_write_padding
, xprt_rdma_memreg_strategy
);
740 if (!sunrpc_table_header
)
741 sunrpc_table_header
= register_sysctl_table(sunrpc_table
);
746 module_init(xprt_rdma_init
);
747 module_exit(xprt_rdma_cleanup
);