1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #define DEBUG_SUBSYSTEM S_RPC
25 #include <liblustre.h>
27 #include <linux/obd_support.h>
28 #include <linux/lustre_net.h>
29 #include <linux/lustre_lib.h>
30 #include <linux/obd.h>
31 #include "ptlrpc_internal.h"
33 static int ptl_send_buf (ptl_handle_md_t *mdh, void *base, int len,
34 ptl_ack_req_t ack, struct ptlrpc_cb_id *cbid,
35 struct ptlrpc_connection *conn, int portal, __u64 xid)
39 char str[PTL_NALFMT_SIZE];
42 LASSERT (portal != 0);
43 LASSERT (conn != NULL);
44 CDEBUG (D_INFO, "conn=%p ni %s id %s on %s\n",
45 conn, conn->c_peer.peer_ni->pni_name,
46 ptlrpc_id2str(&conn->c_peer, str),
47 conn->c_peer.peer_ni->pni_name);
50 md.threshold = (ack == PTL_ACK_REQ) ? 2 : 1;
51 md.options = PTLRPC_MD_OPTIONS;
53 md.eq_handle = conn->c_peer.peer_ni->pni_eq_h;
55 if (ack == PTL_ACK_REQ &&
56 OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_ACK | OBD_FAIL_ONCE)) {
57 /* don't ask for the ack to simulate failing client */
59 obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED;
62 rc = PtlMDBind (conn->c_peer.peer_ni->pni_ni_h, md,
65 CERROR ("PtlMDBind failed: %d\n", rc);
66 LASSERT (rc == PTL_NO_SPACE);
70 CDEBUG(D_NET, "Sending %d bytes to portal %d, xid "LPD64"\n",
73 rc = PtlPut (*mdh, ack, conn->c_peer.peer_id, portal, 0, xid, 0, 0);
76 /* We're going to get an UNLINK event when I unlink below,
77 * which will complete just like any other failed send, so
78 * I fall through and return success here! */
79 CERROR("PtlPut(%s, %d, "LPD64") failed: %d\n",
80 ptlrpc_id2str(&conn->c_peer, str),
82 rc2 = PtlMDUnlink(*mdh);
83 LASSERTF(rc2 == PTL_OK, "rc2 = %d\n", rc2);
89 int ptlrpc_start_bulk_transfer (struct ptlrpc_bulk_desc *desc)
93 struct ptlrpc_peer *peer;
96 char str[PTL_NALFMT_SIZE];
99 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_BULK_PUT_NET))
102 /* NB no locking required until desc is on the network */
103 LASSERT (!desc->bd_network_rw);
104 LASSERT (desc->bd_type == BULK_PUT_SOURCE ||
105 desc->bd_type == BULK_GET_SINK);
106 desc->bd_success = 0;
107 peer = &desc->bd_export->exp_connection->c_peer;
109 md.user_ptr = &desc->bd_cbid;
110 md.eq_handle = peer->peer_ni->pni_eq_h;
111 md.threshold = 2; /* SENT and ACK/REPLY */
112 md.options = PTLRPC_MD_OPTIONS;
113 ptlrpc_fill_bulk_md(&md, desc);
115 LASSERT (desc->bd_cbid.cbid_fn == server_bulk_callback);
116 LASSERT (desc->bd_cbid.cbid_arg == desc);
118 /* NB total length may be 0 for a read past EOF, so we send a 0
119 * length bulk, since the client expects a bulk event. */
121 rc = PtlMDBind(peer->peer_ni->pni_ni_h, md,
122 PTL_UNLINK, &desc->bd_md_h);
124 CERROR("PtlMDBind failed: %d\n", rc);
125 LASSERT (rc == PTL_NO_SPACE);
129 /* Client's bulk and reply matchbits are the same */
130 xid = desc->bd_req->rq_xid;
131 CDEBUG(D_NET, "Transferring %u pages %u bytes via portal %d on %s "
132 "nid %s pid %d xid "LPX64"\n", desc->bd_iov_count,
133 desc->bd_nob, desc->bd_portal, peer->peer_ni->pni_name,
134 ptlrpc_id2str(peer, str), peer->peer_id.pid, xid);
136 /* Network is about to get at the memory */
137 desc->bd_network_rw = 1;
139 if (desc->bd_type == BULK_PUT_SOURCE)
140 rc = PtlPut (desc->bd_md_h, PTL_ACK_REQ, peer->peer_id,
141 desc->bd_portal, 0, xid, 0, 0);
143 rc = PtlGet (desc->bd_md_h, peer->peer_id,
144 desc->bd_portal, 0, xid, 0);
147 /* Can't send, so we unlink the MD bound above. The UNLINK
148 * event this creates will signal completion with failure,
149 * so we return SUCCESS here! */
150 CERROR("Transfer(%s, %d, "LPX64") failed: %d\n",
151 ptlrpc_id2str(peer, str),
152 desc->bd_portal, xid, rc);
153 rc2 = PtlMDUnlink(desc->bd_md_h);
154 LASSERT (rc2 == PTL_OK);
160 void ptlrpc_abort_bulk (struct ptlrpc_bulk_desc *desc)
162 /* Server side bulk abort. Idempotent. Not thread-safe (i.e. only
163 * serialises with completion callback) */
164 struct l_wait_info lwi;
167 LASSERT (!in_interrupt ()); /* might sleep */
169 if (!ptlrpc_bulk_active(desc)) /* completed or */
170 return; /* never started */
172 /* The unlink ensures the callback happens ASAP and is the last
173 * one. If it fails, it must be because completion just happened,
174 * but we must still l_wait_event() in this case, to give liblustre
175 * a chance to run server_bulk_callback()*/
177 PtlMDUnlink (desc->bd_md_h);
180 /* Network access will complete in finite time but the HUGE
181 * timeout lets us CWARN for visibility of sluggish NALs */
182 lwi = LWI_TIMEOUT (300 * HZ, NULL, NULL);
183 rc = l_wait_event(desc->bd_waitq,
184 !ptlrpc_bulk_active(desc), &lwi);
188 LASSERT(rc == -ETIMEDOUT);
189 CWARN("Unexpectedly long timeout: desc %p\n", desc);
193 int ptlrpc_register_bulk (struct ptlrpc_request *req)
195 struct ptlrpc_bulk_desc *desc = req->rq_bulk;
196 struct ptlrpc_peer *peer;
199 ptl_handle_me_t me_h;
203 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_BULK_GET_NET))
206 /* NB no locking required until desc is on the network */
207 LASSERT (desc->bd_nob > 0);
208 LASSERT (!desc->bd_network_rw);
209 LASSERT (desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
210 LASSERT (desc->bd_req != NULL);
211 LASSERT (desc->bd_type == BULK_PUT_SINK ||
212 desc->bd_type == BULK_GET_SOURCE);
214 desc->bd_success = 0;
216 peer = &desc->bd_import->imp_connection->c_peer;
218 md.user_ptr = &desc->bd_cbid;
219 md.eq_handle = peer->peer_ni->pni_eq_h;
220 md.threshold = 1; /* PUT or GET */
221 md.options = PTLRPC_MD_OPTIONS |
222 ((desc->bd_type == BULK_GET_SOURCE) ?
223 PTL_MD_OP_GET : PTL_MD_OP_PUT);
224 ptlrpc_fill_bulk_md(&md, desc);
226 LASSERT (desc->bd_cbid.cbid_fn == client_bulk_callback);
227 LASSERT (desc->bd_cbid.cbid_arg == desc);
229 /* XXX Registering the same xid on retried bulk makes my head
230 * explode trying to understand how the original request's bulk
231 * might interfere with the retried request -eeb */
232 LASSERT (!desc->bd_registered || req->rq_xid != desc->bd_last_xid);
233 desc->bd_registered = 1;
234 desc->bd_last_xid = req->rq_xid;
236 rc = PtlMEAttach(peer->peer_ni->pni_ni_h,
237 desc->bd_portal, desc->bd_import->imp_connection->c_peer.peer_id,
238 req->rq_xid, 0, PTL_UNLINK, PTL_INS_AFTER, &me_h);
240 CERROR("PtlMEAttach failed: %d\n", rc);
241 LASSERT (rc == PTL_NO_SPACE);
245 /* About to let the network at it... */
246 desc->bd_network_rw = 1;
247 rc = PtlMDAttach(me_h, md, PTL_UNLINK, &desc->bd_md_h);
249 CERROR("PtlMDAttach failed: %d\n", rc);
250 LASSERT (rc == PTL_NO_SPACE);
251 desc->bd_network_rw = 0;
252 rc2 = PtlMEUnlink (me_h);
253 LASSERT (rc2 == PTL_OK);
257 CDEBUG(D_NET, "Setup bulk %s buffers: %u pages %u bytes, xid "LPX64", "
259 desc->bd_type == BULK_GET_SOURCE ? "get-source" : "put-sink",
260 desc->bd_iov_count, desc->bd_nob,
261 req->rq_xid, desc->bd_portal, peer->peer_ni->pni_name);
265 void ptlrpc_unregister_bulk (struct ptlrpc_request *req)
267 /* Disconnect a bulk desc from the network. Idempotent. Not
268 * thread-safe (i.e. only interlocks with completion callback). */
269 struct ptlrpc_bulk_desc *desc = req->rq_bulk;
270 wait_queue_head_t *wq;
271 struct l_wait_info lwi;
274 LASSERT (!in_interrupt ()); /* might sleep */
276 if (!ptlrpc_bulk_active(desc)) /* completed or */
277 return; /* never registered */
279 LASSERT (desc->bd_req == req); /* bd_req NULL until registered */
281 /* the unlink ensures the callback happens ASAP and is the last
282 * one. If it fails, it must be because completion just happened,
283 * but we must still l_wait_event() in this case to give liblustre
284 * a chance to run client_bulk_callback() */
286 PtlMDUnlink (desc->bd_md_h);
288 if (req->rq_set != NULL)
289 wq = &req->rq_set->set_waitq;
291 wq = &req->rq_reply_waitq;
294 /* Network access will complete in finite time but the HUGE
295 * timeout lets us CWARN for visibility of sluggish NALs */
296 lwi = LWI_TIMEOUT (300 * HZ, NULL, NULL);
297 rc = l_wait_event(*wq, !ptlrpc_bulk_active(desc), &lwi);
301 LASSERT (rc == -ETIMEDOUT);
302 CWARN("Unexpectedly long timeout: desc %p\n", desc);
306 int ptlrpc_send_reply (struct ptlrpc_request *req, int may_be_difficult)
308 struct ptlrpc_service *svc = req->rq_rqbd->rqbd_srv_ni->sni_service;
309 struct ptlrpc_reply_state *rs = req->rq_reply_state;
310 struct ptlrpc_connection *conn;
313 /* We must already have a reply buffer (only ptlrpc_error() may be
314 * called without one). We must also have a request buffer which
315 * is either the actual (swabbed) incoming request, or a saved copy
316 * if this is a req saved in target_queue_final_reply(). */
317 LASSERT (req->rq_reqmsg != NULL);
318 LASSERT (rs != NULL);
319 LASSERT (req->rq_repmsg != NULL);
320 LASSERT (may_be_difficult || !rs->rs_difficult);
321 LASSERT (req->rq_repmsg == &rs->rs_msg);
322 LASSERT (rs->rs_cb_id.cbid_fn == reply_out_callback);
323 LASSERT (rs->rs_cb_id.cbid_arg == rs);
325 LASSERT (req->rq_repmsg != NULL);
326 if (req->rq_type != PTL_RPC_MSG_ERR)
327 req->rq_type = PTL_RPC_MSG_REPLY;
329 req->rq_repmsg->type = req->rq_type;
330 req->rq_repmsg->status = req->rq_status;
331 req->rq_repmsg->opc = req->rq_reqmsg->opc;
333 if (req->rq_export == NULL)
334 conn = ptlrpc_get_connection(&req->rq_peer, NULL);
336 conn = ptlrpc_connection_addref(req->rq_export->exp_connection);
338 atomic_inc (&svc->srv_outstanding_replies);
340 rc = ptl_send_buf (&rs->rs_md_h, req->rq_repmsg, req->rq_replen,
341 rs->rs_difficult ? PTL_ACK_REQ : PTL_NOACK_REQ,
343 svc->srv_rep_portal, req->rq_xid);
345 atomic_dec (&svc->srv_outstanding_replies);
347 if (!rs->rs_difficult) {
348 /* Callers other than target_send_reply() expect me
349 * to clean up on a comms error */
350 lustre_free_reply_state (rs);
351 req->rq_reply_state = NULL;
352 req->rq_repmsg = NULL;
355 ptlrpc_put_connection(conn);
359 int ptlrpc_reply (struct ptlrpc_request *req)
361 return (ptlrpc_send_reply (req, 0));
364 int ptlrpc_error(struct ptlrpc_request *req)
369 if (!req->rq_repmsg) {
370 rc = lustre_pack_reply(req, 0, NULL, NULL);
375 req->rq_type = PTL_RPC_MSG_ERR;
377 rc = ptlrpc_send_reply (req, 0);
381 int ptl_send_rpc(struct ptlrpc_request *request)
385 struct ptlrpc_connection *connection;
387 ptl_handle_me_t reply_me_h;
391 LASSERT (request->rq_type == PTL_RPC_MSG_REQUEST);
393 /* If this is a re-transmit, we're required to have disengaged
394 * cleanly from the previous attempt */
395 LASSERT (!request->rq_receiving_reply);
397 connection = request->rq_import->imp_connection;
399 if (request->rq_bulk != NULL) {
400 rc = ptlrpc_register_bulk (request);
405 request->rq_reqmsg->handle = request->rq_import->imp_remote_handle;
406 request->rq_reqmsg->type = PTL_RPC_MSG_REQUEST;
407 request->rq_reqmsg->conn_cnt = request->rq_import->imp_conn_cnt;
409 LASSERT (request->rq_replen != 0);
410 if (request->rq_repmsg == NULL)
411 OBD_ALLOC(request->rq_repmsg, request->rq_replen);
412 if (request->rq_repmsg == NULL)
413 GOTO(cleanup_bulk, rc = -ENOMEM);
415 rc = PtlMEAttach(connection->c_peer.peer_ni->pni_ni_h,
416 request->rq_reply_portal, /* XXX FIXME bug 249 */
417 connection->c_peer.peer_id, request->rq_xid, 0, PTL_UNLINK,
418 PTL_INS_AFTER, &reply_me_h);
420 CERROR("PtlMEAttach failed: %d\n", rc);
421 LASSERT (rc == PTL_NO_SPACE);
422 GOTO(cleanup_repmsg, rc = -ENOMEM);
425 spin_lock_irqsave (&request->rq_lock, flags);
426 /* If the MD attach succeeds, there _will_ be a reply_in callback */
427 request->rq_receiving_reply = 1;
428 /* Clear any flags that may be present from previous sends. */
429 request->rq_replied = 0;
431 request->rq_timedout = 0;
432 request->rq_net_err = 0;
433 request->rq_resend = 0;
434 request->rq_restart = 0;
435 spin_unlock_irqrestore (&request->rq_lock, flags);
437 reply_md.start = request->rq_repmsg;
438 reply_md.length = request->rq_replen;
439 reply_md.threshold = 1;
440 reply_md.options = PTLRPC_MD_OPTIONS | PTL_MD_OP_PUT;
441 reply_md.user_ptr = &request->rq_reply_cbid;
442 reply_md.eq_handle = connection->c_peer.peer_ni->pni_eq_h;
444 rc = PtlMDAttach(reply_me_h, reply_md, PTL_UNLINK,
445 &request->rq_reply_md_h);
447 CERROR("PtlMDAttach failed: %d\n", rc);
448 LASSERT (rc == PTL_NO_SPACE);
449 GOTO(cleanup_me, rc -ENOMEM);
452 CDEBUG(D_NET, "Setup reply buffer: %u bytes, xid "LPU64
453 ", portal %u on %s\n",
454 request->rq_replen, request->rq_xid,
455 request->rq_reply_portal,
456 connection->c_peer.peer_ni->pni_name);
458 ptlrpc_request_addref(request); /* +1 ref for the SENT callback */
460 request->rq_sent = LTIME_S(CURRENT_TIME);
461 ptlrpc_pinger_sending_on_import(request->rq_import);
462 rc = ptl_send_buf(&request->rq_req_md_h,
463 request->rq_reqmsg, request->rq_reqlen,
464 PTL_NOACK_REQ, &request->rq_req_cbid,
466 request->rq_request_portal,
469 ptlrpc_lprocfs_rpc_sent(request);
473 ptlrpc_req_finished (request); /* drop callback ref */
476 /* MEUnlink is safe; the PUT didn't even get off the ground, and
477 * nobody apart from the PUT's target has the right nid+XID to
478 * access the reply buffer. */
479 rc2 = PtlMEUnlink(reply_me_h);
480 LASSERT (rc2 == PTL_OK);
481 /* UNLINKED callback called synchronously */
482 LASSERT (!request->rq_receiving_reply);
485 OBD_FREE(request->rq_repmsg, request->rq_replen);
486 request->rq_repmsg = NULL;
489 if (request->rq_bulk != NULL)
490 ptlrpc_unregister_bulk(request);
495 int ptlrpc_register_rqbd (struct ptlrpc_request_buffer_desc *rqbd)
497 struct ptlrpc_srv_ni *srv_ni = rqbd->rqbd_srv_ni;
498 struct ptlrpc_service *service = srv_ni->sni_service;
499 static ptl_process_id_t match_id = {PTL_NID_ANY, PTL_PID_ANY};
502 ptl_handle_me_t me_h;
504 CDEBUG(D_NET, "PtlMEAttach: portal %d on %s\n",
505 service->srv_req_portal, srv_ni->sni_ni->pni_name);
507 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_RQBD))
510 rc = PtlMEAttach(srv_ni->sni_ni->pni_ni_h, service->srv_req_portal,
511 match_id, 0, ~0, PTL_UNLINK, PTL_INS_AFTER, &me_h);
513 CERROR("PtlMEAttach failed: %d\n", rc);
517 LASSERT(rqbd->rqbd_refcount == 0);
518 rqbd->rqbd_refcount = 1;
520 md.start = rqbd->rqbd_buffer;
521 md.length = service->srv_buf_size;
522 md.max_size = service->srv_max_req_size;
523 md.threshold = PTL_MD_THRESH_INF;
524 md.options = PTLRPC_MD_OPTIONS | PTL_MD_OP_PUT | PTL_MD_MAX_SIZE;
525 md.user_ptr = &rqbd->rqbd_cbid;
526 md.eq_handle = srv_ni->sni_ni->pni_eq_h;
528 rc = PtlMDAttach(me_h, md, PTL_UNLINK, &rqbd->rqbd_md_h);
532 CERROR("PtlMDAttach failed: %d; \n", rc);
533 LASSERT (rc == PTL_NO_SPACE);
534 rc = PtlMEUnlink (me_h);
535 LASSERT (rc == PTL_OK);
536 rqbd->rqbd_refcount = 0;