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)
37 ptl_process_id_t remote_id;
41 char str[PTL_NALFMT_SIZE];
44 LASSERT (portal != 0);
45 LASSERT (conn != NULL);
46 CDEBUG (D_INFO, "conn=%p ni %s nid "LPX64" (%s) on %s\n",
47 conn, conn->c_peer.peer_ni->pni_name,
48 conn->c_peer.peer_nid,
49 portals_nid2str(conn->c_peer.peer_ni->pni_number,
50 conn->c_peer.peer_nid, str),
51 conn->c_peer.peer_ni->pni_name);
53 remote_id.nid = conn->c_peer.peer_nid,
58 md.threshold = (ack == PTL_ACK_REQ) ? 2 : 1;
59 md.options = PTLRPC_MD_OPTIONS;
61 md.eventq = conn->c_peer.peer_ni->pni_eq_h;
63 if (ack == PTL_ACK_REQ &&
64 OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_ACK | OBD_FAIL_ONCE)) {
65 /* don't ask for the ack to simulate failing client */
67 obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED;
70 rc = PtlMDBind (conn->c_peer.peer_ni->pni_ni_h, md,
73 CERROR ("PtlMDBind failed: %d\n", rc);
74 LASSERT (rc == PTL_NO_SPACE);
78 CDEBUG(D_NET, "Sending %d bytes to portal %d, xid "LPD64"\n",
81 rc2 = PtlPut (*mdh, ack, remote_id, portal, 0, xid, 0, 0);
83 /* We're going to get an UNLINK event when I unlink below,
84 * which will complete just like any other failed send, so
85 * I fall through and return success here! */
86 CERROR("PtlPut("LPU64", %d, "LPD64") failed: %d\n",
87 remote_id.nid, portal, xid, rc);
88 rc2 = PtlMDUnlink(*mdh);
89 LASSERT (rc2 == PTL_OK);
95 int ptlrpc_start_bulk_transfer (struct ptlrpc_bulk_desc *desc)
99 struct ptlrpc_peer *peer;
100 ptl_process_id_t remote_id;
105 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_BULK_PUT_NET))
108 /* NB no locking required until desc is on the network */
109 LASSERT (!desc->bd_network_rw);
110 LASSERT (desc->bd_type == BULK_PUT_SOURCE ||
111 desc->bd_type == BULK_GET_SINK);
112 desc->bd_success = 0;
113 peer = &desc->bd_export->exp_connection->c_peer;
115 md.user_ptr = &desc->bd_cbid;
116 md.eventq = peer->peer_ni->pni_eq_h;
117 md.threshold = 2; /* SENT and ACK/REPLY */
118 md.options = PTLRPC_MD_OPTIONS;
119 ptlrpc_fill_bulk_md(&md, desc);
121 LASSERT (desc->bd_cbid.cbid_fn == server_bulk_callback);
122 LASSERT (desc->bd_cbid.cbid_arg == desc);
124 /* NB total length may be 0 for a read past EOF, so we send a 0
125 * length bulk, since the client expects a bulk event. */
127 rc = PtlMDBind(peer->peer_ni->pni_ni_h, md,
128 PTL_UNLINK, &desc->bd_md_h);
130 CERROR("PtlMDBind failed: %d\n", rc);
131 LASSERT (rc == PTL_NO_SPACE);
135 /* Client's bulk and reply matchbits are the same */
136 xid = desc->bd_req->rq_xid;
137 remote_id.nid = peer->peer_nid;
140 CDEBUG(D_NET, "Transferring %u pages %u bytes via portal %d on %s "
141 "nid "LPX64" pid %d xid "LPX64"\n", desc->bd_iov_count,
142 desc->bd_nob, desc->bd_portal, peer->peer_ni->pni_name,
143 remote_id.nid, remote_id.pid, xid);
145 /* Network is about to get at the memory */
146 desc->bd_network_rw = 1;
148 if (desc->bd_type == BULK_PUT_SOURCE)
149 rc = PtlPut (desc->bd_md_h, PTL_ACK_REQ, remote_id,
150 desc->bd_portal, 0, xid, 0, 0);
152 rc = PtlGet (desc->bd_md_h, remote_id,
153 desc->bd_portal, 0, xid, 0);
156 /* Can't send, so we unlink the MD bound above. The UNLINK
157 * event this creates will signal completion with failure,
158 * so we return SUCCESS here! */
159 CERROR("Transfer("LPU64", %d, "LPX64") failed: %d\n",
160 remote_id.nid, desc->bd_portal, xid, rc);
161 rc2 = PtlMDUnlink(desc->bd_md_h);
162 LASSERT (rc2 == PTL_OK);
168 void ptlrpc_abort_bulk (struct ptlrpc_bulk_desc *desc)
170 /* Server side bulk abort. Idempotent. Not thread-safe (i.e. only
171 * serialises with completion callback) */
172 struct l_wait_info lwi;
175 LASSERT (!in_interrupt ()); /* might sleep */
177 if (!ptlrpc_bulk_active(desc)) /* completed or */
178 return; /* never started */
180 /* The unlink ensures the callback happens ASAP and is the last
181 * one. If it fails, it must be because completion just happened,
182 * but we must still l_wait_event() in this case, to give liblustre
183 * a chance to run server_bulk_callback()*/
185 PtlMDUnlink (desc->bd_md_h);
188 /* Network access will complete in finite time but the HUGE
189 * timeout lets us CWARN for visibility of sluggish NALs */
190 lwi = LWI_TIMEOUT (300 * HZ, NULL, NULL);
191 rc = l_wait_event(desc->bd_waitq,
192 !ptlrpc_bulk_active(desc), &lwi);
196 LASSERT(rc == -ETIMEDOUT);
197 CWARN("Unexpectedly long timeout: desc %p\n", desc);
201 int ptlrpc_register_bulk (struct ptlrpc_request *req)
203 struct ptlrpc_bulk_desc *desc = req->rq_bulk;
204 struct ptlrpc_peer *peer;
207 ptl_process_id_t source_id;
208 ptl_handle_me_t me_h;
212 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_BULK_GET_NET))
215 /* NB no locking required until desc is on the network */
216 LASSERT (desc->bd_nob > 0);
217 LASSERT (!desc->bd_network_rw);
218 LASSERT (desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
219 LASSERT (desc->bd_req != NULL);
220 LASSERT (desc->bd_type == BULK_PUT_SINK ||
221 desc->bd_type == BULK_GET_SOURCE);
223 desc->bd_success = 0;
225 peer = &desc->bd_import->imp_connection->c_peer;
227 md.user_ptr = &desc->bd_cbid;
228 md.eventq = peer->peer_ni->pni_eq_h;
229 md.threshold = 1; /* PUT or GET */
230 md.options = PTLRPC_MD_OPTIONS |
231 ((desc->bd_type == BULK_GET_SOURCE) ?
232 PTL_MD_OP_GET : PTL_MD_OP_PUT);
233 ptlrpc_fill_bulk_md(&md, desc);
235 LASSERT (desc->bd_cbid.cbid_fn == client_bulk_callback);
236 LASSERT (desc->bd_cbid.cbid_arg == desc);
238 /* XXX Registering the same xid on retried bulk makes my head
239 * explode trying to understand how the original request's bulk
240 * might interfere with the retried request -eeb */
241 LASSERT (!desc->bd_registered || req->rq_xid != desc->bd_last_xid);
242 desc->bd_registered = 1;
243 desc->bd_last_xid = req->rq_xid;
245 source_id.nid = desc->bd_import->imp_connection->c_peer.peer_nid;
246 source_id.pid = PTL_PID_ANY;
248 rc = PtlMEAttach(peer->peer_ni->pni_ni_h,
249 desc->bd_portal, source_id, req->rq_xid, 0,
250 PTL_UNLINK, PTL_INS_AFTER, &me_h);
252 CERROR("PtlMEAttach failed: %d\n", rc);
253 LASSERT (rc == PTL_NO_SPACE);
257 /* About to let the network at it... */
258 desc->bd_network_rw = 1;
259 rc = PtlMDAttach(me_h, md, PTL_UNLINK, &desc->bd_md_h);
261 CERROR("PtlMDAttach failed: %d\n", rc);
262 LASSERT (rc == PTL_NO_SPACE);
263 desc->bd_network_rw = 0;
264 rc2 = PtlMEUnlink (me_h);
265 LASSERT (rc2 == PTL_OK);
269 CDEBUG(D_NET, "Setup bulk %s buffers: %u pages %u bytes, xid "LPX64", "
271 desc->bd_type == BULK_GET_SOURCE ? "get-source" : "put-sink",
272 desc->bd_iov_count, desc->bd_nob,
273 req->rq_xid, desc->bd_portal, peer->peer_ni->pni_name);
277 void ptlrpc_unregister_bulk (struct ptlrpc_request *req)
279 /* Disconnect a bulk desc from the network. Idempotent. Not
280 * thread-safe (i.e. only interlocks with completion callback). */
281 struct ptlrpc_bulk_desc *desc = req->rq_bulk;
282 wait_queue_head_t *wq;
283 struct l_wait_info lwi;
286 LASSERT (!in_interrupt ()); /* might sleep */
288 if (!ptlrpc_bulk_active(desc)) /* completed or */
289 return; /* never registered */
291 LASSERT (desc->bd_req == req); /* bd_req NULL until registered */
293 /* the unlink ensures the callback happens ASAP and is the last
294 * one. If it fails, it must be because completion just happened,
295 * but we must still l_wait_event() in this case to give liblustre
296 * a chance to run client_bulk_callback() */
298 PtlMDUnlink (desc->bd_md_h);
300 if (desc->bd_req->rq_set != NULL)
301 wq = &req->rq_set->set_waitq;
303 wq = &req->rq_reply_waitq;
306 /* Network access will complete in finite time but the HUGE
307 * timeout lets us CWARN for visibility of sluggish NALs */
308 lwi = LWI_TIMEOUT (300 * HZ, NULL, NULL);
309 rc = l_wait_event(*wq, !ptlrpc_bulk_active(desc), &lwi);
313 LASSERT (rc == -ETIMEDOUT);
314 CWARN("Unexpectedly long timeout: desc %p\n", desc);
318 int ptlrpc_send_reply (struct ptlrpc_request *req, int may_be_difficult)
320 struct ptlrpc_service *svc = req->rq_rqbd->rqbd_srv_ni->sni_service;
321 struct ptlrpc_reply_state *rs = req->rq_reply_state;
322 struct ptlrpc_connection *conn;
325 /* We must already have a reply buffer (only ptlrpc_error() may be
326 * called without one). We must also have a request buffer which
327 * is either the actual (swabbed) incoming request, or a saved copy
328 * if this is a req saved in target_queue_final_reply(). */
329 LASSERT (req->rq_reqmsg != NULL);
330 LASSERT (rs != NULL);
331 LASSERT (req->rq_repmsg != NULL);
332 LASSERT (may_be_difficult || !rs->rs_difficult);
333 LASSERT (req->rq_repmsg == &rs->rs_msg);
334 LASSERT (rs->rs_cb_id.cbid_fn == reply_out_callback);
335 LASSERT (rs->rs_cb_id.cbid_arg == rs);
337 LASSERT (req->rq_repmsg != NULL);
338 if (req->rq_type != PTL_RPC_MSG_ERR)
339 req->rq_type = PTL_RPC_MSG_REPLY;
341 req->rq_repmsg->type = req->rq_type;
342 req->rq_repmsg->status = req->rq_status;
343 req->rq_repmsg->opc = req->rq_reqmsg->opc;
345 if (req->rq_export == NULL)
346 conn = ptlrpc_get_connection(&req->rq_peer, NULL);
348 conn = ptlrpc_connection_addref(req->rq_export->exp_connection);
350 atomic_inc (&svc->srv_outstanding_replies);
352 rc = ptl_send_buf (&rs->rs_md_h, req->rq_repmsg, req->rq_replen,
353 rs->rs_difficult ? PTL_ACK_REQ : PTL_NOACK_REQ,
355 svc->srv_rep_portal, req->rq_xid);
357 atomic_dec (&svc->srv_outstanding_replies);
359 if (!rs->rs_difficult) {
360 /* Callers other than target_send_reply() expect me
361 * to clean up on a comms error */
362 lustre_free_reply_state (rs);
363 req->rq_reply_state = NULL;
364 req->rq_repmsg = NULL;
367 ptlrpc_put_connection(conn);
371 int ptlrpc_reply (struct ptlrpc_request *req)
373 return (ptlrpc_send_reply (req, 0));
376 int ptlrpc_error(struct ptlrpc_request *req)
381 if (!req->rq_repmsg) {
382 rc = lustre_pack_reply(req, 0, NULL, NULL);
387 req->rq_type = PTL_RPC_MSG_ERR;
389 rc = ptlrpc_send_reply (req, 0);
393 int ptl_send_rpc(struct ptlrpc_request *request)
397 struct ptlrpc_connection *connection;
399 ptl_process_id_t source_id;
400 ptl_handle_me_t reply_me_h;
404 LASSERT (request->rq_type == PTL_RPC_MSG_REQUEST);
406 /* If this is a re-transmit, we're required to have disengaged
407 * cleanly from the previous attempt */
408 LASSERT (!request->rq_receiving_reply);
410 connection = request->rq_import->imp_connection;
412 if (request->rq_bulk != NULL) {
413 rc = ptlrpc_register_bulk (request);
418 request->rq_reqmsg->handle = request->rq_import->imp_remote_handle;
419 request->rq_reqmsg->type = PTL_RPC_MSG_REQUEST;
420 request->rq_reqmsg->conn_cnt = request->rq_import->imp_conn_cnt;
422 source_id.nid = connection->c_peer.peer_nid;
423 source_id.pid = PTL_PID_ANY;
425 LASSERT (request->rq_replen != 0);
426 if (request->rq_repmsg == NULL)
427 OBD_ALLOC(request->rq_repmsg, request->rq_replen);
428 if (request->rq_repmsg == NULL)
429 GOTO(cleanup_bulk, rc = -ENOMEM);
431 rc = PtlMEAttach(connection->c_peer.peer_ni->pni_ni_h,
432 request->rq_reply_portal, /* XXX FIXME bug 249 */
433 source_id, request->rq_xid, 0, PTL_UNLINK,
434 PTL_INS_AFTER, &reply_me_h);
436 CERROR("PtlMEAttach failed: %d\n", rc);
437 LASSERT (rc == PTL_NO_SPACE);
438 GOTO(cleanup_repmsg, rc = -ENOMEM);
441 spin_lock_irqsave (&request->rq_lock, flags);
442 /* If the MD attach succeeds, there _will_ be a reply_in callback */
443 request->rq_receiving_reply = 1;
444 /* Clear any flags that may be present from previous sends. */
445 request->rq_replied = 0;
447 request->rq_timedout = 0;
448 request->rq_resend = 0;
449 request->rq_restart = 0;
450 spin_unlock_irqrestore (&request->rq_lock, flags);
452 reply_md.start = request->rq_repmsg;
453 reply_md.length = request->rq_replen;
454 reply_md.threshold = 1;
455 reply_md.options = PTLRPC_MD_OPTIONS | PTL_MD_OP_PUT;
456 reply_md.user_ptr = &request->rq_reply_cbid;
457 reply_md.eventq = connection->c_peer.peer_ni->pni_eq_h;
459 rc = PtlMDAttach(reply_me_h, reply_md, PTL_UNLINK,
460 &request->rq_reply_md_h);
462 CERROR("PtlMDAttach failed: %d\n", rc);
463 LASSERT (rc == PTL_NO_SPACE);
464 GOTO(cleanup_me, rc -ENOMEM);
467 CDEBUG(D_NET, "Setup reply buffer: %u bytes, xid "LPU64
468 ", portal %u on %s\n",
469 request->rq_replen, request->rq_xid,
470 request->rq_reply_portal,
471 connection->c_peer.peer_ni->pni_name);
473 ptlrpc_request_addref(request); /* +1 ref for the SENT callback */
475 request->rq_sent = LTIME_S(CURRENT_TIME);
476 ptlrpc_pinger_sending_on_import(request->rq_import);
477 rc = ptl_send_buf(&request->rq_req_md_h,
478 request->rq_reqmsg, request->rq_reqlen,
479 PTL_NOACK_REQ, &request->rq_req_cbid,
481 request->rq_request_portal,
484 ptlrpc_lprocfs_rpc_sent(request);
488 ptlrpc_req_finished (request); /* drop callback ref */
491 /* MEUnlink is safe; the PUT didn't even get off the ground, and
492 * nobody apart from the PUT's target has the right nid+XID to
493 * access the reply buffer. */
494 rc2 = PtlMEUnlink(reply_me_h);
495 LASSERT (rc2 == PTL_OK);
496 /* UNLINKED callback called synchronously */
497 LASSERT (!request->rq_receiving_reply);
500 OBD_FREE(request->rq_repmsg, request->rq_replen);
501 request->rq_repmsg = NULL;
504 if (request->rq_bulk != NULL)
505 ptlrpc_unregister_bulk(request);
510 int ptlrpc_register_rqbd (struct ptlrpc_request_buffer_desc *rqbd)
512 struct ptlrpc_srv_ni *srv_ni = rqbd->rqbd_srv_ni;
513 struct ptlrpc_service *service = srv_ni->sni_service;
514 static ptl_process_id_t match_id = {PTL_NID_ANY, PTL_PID_ANY};
517 ptl_handle_me_t me_h;
519 CDEBUG(D_NET, "PtlMEAttach: portal %d on %s\n",
520 service->srv_req_portal, srv_ni->sni_ni->pni_name);
522 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_RQBD))
525 rc = PtlMEAttach(srv_ni->sni_ni->pni_ni_h, service->srv_req_portal,
526 match_id, 0, ~0, PTL_UNLINK, PTL_INS_AFTER, &me_h);
528 CERROR("PtlMEAttach failed: %d\n", rc);
532 LASSERT(rqbd->rqbd_refcount == 0);
533 rqbd->rqbd_refcount = 1;
535 md.start = rqbd->rqbd_buffer;
536 md.length = service->srv_buf_size;
537 md.max_size = service->srv_max_req_size;
538 md.threshold = PTL_MD_THRESH_INF;
539 md.options = PTLRPC_MD_OPTIONS | PTL_MD_OP_PUT | PTL_MD_MAX_SIZE;
540 md.user_ptr = &rqbd->rqbd_cbid;
541 md.eventq = srv_ni->sni_ni->pni_eq_h;
543 rc = PtlMDAttach(me_h, md, PTL_UNLINK, &rqbd->rqbd_md_h);
547 CERROR("PtlMDAttach failed: %d; \n", rc);
548 LASSERT (rc == PTL_NO_SPACE);
549 rc = PtlMEUnlink (me_h);
550 LASSERT (rc == PTL_OK);
551 rqbd->rqbd_refcount = 0;