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 %s on %s\n",
47 conn, conn->c_peer.peer_ni->pni_name,
48 ptlrpc_peernid2str(&conn->c_peer, str),
49 conn->c_peer.peer_ni->pni_name);
51 remote_id.nid = conn->c_peer.peer_nid,
56 md.threshold = (ack == PTL_ACK_REQ) ? 2 : 1;
57 md.options = PTLRPC_MD_OPTIONS;
59 md.eventq = conn->c_peer.peer_ni->pni_eq_h;
61 if (ack == PTL_ACK_REQ &&
62 OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_ACK | OBD_FAIL_ONCE)) {
63 /* don't ask for the ack to simulate failing client */
65 obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED;
68 rc = PtlMDBind (conn->c_peer.peer_ni->pni_ni_h, md,
71 CERROR ("PtlMDBind failed: %d\n", rc);
72 LASSERT (rc == PTL_NO_SPACE);
76 CDEBUG(D_NET, "Sending %d bytes to portal %d, xid "LPD64"\n",
79 rc2 = PtlPut (*mdh, ack, remote_id, portal, 0, xid, 0, 0);
81 /* We're going to get an UNLINK event when I unlink below,
82 * which will complete just like any other failed send, so
83 * I fall through and return success here! */
84 CERROR("PtlPut(%s, %d, "LPD64") failed: %d\n",
85 ptlrpc_peernid2str(&conn->c_peer, str),
87 rc2 = PtlMDUnlink(*mdh);
88 LASSERT (rc2 == PTL_OK);
94 int ptlrpc_start_bulk_transfer (struct ptlrpc_bulk_desc *desc)
98 struct ptlrpc_peer *peer;
99 ptl_process_id_t remote_id;
102 char str[PTL_NALFMT_SIZE];
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 %s pid %d xid "LPX64"\n", desc->bd_iov_count,
142 desc->bd_nob, desc->bd_portal, peer->peer_ni->pni_name,
143 ptlrpc_peernid2str(peer, str), 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(%s, %d, "LPX64") failed: %d\n",
160 ptlrpc_peernid2str(peer, str),
161 desc->bd_portal, xid, rc);
162 rc2 = PtlMDUnlink(desc->bd_md_h);
163 LASSERT (rc2 == PTL_OK);
169 void ptlrpc_abort_bulk (struct ptlrpc_bulk_desc *desc)
171 /* Server side bulk abort. Idempotent. Not thread-safe (i.e. only
172 * serialises with completion callback) */
173 struct l_wait_info lwi;
176 LASSERT (!in_interrupt ()); /* might sleep */
178 if (!ptlrpc_bulk_active(desc)) /* completed or */
179 return; /* never started */
181 /* The unlink ensures the callback happens ASAP and is the last
182 * one. If it fails, it must be because completion just happened,
183 * but we must still l_wait_event() in this case, to give liblustre
184 * a chance to run server_bulk_callback()*/
186 PtlMDUnlink (desc->bd_md_h);
189 /* Network access will complete in finite time but the HUGE
190 * timeout lets us CWARN for visibility of sluggish NALs */
191 lwi = LWI_TIMEOUT (300 * HZ, NULL, NULL);
192 rc = l_wait_event(desc->bd_waitq,
193 !ptlrpc_bulk_active(desc), &lwi);
197 LASSERT(rc == -ETIMEDOUT);
198 CWARN("Unexpectedly long timeout: desc %p\n", desc);
202 int ptlrpc_register_bulk (struct ptlrpc_request *req)
204 struct ptlrpc_bulk_desc *desc = req->rq_bulk;
205 struct ptlrpc_peer *peer;
208 ptl_process_id_t source_id;
209 ptl_handle_me_t me_h;
213 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_BULK_GET_NET))
216 /* NB no locking required until desc is on the network */
217 LASSERT (desc->bd_nob > 0);
218 LASSERT (!desc->bd_network_rw);
219 LASSERT (desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
220 LASSERT (desc->bd_req != NULL);
221 LASSERT (desc->bd_type == BULK_PUT_SINK ||
222 desc->bd_type == BULK_GET_SOURCE);
224 desc->bd_success = 0;
226 peer = &desc->bd_import->imp_connection->c_peer;
228 md.user_ptr = &desc->bd_cbid;
229 md.eventq = peer->peer_ni->pni_eq_h;
230 md.threshold = 1; /* PUT or GET */
231 md.options = PTLRPC_MD_OPTIONS |
232 ((desc->bd_type == BULK_GET_SOURCE) ?
233 PTL_MD_OP_GET : PTL_MD_OP_PUT);
234 ptlrpc_fill_bulk_md(&md, desc);
236 LASSERT (desc->bd_cbid.cbid_fn == client_bulk_callback);
237 LASSERT (desc->bd_cbid.cbid_arg == desc);
239 /* XXX Registering the same xid on retried bulk makes my head
240 * explode trying to understand how the original request's bulk
241 * might interfere with the retried request -eeb */
242 LASSERT (!desc->bd_registered || req->rq_xid != desc->bd_last_xid);
243 desc->bd_registered = 1;
244 desc->bd_last_xid = req->rq_xid;
246 source_id.nid = desc->bd_import->imp_connection->c_peer.peer_nid;
247 source_id.pid = PTL_PID_ANY;
249 rc = PtlMEAttach(peer->peer_ni->pni_ni_h,
250 desc->bd_portal, source_id, req->rq_xid, 0,
251 PTL_UNLINK, PTL_INS_AFTER, &me_h);
253 CERROR("PtlMEAttach failed: %d\n", rc);
254 LASSERT (rc == PTL_NO_SPACE);
258 /* About to let the network at it... */
259 desc->bd_network_rw = 1;
260 rc = PtlMDAttach(me_h, md, PTL_UNLINK, &desc->bd_md_h);
262 CERROR("PtlMDAttach failed: %d\n", rc);
263 LASSERT (rc == PTL_NO_SPACE);
264 desc->bd_network_rw = 0;
265 rc2 = PtlMEUnlink (me_h);
266 LASSERT (rc2 == PTL_OK);
270 CDEBUG(D_NET, "Setup bulk %s buffers: %u pages %u bytes, xid "LPX64", "
272 desc->bd_type == BULK_GET_SOURCE ? "get-source" : "put-sink",
273 desc->bd_iov_count, desc->bd_nob,
274 req->rq_xid, desc->bd_portal, peer->peer_ni->pni_name);
278 void ptlrpc_unregister_bulk (struct ptlrpc_request *req)
280 /* Disconnect a bulk desc from the network. Idempotent. Not
281 * thread-safe (i.e. only interlocks with completion callback). */
282 struct ptlrpc_bulk_desc *desc = req->rq_bulk;
283 wait_queue_head_t *wq;
284 struct l_wait_info lwi;
287 LASSERT (!in_interrupt ()); /* might sleep */
289 if (!ptlrpc_bulk_active(desc)) /* completed or */
290 return; /* never registered */
292 LASSERT (desc->bd_req == req); /* bd_req NULL until registered */
294 /* the unlink ensures the callback happens ASAP and is the last
295 * one. If it fails, it must be because completion just happened,
296 * but we must still l_wait_event() in this case to give liblustre
297 * a chance to run client_bulk_callback() */
299 PtlMDUnlink (desc->bd_md_h);
301 if (desc->bd_req->rq_set != NULL)
302 wq = &req->rq_set->set_waitq;
304 wq = &req->rq_reply_waitq;
307 /* Network access will complete in finite time but the HUGE
308 * timeout lets us CWARN for visibility of sluggish NALs */
309 lwi = LWI_TIMEOUT (300 * HZ, NULL, NULL);
310 rc = l_wait_event(*wq, !ptlrpc_bulk_active(desc), &lwi);
314 LASSERT (rc == -ETIMEDOUT);
315 CWARN("Unexpectedly long timeout: desc %p\n", desc);
319 int ptlrpc_send_reply (struct ptlrpc_request *req, int may_be_difficult)
321 struct ptlrpc_service *svc = req->rq_rqbd->rqbd_srv_ni->sni_service;
322 struct ptlrpc_reply_state *rs = req->rq_reply_state;
323 struct ptlrpc_connection *conn;
326 /* We must already have a reply buffer (only ptlrpc_error() may be
327 * called without one). We must also have a request buffer which
328 * is either the actual (swabbed) incoming request, or a saved copy
329 * if this is a req saved in target_queue_final_reply(). */
330 LASSERT (req->rq_reqmsg != NULL);
331 LASSERT (rs != NULL);
332 LASSERT (req->rq_repmsg != NULL);
333 LASSERT (may_be_difficult || !rs->rs_difficult);
334 LASSERT (req->rq_repmsg == &rs->rs_msg);
335 LASSERT (rs->rs_cb_id.cbid_fn == reply_out_callback);
336 LASSERT (rs->rs_cb_id.cbid_arg == rs);
338 LASSERT (req->rq_repmsg != NULL);
339 if (req->rq_type != PTL_RPC_MSG_ERR)
340 req->rq_type = PTL_RPC_MSG_REPLY;
342 req->rq_repmsg->type = req->rq_type;
343 req->rq_repmsg->status = req->rq_status;
344 req->rq_repmsg->opc = req->rq_reqmsg->opc;
346 if (req->rq_export == NULL)
347 conn = ptlrpc_get_connection(&req->rq_peer, NULL);
349 conn = ptlrpc_connection_addref(req->rq_export->exp_connection);
351 atomic_inc (&svc->srv_outstanding_replies);
353 rc = ptl_send_buf (&rs->rs_md_h, req->rq_repmsg, req->rq_replen,
354 rs->rs_difficult ? PTL_ACK_REQ : PTL_NOACK_REQ,
356 svc->srv_rep_portal, req->rq_xid);
358 atomic_dec (&svc->srv_outstanding_replies);
360 if (!rs->rs_difficult) {
361 /* Callers other than target_send_reply() expect me
362 * to clean up on a comms error */
363 lustre_free_reply_state (rs);
364 req->rq_reply_state = NULL;
365 req->rq_repmsg = NULL;
368 ptlrpc_put_connection(conn);
372 int ptlrpc_reply (struct ptlrpc_request *req)
374 return (ptlrpc_send_reply (req, 0));
377 int ptlrpc_error(struct ptlrpc_request *req)
382 if (!req->rq_repmsg) {
383 rc = lustre_pack_reply(req, 0, NULL, NULL);
388 req->rq_type = PTL_RPC_MSG_ERR;
390 rc = ptlrpc_send_reply (req, 0);
394 int ptl_send_rpc(struct ptlrpc_request *request)
398 struct ptlrpc_connection *connection;
400 ptl_process_id_t source_id;
401 ptl_handle_me_t reply_me_h;
405 LASSERT (request->rq_type == PTL_RPC_MSG_REQUEST);
407 /* If this is a re-transmit, we're required to have disengaged
408 * cleanly from the previous attempt */
409 LASSERT (!request->rq_receiving_reply);
411 connection = request->rq_import->imp_connection;
413 if (request->rq_bulk != NULL) {
414 rc = ptlrpc_register_bulk (request);
419 request->rq_reqmsg->handle = request->rq_import->imp_remote_handle;
420 request->rq_reqmsg->type = PTL_RPC_MSG_REQUEST;
421 request->rq_reqmsg->conn_cnt = request->rq_import->imp_conn_cnt;
423 source_id.nid = connection->c_peer.peer_nid;
424 source_id.pid = PTL_PID_ANY;
426 LASSERT (request->rq_replen != 0);
427 if (request->rq_repmsg == NULL)
428 OBD_ALLOC(request->rq_repmsg, request->rq_replen);
429 if (request->rq_repmsg == NULL)
430 GOTO(cleanup_bulk, rc = -ENOMEM);
432 rc = PtlMEAttach(connection->c_peer.peer_ni->pni_ni_h,
433 request->rq_reply_portal, /* XXX FIXME bug 249 */
434 source_id, request->rq_xid, 0, PTL_UNLINK,
435 PTL_INS_AFTER, &reply_me_h);
437 CERROR("PtlMEAttach failed: %d\n", rc);
438 LASSERT (rc == PTL_NO_SPACE);
439 GOTO(cleanup_repmsg, rc = -ENOMEM);
442 spin_lock_irqsave (&request->rq_lock, flags);
443 /* If the MD attach succeeds, there _will_ be a reply_in callback */
444 request->rq_receiving_reply = 1;
445 /* Clear any flags that may be present from previous sends. */
446 request->rq_replied = 0;
448 request->rq_timedout = 0;
449 request->rq_net_err = 0;
450 request->rq_resend = 0;
451 request->rq_restart = 0;
452 spin_unlock_irqrestore (&request->rq_lock, flags);
454 reply_md.start = request->rq_repmsg;
455 reply_md.length = request->rq_replen;
456 reply_md.threshold = 1;
457 reply_md.options = PTLRPC_MD_OPTIONS | PTL_MD_OP_PUT;
458 reply_md.user_ptr = &request->rq_reply_cbid;
459 reply_md.eventq = connection->c_peer.peer_ni->pni_eq_h;
461 rc = PtlMDAttach(reply_me_h, reply_md, PTL_UNLINK,
462 &request->rq_reply_md_h);
464 CERROR("PtlMDAttach failed: %d\n", rc);
465 LASSERT (rc == PTL_NO_SPACE);
466 GOTO(cleanup_me, rc -ENOMEM);
469 CDEBUG(D_NET, "Setup reply buffer: %u bytes, xid "LPU64
470 ", portal %u on %s\n",
471 request->rq_replen, request->rq_xid,
472 request->rq_reply_portal,
473 connection->c_peer.peer_ni->pni_name);
475 ptlrpc_request_addref(request); /* +1 ref for the SENT callback */
477 request->rq_sent = LTIME_S(CURRENT_TIME);
478 ptlrpc_pinger_sending_on_import(request->rq_import);
479 rc = ptl_send_buf(&request->rq_req_md_h,
480 request->rq_reqmsg, request->rq_reqlen,
481 PTL_NOACK_REQ, &request->rq_req_cbid,
483 request->rq_request_portal,
486 ptlrpc_lprocfs_rpc_sent(request);
490 ptlrpc_req_finished (request); /* drop callback ref */
493 /* MEUnlink is safe; the PUT didn't even get off the ground, and
494 * nobody apart from the PUT's target has the right nid+XID to
495 * access the reply buffer. */
496 rc2 = PtlMEUnlink(reply_me_h);
497 LASSERT (rc2 == PTL_OK);
498 /* UNLINKED callback called synchronously */
499 LASSERT (!request->rq_receiving_reply);
502 OBD_FREE(request->rq_repmsg, request->rq_replen);
503 request->rq_repmsg = NULL;
506 if (request->rq_bulk != NULL)
507 ptlrpc_unregister_bulk(request);
512 int ptlrpc_register_rqbd (struct ptlrpc_request_buffer_desc *rqbd)
514 struct ptlrpc_srv_ni *srv_ni = rqbd->rqbd_srv_ni;
515 struct ptlrpc_service *service = srv_ni->sni_service;
516 static ptl_process_id_t match_id = {PTL_NID_ANY, PTL_PID_ANY};
519 ptl_handle_me_t me_h;
521 CDEBUG(D_NET, "PtlMEAttach: portal %d on %s\n",
522 service->srv_req_portal, srv_ni->sni_ni->pni_name);
524 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_RQBD))
527 rc = PtlMEAttach(srv_ni->sni_ni->pni_ni_h, service->srv_req_portal,
528 match_id, 0, ~0, PTL_UNLINK, PTL_INS_AFTER, &me_h);
530 CERROR("PtlMEAttach failed: %d\n", rc);
534 LASSERT(rqbd->rqbd_refcount == 0);
535 rqbd->rqbd_refcount = 1;
537 md.start = rqbd->rqbd_buffer;
538 md.length = service->srv_buf_size;
539 md.max_size = service->srv_max_req_size;
540 md.threshold = PTL_MD_THRESH_INF;
541 md.options = PTLRPC_MD_OPTIONS | PTL_MD_OP_PUT | PTL_MD_MAX_SIZE;
542 md.user_ptr = &rqbd->rqbd_cbid;
543 md.eventq = srv_ni->sni_ni->pni_eq_h;
545 rc = PtlMDAttach(me_h, md, PTL_UNLINK, &rqbd->rqbd_md_h);
549 CERROR("PtlMDAttach failed: %d; \n", rc);
550 LASSERT (rc == PTL_NO_SPACE);
551 rc = PtlMEUnlink (me_h);
552 LASSERT (rc == PTL_OK);
553 rqbd->rqbd_refcount = 0;