1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011, 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
40 # define EXPORT_SYMTAB
42 #define DEBUG_SUBSYSTEM S_OSC
44 #include <libcfs/libcfs.h>
47 # include <liblustre.h>
50 #include <lustre_dlm.h>
51 #include <lustre_net.h>
52 #include <lustre/lustre_user.h>
53 #include <obd_cksum.h>
61 #include <lustre_ha.h>
62 #include <lprocfs_status.h>
63 #include <lustre_log.h>
64 #include <lustre_debug.h>
65 #include <lustre_param.h>
66 #include "osc_internal.h"
68 static void osc_release_ppga(struct brw_page **ppga, obd_count count);
69 static int brw_interpret(const struct lu_env *env,
70 struct ptlrpc_request *req, void *data, int rc);
71 static void osc_check_rpcs0(const struct lu_env *env, struct client_obd *cli,
73 int osc_cleanup(struct obd_device *obd);
75 /* Pack OSC object metadata for disk storage (LE byte order). */
76 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
77 struct lov_stripe_md *lsm)
82 lmm_size = sizeof(**lmmp);
87 OBD_FREE(*lmmp, lmm_size);
93 OBD_ALLOC(*lmmp, lmm_size);
99 LASSERT(lsm->lsm_object_id);
100 LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq);
101 (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
102 (*lmmp)->lmm_object_seq = cpu_to_le64(lsm->lsm_object_seq);
108 /* Unpack OSC object metadata from disk storage (LE byte order). */
109 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
110 struct lov_mds_md *lmm, int lmm_bytes)
113 struct obd_import *imp = class_exp2cliimp(exp);
117 if (lmm_bytes < sizeof (*lmm)) {
118 CERROR("lov_mds_md too small: %d, need %d\n",
119 lmm_bytes, (int)sizeof(*lmm));
122 /* XXX LOV_MAGIC etc check? */
124 if (lmm->lmm_object_id == 0) {
125 CERROR("lov_mds_md: zero lmm_object_id\n");
130 lsm_size = lov_stripe_md_size(1);
134 if (*lsmp != NULL && lmm == NULL) {
135 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
136 OBD_FREE(*lsmp, lsm_size);
142 OBD_ALLOC(*lsmp, lsm_size);
145 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
146 if ((*lsmp)->lsm_oinfo[0] == NULL) {
147 OBD_FREE(*lsmp, lsm_size);
150 loi_init((*lsmp)->lsm_oinfo[0]);
154 /* XXX zero *lsmp? */
155 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
156 (*lsmp)->lsm_object_seq = le64_to_cpu (lmm->lmm_object_seq);
157 LASSERT((*lsmp)->lsm_object_id);
158 LASSERT_SEQ_IS_MDT((*lsmp)->lsm_object_seq);
162 (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES))
163 (*lsmp)->lsm_maxbytes = imp->imp_connect_data.ocd_maxbytes;
165 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
170 static inline void osc_pack_capa(struct ptlrpc_request *req,
171 struct ost_body *body, void *capa)
173 struct obd_capa *oc = (struct obd_capa *)capa;
174 struct lustre_capa *c;
179 c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
182 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
183 DEBUG_CAPA(D_SEC, c, "pack");
186 static inline void osc_pack_req_body(struct ptlrpc_request *req,
187 struct obd_info *oinfo)
189 struct ost_body *body;
191 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
194 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
195 osc_pack_capa(req, body, oinfo->oi_capa);
198 static inline void osc_set_capa_size(struct ptlrpc_request *req,
199 const struct req_msg_field *field,
203 req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
205 /* it is already calculated as sizeof struct obd_capa */
209 static int osc_getattr_interpret(const struct lu_env *env,
210 struct ptlrpc_request *req,
211 struct osc_async_args *aa, int rc)
213 struct ost_body *body;
219 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
221 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
222 lustre_get_wire_obdo(aa->aa_oi->oi_oa, &body->oa);
224 /* This should really be sent by the OST */
225 aa->aa_oi->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
226 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
228 CDEBUG(D_INFO, "can't unpack ost_body\n");
230 aa->aa_oi->oi_oa->o_valid = 0;
233 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
237 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
238 struct ptlrpc_request_set *set)
240 struct ptlrpc_request *req;
241 struct osc_async_args *aa;
245 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
249 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
250 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
252 ptlrpc_request_free(req);
256 osc_pack_req_body(req, oinfo);
258 ptlrpc_request_set_replen(req);
259 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_getattr_interpret;
261 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
262 aa = ptlrpc_req_async_args(req);
265 ptlrpc_set_add_req(set, req);
269 static int osc_getattr(struct obd_export *exp, struct obd_info *oinfo)
271 struct ptlrpc_request *req;
272 struct ost_body *body;
276 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
280 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
281 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
283 ptlrpc_request_free(req);
287 osc_pack_req_body(req, oinfo);
289 ptlrpc_request_set_replen(req);
291 rc = ptlrpc_queue_wait(req);
295 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
297 GOTO(out, rc = -EPROTO);
299 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
300 lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
302 /* This should really be sent by the OST */
303 oinfo->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
304 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
308 ptlrpc_req_finished(req);
312 static int osc_setattr(struct obd_export *exp, struct obd_info *oinfo,
313 struct obd_trans_info *oti)
315 struct ptlrpc_request *req;
316 struct ost_body *body;
320 LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
322 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
326 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
327 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
329 ptlrpc_request_free(req);
333 osc_pack_req_body(req, oinfo);
335 ptlrpc_request_set_replen(req);
337 rc = ptlrpc_queue_wait(req);
341 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
343 GOTO(out, rc = -EPROTO);
345 lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
349 ptlrpc_req_finished(req);
353 static int osc_setattr_interpret(const struct lu_env *env,
354 struct ptlrpc_request *req,
355 struct osc_setattr_args *sa, int rc)
357 struct ost_body *body;
363 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
365 GOTO(out, rc = -EPROTO);
367 lustre_get_wire_obdo(sa->sa_oa, &body->oa);
369 rc = sa->sa_upcall(sa->sa_cookie, rc);
373 int osc_setattr_async_base(struct obd_export *exp, struct obd_info *oinfo,
374 struct obd_trans_info *oti,
375 obd_enqueue_update_f upcall, void *cookie,
376 struct ptlrpc_request_set *rqset)
378 struct ptlrpc_request *req;
379 struct osc_setattr_args *sa;
383 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
387 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
388 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
390 ptlrpc_request_free(req);
394 if (oti && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
395 oinfo->oi_oa->o_lcookie = *oti->oti_logcookies;
397 osc_pack_req_body(req, oinfo);
399 ptlrpc_request_set_replen(req);
401 /* do mds to ost setattr asynchronously */
403 /* Do not wait for response. */
404 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
406 req->rq_interpret_reply =
407 (ptlrpc_interpterer_t)osc_setattr_interpret;
409 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
410 sa = ptlrpc_req_async_args(req);
411 sa->sa_oa = oinfo->oi_oa;
412 sa->sa_upcall = upcall;
413 sa->sa_cookie = cookie;
415 if (rqset == PTLRPCD_SET)
416 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
418 ptlrpc_set_add_req(rqset, req);
424 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
425 struct obd_trans_info *oti,
426 struct ptlrpc_request_set *rqset)
428 return osc_setattr_async_base(exp, oinfo, oti,
429 oinfo->oi_cb_up, oinfo, rqset);
432 int osc_real_create(struct obd_export *exp, struct obdo *oa,
433 struct lov_stripe_md **ea, struct obd_trans_info *oti)
435 struct ptlrpc_request *req;
436 struct ost_body *body;
437 struct lov_stripe_md *lsm;
446 rc = obd_alloc_memmd(exp, &lsm);
451 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
453 GOTO(out, rc = -ENOMEM);
455 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
457 ptlrpc_request_free(req);
461 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
463 lustre_set_wire_obdo(&body->oa, oa);
465 ptlrpc_request_set_replen(req);
467 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
468 oa->o_flags == OBD_FL_DELORPHAN) {
470 "delorphan from OST integration");
471 /* Don't resend the delorphan req */
472 req->rq_no_resend = req->rq_no_delay = 1;
475 rc = ptlrpc_queue_wait(req);
479 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
481 GOTO(out_req, rc = -EPROTO);
483 lustre_get_wire_obdo(oa, &body->oa);
485 /* This should really be sent by the OST */
486 oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
487 oa->o_valid |= OBD_MD_FLBLKSZ;
489 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
490 * have valid lsm_oinfo data structs, so don't go touching that.
491 * This needs to be fixed in a big way.
493 lsm->lsm_object_id = oa->o_id;
494 lsm->lsm_object_seq = oa->o_seq;
498 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
500 if (oa->o_valid & OBD_MD_FLCOOKIE) {
501 if (!oti->oti_logcookies)
502 oti_alloc_cookies(oti, 1);
503 *oti->oti_logcookies = oa->o_lcookie;
507 CDEBUG(D_HA, "transno: "LPD64"\n",
508 lustre_msg_get_transno(req->rq_repmsg));
510 ptlrpc_req_finished(req);
513 obd_free_memmd(exp, &lsm);
517 int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
518 obd_enqueue_update_f upcall, void *cookie,
519 struct ptlrpc_request_set *rqset)
521 struct ptlrpc_request *req;
522 struct osc_setattr_args *sa;
523 struct ost_body *body;
527 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
531 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
532 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
534 ptlrpc_request_free(req);
537 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
538 ptlrpc_at_set_req_timeout(req);
540 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
542 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
543 osc_pack_capa(req, body, oinfo->oi_capa);
545 ptlrpc_request_set_replen(req);
548 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
549 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
550 sa = ptlrpc_req_async_args(req);
551 sa->sa_oa = oinfo->oi_oa;
552 sa->sa_upcall = upcall;
553 sa->sa_cookie = cookie;
554 if (rqset == PTLRPCD_SET)
555 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
557 ptlrpc_set_add_req(rqset, req);
562 static int osc_punch(struct obd_export *exp, struct obd_info *oinfo,
563 struct obd_trans_info *oti,
564 struct ptlrpc_request_set *rqset)
566 oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
567 oinfo->oi_oa->o_blocks = oinfo->oi_policy.l_extent.end;
568 oinfo->oi_oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
569 return osc_punch_base(exp, oinfo,
570 oinfo->oi_cb_up, oinfo, rqset);
573 static int osc_sync_interpret(const struct lu_env *env,
574 struct ptlrpc_request *req,
577 struct osc_async_args *aa = arg;
578 struct ost_body *body;
584 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
586 CERROR ("can't unpack ost_body\n");
587 GOTO(out, rc = -EPROTO);
590 *aa->aa_oi->oi_oa = body->oa;
592 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
596 static int osc_sync(struct obd_export *exp, struct obd_info *oinfo,
597 obd_size start, obd_size end,
598 struct ptlrpc_request_set *set)
600 struct ptlrpc_request *req;
601 struct ost_body *body;
602 struct osc_async_args *aa;
607 CDEBUG(D_INFO, "oa NULL\n");
611 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
615 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
616 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
618 ptlrpc_request_free(req);
622 /* overload the size and blocks fields in the oa with start/end */
623 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
625 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
626 body->oa.o_size = start;
627 body->oa.o_blocks = end;
628 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
629 osc_pack_capa(req, body, oinfo->oi_capa);
631 ptlrpc_request_set_replen(req);
632 req->rq_interpret_reply = osc_sync_interpret;
634 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
635 aa = ptlrpc_req_async_args(req);
638 ptlrpc_set_add_req(set, req);
642 /* Find and cancel locally locks matched by @mode in the resource found by
643 * @objid. Found locks are added into @cancel list. Returns the amount of
644 * locks added to @cancels list. */
645 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
647 ldlm_mode_t mode, int lock_flags)
649 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
650 struct ldlm_res_id res_id;
651 struct ldlm_resource *res;
655 osc_build_res_name(oa->o_id, oa->o_seq, &res_id);
656 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
660 LDLM_RESOURCE_ADDREF(res);
661 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
662 lock_flags, 0, NULL);
663 LDLM_RESOURCE_DELREF(res);
664 ldlm_resource_putref(res);
668 static int osc_destroy_interpret(const struct lu_env *env,
669 struct ptlrpc_request *req, void *data,
672 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
674 cfs_atomic_dec(&cli->cl_destroy_in_flight);
675 cfs_waitq_signal(&cli->cl_destroy_waitq);
679 static int osc_can_send_destroy(struct client_obd *cli)
681 if (cfs_atomic_inc_return(&cli->cl_destroy_in_flight) <=
682 cli->cl_max_rpcs_in_flight) {
683 /* The destroy request can be sent */
686 if (cfs_atomic_dec_return(&cli->cl_destroy_in_flight) <
687 cli->cl_max_rpcs_in_flight) {
689 * The counter has been modified between the two atomic
692 cfs_waitq_signal(&cli->cl_destroy_waitq);
697 /* Destroy requests can be async always on the client, and we don't even really
698 * care about the return code since the client cannot do anything at all about
700 * When the MDS is unlinking a filename, it saves the file objects into a
701 * recovery llog, and these object records are cancelled when the OST reports
702 * they were destroyed and sync'd to disk (i.e. transaction committed).
703 * If the client dies, or the OST is down when the object should be destroyed,
704 * the records are not cancelled, and when the OST reconnects to the MDS next,
705 * it will retrieve the llog unlink logs and then sends the log cancellation
706 * cookies to the MDS after committing destroy transactions. */
707 static int osc_destroy(struct obd_export *exp, struct obdo *oa,
708 struct lov_stripe_md *ea, struct obd_trans_info *oti,
709 struct obd_export *md_export, void *capa)
711 struct client_obd *cli = &exp->exp_obd->u.cli;
712 struct ptlrpc_request *req;
713 struct ost_body *body;
714 CFS_LIST_HEAD(cancels);
719 CDEBUG(D_INFO, "oa NULL\n");
723 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
724 LDLM_FL_DISCARD_DATA);
726 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
728 ldlm_lock_list_put(&cancels, l_bl_ast, count);
732 osc_set_capa_size(req, &RMF_CAPA1, (struct obd_capa *)capa);
733 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
736 ptlrpc_request_free(req);
740 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
741 ptlrpc_at_set_req_timeout(req);
743 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
744 oa->o_lcookie = *oti->oti_logcookies;
745 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
747 lustre_set_wire_obdo(&body->oa, oa);
749 osc_pack_capa(req, body, (struct obd_capa *)capa);
750 ptlrpc_request_set_replen(req);
752 /* don't throttle destroy RPCs for the MDT */
753 if (!(cli->cl_import->imp_connect_flags_orig & OBD_CONNECT_MDS)) {
754 req->rq_interpret_reply = osc_destroy_interpret;
755 if (!osc_can_send_destroy(cli)) {
756 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP,
760 * Wait until the number of on-going destroy RPCs drops
761 * under max_rpc_in_flight
763 l_wait_event_exclusive(cli->cl_destroy_waitq,
764 osc_can_send_destroy(cli), &lwi);
768 /* Do not wait for response */
769 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
773 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
776 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
778 LASSERT(!(oa->o_valid & bits));
781 client_obd_list_lock(&cli->cl_loi_list_lock);
782 oa->o_dirty = cli->cl_dirty;
783 if (cli->cl_dirty - cli->cl_dirty_transit > cli->cl_dirty_max) {
784 CERROR("dirty %lu - %lu > dirty_max %lu\n",
785 cli->cl_dirty, cli->cl_dirty_transit, cli->cl_dirty_max);
787 } else if (cfs_atomic_read(&obd_dirty_pages) -
788 cfs_atomic_read(&obd_dirty_transit_pages) >
789 obd_max_dirty_pages + 1){
790 /* The cfs_atomic_read() allowing the cfs_atomic_inc() are
791 * not covered by a lock thus they may safely race and trip
792 * this CERROR() unless we add in a small fudge factor (+1). */
793 CERROR("dirty %d - %d > system dirty_max %d\n",
794 cfs_atomic_read(&obd_dirty_pages),
795 cfs_atomic_read(&obd_dirty_transit_pages),
796 obd_max_dirty_pages);
798 } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
799 CERROR("dirty %lu - dirty_max %lu too big???\n",
800 cli->cl_dirty, cli->cl_dirty_max);
803 long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
804 (cli->cl_max_rpcs_in_flight + 1);
805 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
807 oa->o_grant = cli->cl_avail_grant;
808 oa->o_dropped = cli->cl_lost_grant;
809 cli->cl_lost_grant = 0;
810 client_obd_list_unlock(&cli->cl_loi_list_lock);
811 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
812 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
816 static void osc_update_next_shrink(struct client_obd *cli)
818 cli->cl_next_shrink_grant =
819 cfs_time_shift(cli->cl_grant_shrink_interval);
820 CDEBUG(D_CACHE, "next time %ld to shrink grant \n",
821 cli->cl_next_shrink_grant);
824 /* caller must hold loi_list_lock */
825 static void osc_consume_write_grant(struct client_obd *cli,
826 struct brw_page *pga)
828 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock.lock);
829 LASSERT(!(pga->flag & OBD_BRW_FROM_GRANT));
830 cfs_atomic_inc(&obd_dirty_pages);
831 cli->cl_dirty += CFS_PAGE_SIZE;
832 cli->cl_avail_grant -= CFS_PAGE_SIZE;
833 pga->flag |= OBD_BRW_FROM_GRANT;
834 CDEBUG(D_CACHE, "using %lu grant credits for brw %p page %p\n",
835 CFS_PAGE_SIZE, pga, pga->pg);
836 LASSERT(cli->cl_avail_grant >= 0);
837 osc_update_next_shrink(cli);
840 /* the companion to osc_consume_write_grant, called when a brw has completed.
841 * must be called with the loi lock held. */
842 static void osc_release_write_grant(struct client_obd *cli,
843 struct brw_page *pga, int sent)
845 int blocksize = cli->cl_import->imp_obd->obd_osfs.os_bsize ? : 4096;
848 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock.lock);
849 if (!(pga->flag & OBD_BRW_FROM_GRANT)) {
854 pga->flag &= ~OBD_BRW_FROM_GRANT;
855 cfs_atomic_dec(&obd_dirty_pages);
856 cli->cl_dirty -= CFS_PAGE_SIZE;
857 if (pga->flag & OBD_BRW_NOCACHE) {
858 pga->flag &= ~OBD_BRW_NOCACHE;
859 cfs_atomic_dec(&obd_dirty_transit_pages);
860 cli->cl_dirty_transit -= CFS_PAGE_SIZE;
863 /* Reclaim grant from truncated pages. This is used to solve
864 * write-truncate and grant all gone(to lost_grant) problem.
865 * For a vfs write this problem can be easily solved by a sync
866 * write, however, this is not an option for page_mkwrite()
867 * because grant has to be allocated before a page becomes
869 if (cli->cl_avail_grant < PTLRPC_MAX_BRW_SIZE)
870 cli->cl_avail_grant += CFS_PAGE_SIZE;
872 cli->cl_lost_grant += CFS_PAGE_SIZE;
873 CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
874 cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
875 } else if (CFS_PAGE_SIZE != blocksize && pga->count != CFS_PAGE_SIZE) {
876 /* For short writes we shouldn't count parts of pages that
877 * span a whole block on the OST side, or our accounting goes
878 * wrong. Should match the code in filter_grant_check. */
879 int offset = pga->off & ~CFS_PAGE_MASK;
880 int count = pga->count + (offset & (blocksize - 1));
881 int end = (offset + pga->count) & (blocksize - 1);
883 count += blocksize - end;
885 cli->cl_lost_grant += CFS_PAGE_SIZE - count;
886 CDEBUG(D_CACHE, "lost %lu grant: %lu avail: %lu dirty: %lu\n",
887 CFS_PAGE_SIZE - count, cli->cl_lost_grant,
888 cli->cl_avail_grant, cli->cl_dirty);
894 static unsigned long rpcs_in_flight(struct client_obd *cli)
896 return cli->cl_r_in_flight + cli->cl_w_in_flight;
899 /* caller must hold loi_list_lock */
900 void osc_wake_cache_waiters(struct client_obd *cli)
903 struct osc_cache_waiter *ocw;
906 cfs_list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
907 /* if we can't dirty more, we must wait until some is written */
908 if ((cli->cl_dirty + CFS_PAGE_SIZE > cli->cl_dirty_max) ||
909 (cfs_atomic_read(&obd_dirty_pages) + 1 >
910 obd_max_dirty_pages)) {
911 CDEBUG(D_CACHE, "no dirty room: dirty: %ld "
912 "osc max %ld, sys max %d\n", cli->cl_dirty,
913 cli->cl_dirty_max, obd_max_dirty_pages);
917 /* if still dirty cache but no grant wait for pending RPCs that
918 * may yet return us some grant before doing sync writes */
919 if (cli->cl_w_in_flight && cli->cl_avail_grant < CFS_PAGE_SIZE) {
920 CDEBUG(D_CACHE, "%u BRW writes in flight, no grant\n",
921 cli->cl_w_in_flight);
925 ocw = cfs_list_entry(l, struct osc_cache_waiter, ocw_entry);
926 cfs_list_del_init(&ocw->ocw_entry);
927 if (cli->cl_avail_grant < CFS_PAGE_SIZE) {
928 /* no more RPCs in flight to return grant, do sync IO */
929 ocw->ocw_rc = -EDQUOT;
930 CDEBUG(D_INODE, "wake oap %p for sync\n", ocw->ocw_oap);
932 osc_consume_write_grant(cli,
933 &ocw->ocw_oap->oap_brw_page);
936 CDEBUG(D_CACHE, "wake up %p for oap %p, avail grant %ld\n",
937 ocw, ocw->ocw_oap, cli->cl_avail_grant);
939 cfs_waitq_signal(&ocw->ocw_waitq);
945 static void __osc_update_grant(struct client_obd *cli, obd_size grant)
947 client_obd_list_lock(&cli->cl_loi_list_lock);
948 cli->cl_avail_grant += grant;
949 client_obd_list_unlock(&cli->cl_loi_list_lock);
952 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
954 if (body->oa.o_valid & OBD_MD_FLGRANT) {
955 CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
956 __osc_update_grant(cli, body->oa.o_grant);
960 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
961 void *key, obd_count vallen, void *val,
962 struct ptlrpc_request_set *set);
964 static int osc_shrink_grant_interpret(const struct lu_env *env,
965 struct ptlrpc_request *req,
968 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
969 struct obdo *oa = ((struct osc_grant_args *)aa)->aa_oa;
970 struct ost_body *body;
973 __osc_update_grant(cli, oa->o_grant);
977 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
979 osc_update_grant(cli, body);
985 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
987 client_obd_list_lock(&cli->cl_loi_list_lock);
988 oa->o_grant = cli->cl_avail_grant / 4;
989 cli->cl_avail_grant -= oa->o_grant;
990 client_obd_list_unlock(&cli->cl_loi_list_lock);
991 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
992 oa->o_valid |= OBD_MD_FLFLAGS;
995 oa->o_flags |= OBD_FL_SHRINK_GRANT;
996 osc_update_next_shrink(cli);
999 /* Shrink the current grant, either from some large amount to enough for a
1000 * full set of in-flight RPCs, or if we have already shrunk to that limit
1001 * then to enough for a single RPC. This avoids keeping more grant than
1002 * needed, and avoids shrinking the grant piecemeal. */
1003 static int osc_shrink_grant(struct client_obd *cli)
1005 long target = (cli->cl_max_rpcs_in_flight + 1) *
1006 cli->cl_max_pages_per_rpc;
1008 client_obd_list_lock(&cli->cl_loi_list_lock);
1009 if (cli->cl_avail_grant <= target)
1010 target = cli->cl_max_pages_per_rpc;
1011 client_obd_list_unlock(&cli->cl_loi_list_lock);
1013 return osc_shrink_grant_to_target(cli, target);
1016 int osc_shrink_grant_to_target(struct client_obd *cli, long target)
1019 struct ost_body *body;
1022 client_obd_list_lock(&cli->cl_loi_list_lock);
1023 /* Don't shrink if we are already above or below the desired limit
1024 * We don't want to shrink below a single RPC, as that will negatively
1025 * impact block allocation and long-term performance. */
1026 if (target < cli->cl_max_pages_per_rpc)
1027 target = cli->cl_max_pages_per_rpc;
1029 if (target >= cli->cl_avail_grant) {
1030 client_obd_list_unlock(&cli->cl_loi_list_lock);
1033 client_obd_list_unlock(&cli->cl_loi_list_lock);
1035 OBD_ALLOC_PTR(body);
1039 osc_announce_cached(cli, &body->oa, 0);
1041 client_obd_list_lock(&cli->cl_loi_list_lock);
1042 body->oa.o_grant = cli->cl_avail_grant - target;
1043 cli->cl_avail_grant = target;
1044 client_obd_list_unlock(&cli->cl_loi_list_lock);
1045 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
1046 body->oa.o_valid |= OBD_MD_FLFLAGS;
1047 body->oa.o_flags = 0;
1049 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
1050 osc_update_next_shrink(cli);
1052 rc = osc_set_info_async(cli->cl_import->imp_obd->obd_self_export,
1053 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
1054 sizeof(*body), body, NULL);
1056 __osc_update_grant(cli, body->oa.o_grant);
1061 #define GRANT_SHRINK_LIMIT PTLRPC_MAX_BRW_SIZE
1062 static int osc_should_shrink_grant(struct client_obd *client)
1064 cfs_time_t time = cfs_time_current();
1065 cfs_time_t next_shrink = client->cl_next_shrink_grant;
1067 if ((client->cl_import->imp_connect_data.ocd_connect_flags &
1068 OBD_CONNECT_GRANT_SHRINK) == 0)
1071 if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
1072 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
1073 client->cl_avail_grant > GRANT_SHRINK_LIMIT)
1076 osc_update_next_shrink(client);
1081 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
1083 struct client_obd *client;
1085 cfs_list_for_each_entry(client, &item->ti_obd_list,
1086 cl_grant_shrink_list) {
1087 if (osc_should_shrink_grant(client))
1088 osc_shrink_grant(client);
1093 static int osc_add_shrink_grant(struct client_obd *client)
1097 rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
1099 osc_grant_shrink_grant_cb, NULL,
1100 &client->cl_grant_shrink_list);
1102 CERROR("add grant client %s error %d\n",
1103 client->cl_import->imp_obd->obd_name, rc);
1106 CDEBUG(D_CACHE, "add grant client %s \n",
1107 client->cl_import->imp_obd->obd_name);
1108 osc_update_next_shrink(client);
1112 static int osc_del_shrink_grant(struct client_obd *client)
1114 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
1118 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
1121 * ocd_grant is the total grant amount we're expect to hold: if we've
1122 * been evicted, it's the new avail_grant amount, cl_dirty will drop
1123 * to 0 as inflight RPCs fail out; otherwise, it's avail_grant + dirty.
1125 * race is tolerable here: if we're evicted, but imp_state already
1126 * left EVICTED state, then cl_dirty must be 0 already.
1128 client_obd_list_lock(&cli->cl_loi_list_lock);
1129 if (cli->cl_import->imp_state == LUSTRE_IMP_EVICTED)
1130 cli->cl_avail_grant = ocd->ocd_grant;
1132 cli->cl_avail_grant = ocd->ocd_grant - cli->cl_dirty;
1134 if (cli->cl_avail_grant < 0) {
1135 CWARN("%s: available grant < 0, the OSS is probably not running"
1136 " with patch from bug20278 (%ld) \n",
1137 cli->cl_import->imp_obd->obd_name, cli->cl_avail_grant);
1138 /* workaround for 1.6 servers which do not have
1139 * the patch from bug20278 */
1140 cli->cl_avail_grant = ocd->ocd_grant;
1143 client_obd_list_unlock(&cli->cl_loi_list_lock);
1145 CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld \n",
1146 cli->cl_import->imp_obd->obd_name,
1147 cli->cl_avail_grant, cli->cl_lost_grant);
1149 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
1150 cfs_list_empty(&cli->cl_grant_shrink_list))
1151 osc_add_shrink_grant(cli);
1154 /* We assume that the reason this OSC got a short read is because it read
1155 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1156 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1157 * this stripe never got written at or beyond this stripe offset yet. */
1158 static void handle_short_read(int nob_read, obd_count page_count,
1159 struct brw_page **pga)
1164 /* skip bytes read OK */
1165 while (nob_read > 0) {
1166 LASSERT (page_count > 0);
1168 if (pga[i]->count > nob_read) {
1169 /* EOF inside this page */
1170 ptr = cfs_kmap(pga[i]->pg) +
1171 (pga[i]->off & ~CFS_PAGE_MASK);
1172 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1173 cfs_kunmap(pga[i]->pg);
1179 nob_read -= pga[i]->count;
1184 /* zero remaining pages */
1185 while (page_count-- > 0) {
1186 ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
1187 memset(ptr, 0, pga[i]->count);
1188 cfs_kunmap(pga[i]->pg);
1193 static int check_write_rcs(struct ptlrpc_request *req,
1194 int requested_nob, int niocount,
1195 obd_count page_count, struct brw_page **pga)
1200 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1201 sizeof(*remote_rcs) *
1203 if (remote_rcs == NULL) {
1204 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1208 /* return error if any niobuf was in error */
1209 for (i = 0; i < niocount; i++) {
1210 if ((int)remote_rcs[i] < 0)
1211 return(remote_rcs[i]);
1213 if (remote_rcs[i] != 0) {
1214 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1215 i, remote_rcs[i], req);
1220 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
1221 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1222 req->rq_bulk->bd_nob_transferred, requested_nob);
1229 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1231 if (p1->flag != p2->flag) {
1232 unsigned mask = ~(OBD_BRW_FROM_GRANT| OBD_BRW_NOCACHE|
1233 OBD_BRW_SYNC|OBD_BRW_ASYNC|OBD_BRW_NOQUOTA);
1235 /* warn if we try to combine flags that we don't know to be
1236 * safe to combine */
1237 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1238 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1239 "report this at http://bugs.whamcloud.com/\n",
1240 p1->flag, p2->flag);
1245 return (p1->off + p1->count == p2->off);
1248 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
1249 struct brw_page **pga, int opc,
1250 cksum_type_t cksum_type)
1255 LASSERT (pg_count > 0);
1256 cksum = init_checksum(cksum_type);
1257 while (nob > 0 && pg_count > 0) {
1258 unsigned char *ptr = cfs_kmap(pga[i]->pg);
1259 int off = pga[i]->off & ~CFS_PAGE_MASK;
1260 int count = pga[i]->count > nob ? nob : pga[i]->count;
1262 /* corrupt the data before we compute the checksum, to
1263 * simulate an OST->client data error */
1264 if (i == 0 && opc == OST_READ &&
1265 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
1266 memcpy(ptr + off, "bad1", min(4, nob));
1267 cksum = compute_checksum(cksum, ptr + off, count, cksum_type);
1268 cfs_kunmap(pga[i]->pg);
1269 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
1272 nob -= pga[i]->count;
1276 /* For sending we only compute the wrong checksum instead
1277 * of corrupting the data so it is still correct on a redo */
1278 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1281 return fini_checksum(cksum, cksum_type);
1284 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
1285 struct lov_stripe_md *lsm, obd_count page_count,
1286 struct brw_page **pga,
1287 struct ptlrpc_request **reqp,
1288 struct obd_capa *ocapa, int reserve,
1291 struct ptlrpc_request *req;
1292 struct ptlrpc_bulk_desc *desc;
1293 struct ost_body *body;
1294 struct obd_ioobj *ioobj;
1295 struct niobuf_remote *niobuf;
1296 int niocount, i, requested_nob, opc, rc;
1297 struct osc_brw_async_args *aa;
1298 struct req_capsule *pill;
1299 struct brw_page *pg_prev;
1302 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1303 RETURN(-ENOMEM); /* Recoverable */
1304 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1305 RETURN(-EINVAL); /* Fatal */
1307 if ((cmd & OBD_BRW_WRITE) != 0) {
1309 req = ptlrpc_request_alloc_pool(cli->cl_import,
1310 cli->cl_import->imp_rq_pool,
1311 &RQF_OST_BRW_WRITE);
1314 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1319 for (niocount = i = 1; i < page_count; i++) {
1320 if (!can_merge_pages(pga[i - 1], pga[i]))
1324 pill = &req->rq_pill;
1325 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1327 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1328 niocount * sizeof(*niobuf));
1329 osc_set_capa_size(req, &RMF_CAPA1, ocapa);
1331 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1333 ptlrpc_request_free(req);
1336 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1337 ptlrpc_at_set_req_timeout(req);
1339 if (opc == OST_WRITE)
1340 desc = ptlrpc_prep_bulk_imp(req, page_count,
1341 BULK_GET_SOURCE, OST_BULK_PORTAL);
1343 desc = ptlrpc_prep_bulk_imp(req, page_count,
1344 BULK_PUT_SINK, OST_BULK_PORTAL);
1347 GOTO(out, rc = -ENOMEM);
1348 /* NB request now owns desc and will free it when it gets freed */
1350 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1351 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1352 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1353 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1355 lustre_set_wire_obdo(&body->oa, oa);
1357 obdo_to_ioobj(oa, ioobj);
1358 ioobj->ioo_bufcnt = niocount;
1359 osc_pack_capa(req, body, ocapa);
1360 LASSERT (page_count > 0);
1362 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1363 struct brw_page *pg = pga[i];
1364 int poff = pg->off & ~CFS_PAGE_MASK;
1366 LASSERT(pg->count > 0);
1367 /* make sure there is no gap in the middle of page array */
1368 LASSERTF(page_count == 1 ||
1369 (ergo(i == 0, poff + pg->count == CFS_PAGE_SIZE) &&
1370 ergo(i > 0 && i < page_count - 1,
1371 poff == 0 && pg->count == CFS_PAGE_SIZE) &&
1372 ergo(i == page_count - 1, poff == 0)),
1373 "i: %d/%d pg: %p off: "LPU64", count: %u\n",
1374 i, page_count, pg, pg->off, pg->count);
1376 LASSERTF(i == 0 || pg->off > pg_prev->off,
1377 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1378 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1380 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1381 pg_prev->pg, page_private(pg_prev->pg),
1382 pg_prev->pg->index, pg_prev->off);
1384 LASSERTF(i == 0 || pg->off > pg_prev->off,
1385 "i %d p_c %u\n", i, page_count);
1387 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1388 (pg->flag & OBD_BRW_SRVLOCK));
1390 ptlrpc_prep_bulk_page(desc, pg->pg, poff, pg->count);
1391 requested_nob += pg->count;
1393 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1395 niobuf->len += pg->count;
1397 niobuf->offset = pg->off;
1398 niobuf->len = pg->count;
1399 niobuf->flags = pg->flag;
1404 LASSERTF((void *)(niobuf - niocount) ==
1405 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1406 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1407 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1409 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1411 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1412 body->oa.o_valid |= OBD_MD_FLFLAGS;
1413 body->oa.o_flags = 0;
1415 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1418 if (osc_should_shrink_grant(cli))
1419 osc_shrink_grant_local(cli, &body->oa);
1421 /* size[REQ_REC_OFF] still sizeof (*body) */
1422 if (opc == OST_WRITE) {
1423 if (cli->cl_checksum &&
1424 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1425 /* store cl_cksum_type in a local variable since
1426 * it can be changed via lprocfs */
1427 cksum_type_t cksum_type = cli->cl_cksum_type;
1429 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1430 oa->o_flags &= OBD_FL_LOCAL_MASK;
1431 body->oa.o_flags = 0;
1433 body->oa.o_flags |= cksum_type_pack(cksum_type);
1434 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1435 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1439 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1441 /* save this in 'oa', too, for later checking */
1442 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1443 oa->o_flags |= cksum_type_pack(cksum_type);
1445 /* clear out the checksum flag, in case this is a
1446 * resend but cl_checksum is no longer set. b=11238 */
1447 oa->o_valid &= ~OBD_MD_FLCKSUM;
1449 oa->o_cksum = body->oa.o_cksum;
1450 /* 1 RC per niobuf */
1451 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1452 sizeof(__u32) * niocount);
1454 if (cli->cl_checksum &&
1455 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1456 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1457 body->oa.o_flags = 0;
1458 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1459 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1462 ptlrpc_request_set_replen(req);
1464 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1465 aa = ptlrpc_req_async_args(req);
1467 aa->aa_requested_nob = requested_nob;
1468 aa->aa_nio_count = niocount;
1469 aa->aa_page_count = page_count;
1473 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1474 if (ocapa && reserve)
1475 aa->aa_ocapa = capa_get(ocapa);
1481 ptlrpc_req_finished(req);
1485 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1486 __u32 client_cksum, __u32 server_cksum, int nob,
1487 obd_count page_count, struct brw_page **pga,
1488 cksum_type_t client_cksum_type)
1492 cksum_type_t cksum_type;
1494 if (server_cksum == client_cksum) {
1495 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1499 cksum_type = cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1501 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1504 if (cksum_type != client_cksum_type)
1505 msg = "the server did not use the checksum type specified in "
1506 "the original request - likely a protocol problem";
1507 else if (new_cksum == server_cksum)
1508 msg = "changed on the client after we checksummed it - "
1509 "likely false positive due to mmap IO (bug 11742)";
1510 else if (new_cksum == client_cksum)
1511 msg = "changed in transit before arrival at OST";
1513 msg = "changed in transit AND doesn't match the original - "
1514 "likely false positive due to mmap IO (bug 11742)";
1516 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inode "DFID
1517 " object "LPU64"/"LPU64" extent ["LPU64"-"LPU64"]\n",
1518 msg, libcfs_nid2str(peer->nid),
1519 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1520 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1521 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1523 oa->o_valid & OBD_MD_FLGROUP ? oa->o_seq : (__u64)0,
1525 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1526 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1527 "client csum now %x\n", client_cksum, client_cksum_type,
1528 server_cksum, cksum_type, new_cksum);
1532 /* Note rc enters this function as number of bytes transferred */
1533 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1535 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1536 const lnet_process_id_t *peer =
1537 &req->rq_import->imp_connection->c_peer;
1538 struct client_obd *cli = aa->aa_cli;
1539 struct ost_body *body;
1540 __u32 client_cksum = 0;
1543 if (rc < 0 && rc != -EDQUOT) {
1544 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1548 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1549 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1551 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1555 /* set/clear over quota flag for a uid/gid */
1556 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1557 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) {
1558 unsigned int qid[MAXQUOTAS] = { body->oa.o_uid, body->oa.o_gid };
1560 CDEBUG(D_QUOTA, "setdq for [%u %u] with valid "LPX64", flags %x\n",
1561 body->oa.o_uid, body->oa.o_gid, body->oa.o_valid,
1563 osc_quota_setdq(cli, qid, body->oa.o_valid, body->oa.o_flags);
1566 osc_update_grant(cli, body);
1571 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1572 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1574 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1576 CERROR("Unexpected +ve rc %d\n", rc);
1579 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1581 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1584 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1585 check_write_checksum(&body->oa, peer, client_cksum,
1586 body->oa.o_cksum, aa->aa_requested_nob,
1587 aa->aa_page_count, aa->aa_ppga,
1588 cksum_type_unpack(aa->aa_oa->o_flags)))
1591 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1592 aa->aa_page_count, aa->aa_ppga);
1596 /* The rest of this function executes only for OST_READs */
1598 /* if unwrap_bulk failed, return -EAGAIN to retry */
1599 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1601 GOTO(out, rc = -EAGAIN);
1603 if (rc > aa->aa_requested_nob) {
1604 CERROR("Unexpected rc %d (%d requested)\n", rc,
1605 aa->aa_requested_nob);
1609 if (rc != req->rq_bulk->bd_nob_transferred) {
1610 CERROR ("Unexpected rc %d (%d transferred)\n",
1611 rc, req->rq_bulk->bd_nob_transferred);
1615 if (rc < aa->aa_requested_nob)
1616 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1618 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1619 static int cksum_counter;
1620 __u32 server_cksum = body->oa.o_cksum;
1623 cksum_type_t cksum_type;
1625 cksum_type = cksum_type_unpack(body->oa.o_valid &OBD_MD_FLFLAGS?
1626 body->oa.o_flags : 0);
1627 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1628 aa->aa_ppga, OST_READ,
1631 if (peer->nid == req->rq_bulk->bd_sender) {
1635 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1638 if (server_cksum == ~0 && rc > 0) {
1639 CERROR("Protocol error: server %s set the 'checksum' "
1640 "bit, but didn't send a checksum. Not fatal, "
1641 "but please notify on http://bugs.whamcloud.com/\n",
1642 libcfs_nid2str(peer->nid));
1643 } else if (server_cksum != client_cksum) {
1644 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1645 "%s%s%s inode "DFID" object "
1646 LPU64"/"LPU64" extent "
1647 "["LPU64"-"LPU64"]\n",
1648 req->rq_import->imp_obd->obd_name,
1649 libcfs_nid2str(peer->nid),
1651 body->oa.o_valid & OBD_MD_FLFID ?
1652 body->oa.o_parent_seq : (__u64)0,
1653 body->oa.o_valid & OBD_MD_FLFID ?
1654 body->oa.o_parent_oid : 0,
1655 body->oa.o_valid & OBD_MD_FLFID ?
1656 body->oa.o_parent_ver : 0,
1658 body->oa.o_valid & OBD_MD_FLGROUP ?
1659 body->oa.o_seq : (__u64)0,
1660 aa->aa_ppga[0]->off,
1661 aa->aa_ppga[aa->aa_page_count-1]->off +
1662 aa->aa_ppga[aa->aa_page_count-1]->count -
1664 CERROR("client %x, server %x, cksum_type %x\n",
1665 client_cksum, server_cksum, cksum_type);
1667 aa->aa_oa->o_cksum = client_cksum;
1671 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1674 } else if (unlikely(client_cksum)) {
1675 static int cksum_missed;
1678 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1679 CERROR("Checksum %u requested from %s but not sent\n",
1680 cksum_missed, libcfs_nid2str(peer->nid));
1686 lustre_get_wire_obdo(aa->aa_oa, &body->oa);
1691 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1692 struct lov_stripe_md *lsm,
1693 obd_count page_count, struct brw_page **pga,
1694 struct obd_capa *ocapa)
1696 struct ptlrpc_request *req;
1699 int generation, resends = 0;
1700 struct l_wait_info lwi;
1704 cfs_waitq_init(&waitq);
1705 generation = exp->exp_obd->u.cli.cl_import->imp_generation;
1708 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1709 page_count, pga, &req, ocapa, 0, resends);
1714 req->rq_generation_set = 1;
1715 req->rq_import_generation = generation;
1718 rc = ptlrpc_queue_wait(req);
1720 if (rc == -ETIMEDOUT && req->rq_resend) {
1721 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1722 ptlrpc_req_finished(req);
1726 rc = osc_brw_fini_request(req, rc);
1728 ptlrpc_req_finished(req);
1729 /* When server return -EINPROGRESS, client should always retry
1730 * regardless of the number of times the bulk was resent already.*/
1731 if (osc_recoverable_error(rc)) {
1733 if (rc != -EINPROGRESS &&
1734 !client_should_resend(resends, &exp->exp_obd->u.cli)) {
1735 CERROR("%s: too many resend retries for object: "
1736 ""LPU64":"LPU64", rc = %d.\n",
1737 exp->exp_obd->obd_name, oa->o_id, oa->o_seq, rc);
1741 exp->exp_obd->u.cli.cl_import->imp_generation) {
1742 CDEBUG(D_HA, "%s: resend cross eviction for object: "
1743 ""LPU64":"LPU64", rc = %d.\n",
1744 exp->exp_obd->obd_name, oa->o_id, oa->o_seq, rc);
1748 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL,
1750 l_wait_event(waitq, 0, &lwi);
1755 if (rc == -EAGAIN || rc == -EINPROGRESS)
1760 int osc_brw_redo_request(struct ptlrpc_request *request,
1761 struct osc_brw_async_args *aa)
1763 struct ptlrpc_request *new_req;
1764 struct ptlrpc_request_set *set = request->rq_set;
1765 struct osc_brw_async_args *new_aa;
1766 struct osc_async_page *oap;
1770 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1772 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1773 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1774 aa->aa_cli, aa->aa_oa,
1775 NULL /* lsm unused by osc currently */,
1776 aa->aa_page_count, aa->aa_ppga,
1777 &new_req, aa->aa_ocapa, 0, 1);
1781 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1783 cfs_list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1784 if (oap->oap_request != NULL) {
1785 LASSERTF(request == oap->oap_request,
1786 "request %p != oap_request %p\n",
1787 request, oap->oap_request);
1788 if (oap->oap_interrupted) {
1789 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1790 ptlrpc_req_finished(new_req);
1795 /* New request takes over pga and oaps from old request.
1796 * Note that copying a list_head doesn't work, need to move it... */
1798 new_req->rq_interpret_reply = request->rq_interpret_reply;
1799 new_req->rq_async_args = request->rq_async_args;
1800 new_req->rq_sent = cfs_time_current_sec() + aa->aa_resends;
1801 new_req->rq_generation_set = 1;
1802 new_req->rq_import_generation = request->rq_import_generation;
1804 new_aa = ptlrpc_req_async_args(new_req);
1806 CFS_INIT_LIST_HEAD(&new_aa->aa_oaps);
1807 cfs_list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1808 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1810 cfs_list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1811 if (oap->oap_request) {
1812 ptlrpc_req_finished(oap->oap_request);
1813 oap->oap_request = ptlrpc_request_addref(new_req);
1817 new_aa->aa_ocapa = aa->aa_ocapa;
1818 aa->aa_ocapa = NULL;
1820 /* use ptlrpc_set_add_req is safe because interpret functions work
1821 * in check_set context. only one way exist with access to request
1822 * from different thread got -EINTR - this way protected with
1823 * cl_loi_list_lock */
1824 ptlrpc_set_add_req(set, new_req);
1826 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1828 DEBUG_REQ(D_INFO, new_req, "new request");
1833 * ugh, we want disk allocation on the target to happen in offset order. we'll
1834 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1835 * fine for our small page arrays and doesn't require allocation. its an
1836 * insertion sort that swaps elements that are strides apart, shrinking the
1837 * stride down until its '1' and the array is sorted.
1839 static void sort_brw_pages(struct brw_page **array, int num)
1842 struct brw_page *tmp;
1846 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1851 for (i = stride ; i < num ; i++) {
1854 while (j >= stride && array[j - stride]->off > tmp->off) {
1855 array[j] = array[j - stride];
1860 } while (stride > 1);
1863 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1869 LASSERT (pages > 0);
1870 offset = pg[i]->off & ~CFS_PAGE_MASK;
1874 if (pages == 0) /* that's all */
1877 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1878 return count; /* doesn't end on page boundary */
1881 offset = pg[i]->off & ~CFS_PAGE_MASK;
1882 if (offset != 0) /* doesn't start on page boundary */
1889 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1891 struct brw_page **ppga;
1894 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1898 for (i = 0; i < count; i++)
1903 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1905 LASSERT(ppga != NULL);
1906 OBD_FREE(ppga, sizeof(*ppga) * count);
1909 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1910 obd_count page_count, struct brw_page *pga,
1911 struct obd_trans_info *oti)
1913 struct obdo *saved_oa = NULL;
1914 struct brw_page **ppga, **orig;
1915 struct obd_import *imp = class_exp2cliimp(exp);
1916 struct client_obd *cli;
1917 int rc, page_count_orig;
1920 LASSERT((imp != NULL) && (imp->imp_obd != NULL));
1921 cli = &imp->imp_obd->u.cli;
1923 if (cmd & OBD_BRW_CHECK) {
1924 /* The caller just wants to know if there's a chance that this
1925 * I/O can succeed */
1927 if (imp->imp_invalid)
1932 /* test_brw with a failed create can trip this, maybe others. */
1933 LASSERT(cli->cl_max_pages_per_rpc);
1937 orig = ppga = osc_build_ppga(pga, page_count);
1940 page_count_orig = page_count;
1942 sort_brw_pages(ppga, page_count);
1943 while (page_count) {
1944 obd_count pages_per_brw;
1946 if (page_count > cli->cl_max_pages_per_rpc)
1947 pages_per_brw = cli->cl_max_pages_per_rpc;
1949 pages_per_brw = page_count;
1951 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1953 if (saved_oa != NULL) {
1954 /* restore previously saved oa */
1955 *oinfo->oi_oa = *saved_oa;
1956 } else if (page_count > pages_per_brw) {
1957 /* save a copy of oa (brw will clobber it) */
1958 OBDO_ALLOC(saved_oa);
1959 if (saved_oa == NULL)
1960 GOTO(out, rc = -ENOMEM);
1961 *saved_oa = *oinfo->oi_oa;
1964 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1965 pages_per_brw, ppga, oinfo->oi_capa);
1970 page_count -= pages_per_brw;
1971 ppga += pages_per_brw;
1975 osc_release_ppga(orig, page_count_orig);
1977 if (saved_oa != NULL)
1978 OBDO_FREE(saved_oa);
1983 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1984 * the dirty accounting. Writeback completes or truncate happens before
1985 * writing starts. Must be called with the loi lock held. */
1986 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1989 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1993 /* This maintains the lists of pending pages to read/write for a given object
1994 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1995 * to quickly find objects that are ready to send an RPC. */
1996 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
2001 if (lop->lop_num_pending == 0)
2004 /* if we have an invalid import we want to drain the queued pages
2005 * by forcing them through rpcs that immediately fail and complete
2006 * the pages. recovery relies on this to empty the queued pages
2007 * before canceling the locks and evicting down the llite pages */
2008 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2011 /* stream rpcs in queue order as long as as there is an urgent page
2012 * queued. this is our cheap solution for good batching in the case
2013 * where writepage marks some random page in the middle of the file
2014 * as urgent because of, say, memory pressure */
2015 if (!cfs_list_empty(&lop->lop_urgent)) {
2016 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
2020 if (cmd & OBD_BRW_WRITE) {
2021 /* trigger a write rpc stream as long as there are dirtiers
2022 * waiting for space. as they're waiting, they're not going to
2023 * create more pages to coalesce with what's waiting.. */
2024 if (!cfs_list_empty(&cli->cl_cache_waiters)) {
2025 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
2029 if (lop->lop_num_pending >= cli->cl_max_pages_per_rpc)
2035 static int lop_makes_hprpc(struct loi_oap_pages *lop)
2037 struct osc_async_page *oap;
2040 if (cfs_list_empty(&lop->lop_urgent))
2043 oap = cfs_list_entry(lop->lop_urgent.next,
2044 struct osc_async_page, oap_urgent_item);
2046 if (oap->oap_async_flags & ASYNC_HP) {
2047 CDEBUG(D_CACHE, "hp request forcing RPC\n");
2054 static void on_list(cfs_list_t *item, cfs_list_t *list,
2057 if (cfs_list_empty(item) && should_be_on)
2058 cfs_list_add_tail(item, list);
2059 else if (!cfs_list_empty(item) && !should_be_on)
2060 cfs_list_del_init(item);
2063 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
2064 * can find pages to build into rpcs quickly */
2065 void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
2067 if (lop_makes_hprpc(&loi->loi_write_lop) ||
2068 lop_makes_hprpc(&loi->loi_read_lop)) {
2070 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list, 0);
2071 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 1);
2073 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 0);
2074 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list,
2075 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)||
2076 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
2079 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
2080 loi->loi_write_lop.lop_num_pending);
2082 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
2083 loi->loi_read_lop.lop_num_pending);
2086 static void lop_update_pending(struct client_obd *cli,
2087 struct loi_oap_pages *lop, int cmd, int delta)
2089 lop->lop_num_pending += delta;
2090 if (cmd & OBD_BRW_WRITE)
2091 cli->cl_pending_w_pages += delta;
2093 cli->cl_pending_r_pages += delta;
2097 * this is called when a sync waiter receives an interruption. Its job is to
2098 * get the caller woken as soon as possible. If its page hasn't been put in an
2099 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
2100 * desiring interruption which will forcefully complete the rpc once the rpc
2103 int osc_oap_interrupted(const struct lu_env *env, struct osc_async_page *oap)
2105 struct loi_oap_pages *lop;
2106 struct lov_oinfo *loi;
2110 LASSERT(!oap->oap_interrupted);
2111 oap->oap_interrupted = 1;
2113 /* ok, it's been put in an rpc. only one oap gets a request reference */
2114 if (oap->oap_request != NULL) {
2115 ptlrpc_mark_interrupted(oap->oap_request);
2116 ptlrpcd_wake(oap->oap_request);
2117 ptlrpc_req_finished(oap->oap_request);
2118 oap->oap_request = NULL;
2122 * page completion may be called only if ->cpo_prep() method was
2123 * executed by osc_io_submit(), that also adds page the to pending list
2125 if (!cfs_list_empty(&oap->oap_pending_item)) {
2126 cfs_list_del_init(&oap->oap_pending_item);
2127 cfs_list_del_init(&oap->oap_urgent_item);
2130 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
2131 &loi->loi_write_lop : &loi->loi_read_lop;
2132 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
2133 loi_list_maint(oap->oap_cli, oap->oap_loi);
2134 rc = oap->oap_caller_ops->ap_completion(env,
2135 oap->oap_caller_data,
2136 oap->oap_cmd, NULL, -EINTR);
2142 /* this is trying to propogate async writeback errors back up to the
2143 * application. As an async write fails we record the error code for later if
2144 * the app does an fsync. As long as errors persist we force future rpcs to be
2145 * sync so that the app can get a sync error and break the cycle of queueing
2146 * pages for which writeback will fail. */
2147 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
2154 ar->ar_force_sync = 1;
2155 ar->ar_min_xid = ptlrpc_sample_next_xid();
2160 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
2161 ar->ar_force_sync = 0;
2164 void osc_oap_to_pending(struct osc_async_page *oap)
2166 struct loi_oap_pages *lop;
2168 if (oap->oap_cmd & OBD_BRW_WRITE)
2169 lop = &oap->oap_loi->loi_write_lop;
2171 lop = &oap->oap_loi->loi_read_lop;
2173 if (oap->oap_async_flags & ASYNC_HP)
2174 cfs_list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2175 else if (oap->oap_async_flags & ASYNC_URGENT)
2176 cfs_list_add_tail(&oap->oap_urgent_item, &lop->lop_urgent);
2177 cfs_list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
2178 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
2181 /* this must be called holding the loi list lock to give coverage to exit_cache,
2182 * async_flag maintenance, and oap_request */
2183 static void osc_ap_completion(const struct lu_env *env,
2184 struct client_obd *cli, struct obdo *oa,
2185 struct osc_async_page *oap, int sent, int rc)
2190 if (oap->oap_request != NULL) {
2191 xid = ptlrpc_req_xid(oap->oap_request);
2192 ptlrpc_req_finished(oap->oap_request);
2193 oap->oap_request = NULL;
2196 cfs_spin_lock(&oap->oap_lock);
2197 oap->oap_async_flags = 0;
2198 cfs_spin_unlock(&oap->oap_lock);
2199 oap->oap_interrupted = 0;
2201 if (oap->oap_cmd & OBD_BRW_WRITE) {
2202 osc_process_ar(&cli->cl_ar, xid, rc);
2203 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
2206 if (rc == 0 && oa != NULL) {
2207 if (oa->o_valid & OBD_MD_FLBLOCKS)
2208 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
2209 if (oa->o_valid & OBD_MD_FLMTIME)
2210 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
2211 if (oa->o_valid & OBD_MD_FLATIME)
2212 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
2213 if (oa->o_valid & OBD_MD_FLCTIME)
2214 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
2217 rc = oap->oap_caller_ops->ap_completion(env, oap->oap_caller_data,
2218 oap->oap_cmd, oa, rc);
2220 /* cl_page_completion() drops PG_locked. so, a new I/O on the page could
2221 * start, but OSC calls it under lock and thus we can add oap back to
2224 /* upper layer wants to leave the page on pending queue */
2225 osc_oap_to_pending(oap);
2227 osc_exit_cache(cli, oap, sent);
2231 static int brw_queue_work(const struct lu_env *env, void *data)
2233 struct client_obd *cli = data;
2235 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
2237 client_obd_list_lock(&cli->cl_loi_list_lock);
2238 osc_check_rpcs0(env, cli, 1);
2239 client_obd_list_unlock(&cli->cl_loi_list_lock);
2243 static int brw_interpret(const struct lu_env *env,
2244 struct ptlrpc_request *req, void *data, int rc)
2246 struct osc_brw_async_args *aa = data;
2247 struct client_obd *cli;
2251 rc = osc_brw_fini_request(req, rc);
2252 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2253 /* When server return -EINPROGRESS, client should always retry
2254 * regardless of the number of times the bulk was resent already. */
2255 if (osc_recoverable_error(rc)) {
2256 if (req->rq_import_generation !=
2257 req->rq_import->imp_generation) {
2258 CDEBUG(D_HA, "%s: resend cross eviction for object: "
2259 ""LPU64":"LPU64", rc = %d.\n",
2260 req->rq_import->imp_obd->obd_name,
2261 aa->aa_oa->o_id, aa->aa_oa->o_seq, rc);
2262 } else if (rc == -EINPROGRESS ||
2263 client_should_resend(aa->aa_resends, aa->aa_cli)) {
2264 rc = osc_brw_redo_request(req, aa);
2266 CERROR("%s: too many resent retries for object: "
2267 ""LPU64":"LPU64", rc = %d.\n",
2268 req->rq_import->imp_obd->obd_name,
2269 aa->aa_oa->o_id, aa->aa_oa->o_seq, rc);
2274 else if (rc == -EAGAIN || rc == -EINPROGRESS)
2279 capa_put(aa->aa_ocapa);
2280 aa->aa_ocapa = NULL;
2284 client_obd_list_lock(&cli->cl_loi_list_lock);
2286 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2287 * is called so we know whether to go to sync BRWs or wait for more
2288 * RPCs to complete */
2289 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2290 cli->cl_w_in_flight--;
2292 cli->cl_r_in_flight--;
2294 async = cfs_list_empty(&aa->aa_oaps);
2295 if (!async) { /* from osc_send_oap_rpc() */
2296 struct osc_async_page *oap, *tmp;
2297 /* the caller may re-use the oap after the completion call so
2298 * we need to clean it up a little */
2299 cfs_list_for_each_entry_safe(oap, tmp, &aa->aa_oaps,
2301 cfs_list_del_init(&oap->oap_rpc_item);
2302 osc_ap_completion(env, cli, aa->aa_oa, oap, 1, rc);
2304 OBDO_FREE(aa->aa_oa);
2305 } else { /* from async_internal() */
2307 for (i = 0; i < aa->aa_page_count; i++)
2308 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
2310 osc_wake_cache_waiters(cli);
2311 osc_check_rpcs0(env, cli, 1);
2312 client_obd_list_unlock(&cli->cl_loi_list_lock);
2315 cl_req_completion(env, aa->aa_clerq, rc < 0 ? rc :
2316 req->rq_bulk->bd_nob_transferred);
2317 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2318 ptlrpc_lprocfs_brw(req, req->rq_bulk->bd_nob_transferred);
2323 static struct ptlrpc_request *osc_build_req(const struct lu_env *env,
2324 struct client_obd *cli,
2325 cfs_list_t *rpc_list,
2326 int page_count, int cmd)
2328 struct ptlrpc_request *req;
2329 struct brw_page **pga = NULL;
2330 struct osc_brw_async_args *aa;
2331 struct obdo *oa = NULL;
2332 const struct obd_async_page_ops *ops = NULL;
2333 struct osc_async_page *oap;
2334 struct osc_async_page *tmp;
2335 struct cl_req *clerq = NULL;
2336 enum cl_req_type crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2337 struct ldlm_lock *lock = NULL;
2338 struct cl_req_attr crattr;
2339 int i, rc, mpflag = 0;
2342 LASSERT(!cfs_list_empty(rpc_list));
2344 if (cmd & OBD_BRW_MEMALLOC)
2345 mpflag = cfs_memory_pressure_get_and_set();
2347 memset(&crattr, 0, sizeof crattr);
2348 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2350 GOTO(out, req = ERR_PTR(-ENOMEM));
2354 GOTO(out, req = ERR_PTR(-ENOMEM));
2357 cfs_list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2358 struct cl_page *page = osc_oap2cl_page(oap);
2360 ops = oap->oap_caller_ops;
2362 clerq = cl_req_alloc(env, page, crt,
2363 1 /* only 1-object rpcs for
2366 GOTO(out, req = (void *)clerq);
2367 lock = oap->oap_ldlm_lock;
2369 pga[i] = &oap->oap_brw_page;
2370 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2371 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2372 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2374 cl_req_page_add(env, clerq, page);
2377 /* always get the data for the obdo for the rpc */
2378 LASSERT(ops != NULL);
2380 crattr.cra_capa = NULL;
2381 cl_req_attr_set(env, clerq, &crattr, ~0ULL);
2383 oa->o_handle = lock->l_remote_handle;
2384 oa->o_valid |= OBD_MD_FLHANDLE;
2387 rc = cl_req_prep(env, clerq);
2389 CERROR("cl_req_prep failed: %d\n", rc);
2390 GOTO(out, req = ERR_PTR(rc));
2393 sort_brw_pages(pga, page_count);
2394 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2395 pga, &req, crattr.cra_capa, 1, 0);
2397 CERROR("prep_req failed: %d\n", rc);
2398 GOTO(out, req = ERR_PTR(rc));
2401 if (cmd & OBD_BRW_MEMALLOC)
2402 req->rq_memalloc = 1;
2404 /* Need to update the timestamps after the request is built in case
2405 * we race with setattr (locally or in queue at OST). If OST gets
2406 * later setattr before earlier BRW (as determined by the request xid),
2407 * the OST will not use BRW timestamps. Sadly, there is no obvious
2408 * way to do this in a single call. bug 10150 */
2409 cl_req_attr_set(env, clerq, &crattr,
2410 OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
2412 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2413 aa = ptlrpc_req_async_args(req);
2414 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
2415 cfs_list_splice(rpc_list, &aa->aa_oaps);
2416 CFS_INIT_LIST_HEAD(rpc_list);
2417 aa->aa_clerq = clerq;
2419 if (cmd & OBD_BRW_MEMALLOC)
2420 cfs_memory_pressure_restore(mpflag);
2422 capa_put(crattr.cra_capa);
2427 OBD_FREE(pga, sizeof(*pga) * page_count);
2428 /* this should happen rarely and is pretty bad, it makes the
2429 * pending list not follow the dirty order */
2430 client_obd_list_lock(&cli->cl_loi_list_lock);
2431 cfs_list_for_each_entry_safe(oap, tmp, rpc_list, oap_rpc_item) {
2432 cfs_list_del_init(&oap->oap_rpc_item);
2434 /* queued sync pages can be torn down while the pages
2435 * were between the pending list and the rpc */
2436 if (oap->oap_interrupted) {
2437 CDEBUG(D_INODE, "oap %p interrupted\n", oap);
2438 osc_ap_completion(env, cli, NULL, oap, 0,
2442 osc_ap_completion(env, cli, NULL, oap, 0, PTR_ERR(req));
2444 if (clerq && !IS_ERR(clerq))
2445 cl_req_completion(env, clerq, PTR_ERR(req));
2451 * prepare pages for ASYNC io and put pages in send queue.
2453 * \param cmd OBD_BRW_* macroses
2454 * \param lop pending pages
2456 * \return zero if no page added to send queue.
2457 * \return 1 if pages successfully added to send queue.
2458 * \return negative on errors.
2461 osc_send_oap_rpc(const struct lu_env *env, struct client_obd *cli,
2462 struct lov_oinfo *loi, int cmd,
2463 struct loi_oap_pages *lop, pdl_policy_t pol)
2465 struct ptlrpc_request *req;
2466 obd_count page_count = 0;
2467 struct osc_async_page *oap = NULL, *tmp;
2468 struct osc_brw_async_args *aa;
2469 const struct obd_async_page_ops *ops;
2470 CFS_LIST_HEAD(rpc_list);
2471 int srvlock = 0, mem_tight = 0;
2472 struct cl_object *clob = NULL;
2473 obd_off starting_offset = OBD_OBJECT_EOF;
2474 unsigned int ending_offset;
2475 int starting_page_off = 0;
2478 /* ASYNC_HP pages first. At present, when the lock the pages is
2479 * to be canceled, the pages covered by the lock will be sent out
2480 * with ASYNC_HP. We have to send out them as soon as possible. */
2481 cfs_list_for_each_entry_safe(oap, tmp, &lop->lop_urgent, oap_urgent_item) {
2482 if (oap->oap_async_flags & ASYNC_HP)
2483 cfs_list_move(&oap->oap_pending_item, &rpc_list);
2484 else if (!(oap->oap_brw_flags & OBD_BRW_SYNC))
2485 /* only do this for writeback pages. */
2486 cfs_list_move_tail(&oap->oap_pending_item, &rpc_list);
2487 if (++page_count >= cli->cl_max_pages_per_rpc)
2490 cfs_list_splice_init(&rpc_list, &lop->lop_pending);
2493 /* first we find the pages we're allowed to work with */
2494 cfs_list_for_each_entry_safe(oap, tmp, &lop->lop_pending,
2496 ops = oap->oap_caller_ops;
2498 LASSERTF(oap->oap_magic == OAP_MAGIC, "Bad oap magic: oap %p, "
2499 "magic 0x%x\n", oap, oap->oap_magic);
2502 /* pin object in memory, so that completion call-backs
2503 * can be safely called under client_obd_list lock. */
2504 clob = osc_oap2cl_page(oap)->cp_obj;
2505 cl_object_get(clob);
2508 if (page_count != 0 &&
2509 srvlock != !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK)) {
2510 CDEBUG(D_PAGE, "SRVLOCK flag mismatch,"
2511 " oap %p, page %p, srvlock %u\n",
2512 oap, oap->oap_brw_page.pg, (unsigned)!srvlock);
2516 /* If there is a gap at the start of this page, it can't merge
2517 * with any previous page, so we'll hand the network a
2518 * "fragmented" page array that it can't transfer in 1 RDMA */
2519 if (oap->oap_obj_off < starting_offset) {
2520 if (starting_page_off != 0)
2523 starting_page_off = oap->oap_page_off;
2524 starting_offset = oap->oap_obj_off + starting_page_off;
2525 } else if (oap->oap_page_off != 0)
2528 /* in llite being 'ready' equates to the page being locked
2529 * until completion unlocks it. commit_write submits a page
2530 * as not ready because its unlock will happen unconditionally
2531 * as the call returns. if we race with commit_write giving
2532 * us that page we don't want to create a hole in the page
2533 * stream, so we stop and leave the rpc to be fired by
2534 * another dirtier or kupdated interval (the not ready page
2535 * will still be on the dirty list). we could call in
2536 * at the end of ll_file_write to process the queue again. */
2537 if (!(oap->oap_async_flags & ASYNC_READY)) {
2538 int rc = ops->ap_make_ready(env, oap->oap_caller_data,
2541 CDEBUG(D_INODE, "oap %p page %p returned %d "
2542 "instead of ready\n", oap,
2546 /* llite is telling us that the page is still
2547 * in commit_write and that we should try
2548 * and put it in an rpc again later. we
2549 * break out of the loop so we don't create
2550 * a hole in the sequence of pages in the rpc
2555 /* the io isn't needed.. tell the checks
2556 * below to complete the rpc with EINTR */
2557 cfs_spin_lock(&oap->oap_lock);
2558 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2559 cfs_spin_unlock(&oap->oap_lock);
2560 oap->oap_count = -EINTR;
2563 cfs_spin_lock(&oap->oap_lock);
2564 oap->oap_async_flags |= ASYNC_READY;
2565 cfs_spin_unlock(&oap->oap_lock);
2568 LASSERTF(0, "oap %p page %p returned %d "
2569 "from make_ready\n", oap,
2577 /* take the page out of our book-keeping */
2578 cfs_list_del_init(&oap->oap_pending_item);
2579 lop_update_pending(cli, lop, cmd, -1);
2580 cfs_list_del_init(&oap->oap_urgent_item);
2582 /* ask the caller for the size of the io as the rpc leaves. */
2583 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE)) {
2585 ops->ap_refresh_count(env, oap->oap_caller_data,
2587 LASSERT(oap->oap_page_off + oap->oap_count <= CFS_PAGE_SIZE);
2589 if (oap->oap_count <= 0) {
2590 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2592 osc_ap_completion(env, cli, NULL,
2593 oap, 0, oap->oap_count);
2597 /* now put the page back in our accounting */
2598 cfs_list_add_tail(&oap->oap_rpc_item, &rpc_list);
2599 if (page_count++ == 0)
2600 srvlock = !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK);
2602 if (oap->oap_brw_flags & OBD_BRW_MEMALLOC)
2605 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2606 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2607 * have the same alignment as the initial writes that allocated
2608 * extents on the server. */
2609 ending_offset = oap->oap_obj_off + oap->oap_page_off +
2611 if (!(ending_offset & (PTLRPC_MAX_BRW_SIZE - 1)))
2614 if (page_count >= cli->cl_max_pages_per_rpc)
2617 /* If there is a gap at the end of this page, it can't merge
2618 * with any subsequent pages, so we'll hand the network a
2619 * "fragmented" page array that it can't transfer in 1 RDMA */
2620 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2624 loi_list_maint(cli, loi);
2626 client_obd_list_unlock(&cli->cl_loi_list_lock);
2629 cl_object_put(env, clob);
2631 if (page_count == 0) {
2632 client_obd_list_lock(&cli->cl_loi_list_lock);
2636 req = osc_build_req(env, cli, &rpc_list, page_count,
2637 mem_tight ? (cmd | OBD_BRW_MEMALLOC) : cmd);
2639 LASSERT(cfs_list_empty(&rpc_list));
2640 loi_list_maint(cli, loi);
2641 RETURN(PTR_ERR(req));
2644 aa = ptlrpc_req_async_args(req);
2646 starting_offset &= PTLRPC_MAX_BRW_SIZE - 1;
2647 if (cmd == OBD_BRW_READ) {
2648 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2649 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2650 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2651 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2653 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2654 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2655 cli->cl_w_in_flight);
2656 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2657 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2660 client_obd_list_lock(&cli->cl_loi_list_lock);
2662 if (cmd == OBD_BRW_READ)
2663 cli->cl_r_in_flight++;
2665 cli->cl_w_in_flight++;
2667 /* queued sync pages can be torn down while the pages
2668 * were between the pending list and the rpc */
2670 cfs_list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2671 /* only one oap gets a request reference */
2674 if (oap->oap_interrupted && !req->rq_intr) {
2675 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2677 ptlrpc_mark_interrupted(req);
2681 tmp->oap_request = ptlrpc_request_addref(req);
2683 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2684 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2686 req->rq_interpret_reply = brw_interpret;
2688 /* XXX: Maybe the caller can check the RPC bulk descriptor to see which
2689 * CPU/NUMA node the majority of pages were allocated on, and try
2690 * to assign the async RPC to the CPU core (PDL_POLICY_PREFERRED)
2691 * to reduce cross-CPU memory traffic.
2693 * But on the other hand, we expect that multiple ptlrpcd threads
2694 * and the initial write sponsor can run in parallel, especially
2695 * when data checksum is enabled, which is CPU-bound operation and
2696 * single ptlrpcd thread cannot process in time. So more ptlrpcd
2697 * threads sharing BRW load (with PDL_POLICY_ROUND) seems better.
2699 ptlrpcd_add_req(req, pol, -1);
2703 #define LOI_DEBUG(LOI, STR, args...) \
2704 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2705 !cfs_list_empty(&(LOI)->loi_ready_item) || \
2706 !cfs_list_empty(&(LOI)->loi_hp_ready_item), \
2707 (LOI)->loi_write_lop.lop_num_pending, \
2708 !cfs_list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2709 (LOI)->loi_read_lop.lop_num_pending, \
2710 !cfs_list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2713 /* This is called by osc_check_rpcs() to find which objects have pages that
2714 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2715 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2719 /* First return objects that have blocked locks so that they
2720 * will be flushed quickly and other clients can get the lock,
2721 * then objects which have pages ready to be stuffed into RPCs */
2722 if (!cfs_list_empty(&cli->cl_loi_hp_ready_list))
2723 RETURN(cfs_list_entry(cli->cl_loi_hp_ready_list.next,
2724 struct lov_oinfo, loi_hp_ready_item));
2725 if (!cfs_list_empty(&cli->cl_loi_ready_list))
2726 RETURN(cfs_list_entry(cli->cl_loi_ready_list.next,
2727 struct lov_oinfo, loi_ready_item));
2729 /* then if we have cache waiters, return all objects with queued
2730 * writes. This is especially important when many small files
2731 * have filled up the cache and not been fired into rpcs because
2732 * they don't pass the nr_pending/object threshhold */
2733 if (!cfs_list_empty(&cli->cl_cache_waiters) &&
2734 !cfs_list_empty(&cli->cl_loi_write_list))
2735 RETURN(cfs_list_entry(cli->cl_loi_write_list.next,
2736 struct lov_oinfo, loi_write_item));
2738 /* then return all queued objects when we have an invalid import
2739 * so that they get flushed */
2740 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2741 if (!cfs_list_empty(&cli->cl_loi_write_list))
2742 RETURN(cfs_list_entry(cli->cl_loi_write_list.next,
2745 if (!cfs_list_empty(&cli->cl_loi_read_list))
2746 RETURN(cfs_list_entry(cli->cl_loi_read_list.next,
2747 struct lov_oinfo, loi_read_item));
2752 static int osc_max_rpc_in_flight(struct client_obd *cli, struct lov_oinfo *loi)
2754 struct osc_async_page *oap;
2757 if (!cfs_list_empty(&loi->loi_write_lop.lop_urgent)) {
2758 oap = cfs_list_entry(loi->loi_write_lop.lop_urgent.next,
2759 struct osc_async_page, oap_urgent_item);
2760 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2763 if (!hprpc && !cfs_list_empty(&loi->loi_read_lop.lop_urgent)) {
2764 oap = cfs_list_entry(loi->loi_read_lop.lop_urgent.next,
2765 struct osc_async_page, oap_urgent_item);
2766 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2769 return rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight + hprpc;
2772 /* called with the loi list lock held */
2773 static void osc_check_rpcs0(const struct lu_env *env, struct client_obd *cli, int ptlrpc)
2775 struct lov_oinfo *loi;
2776 int rc = 0, race_counter = 0;
2780 pol = ptlrpc ? PDL_POLICY_SAME : PDL_POLICY_ROUND;
2782 while ((loi = osc_next_loi(cli)) != NULL) {
2783 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2785 if (osc_max_rpc_in_flight(cli, loi))
2788 /* attempt some read/write balancing by alternating between
2789 * reads and writes in an object. The makes_rpc checks here
2790 * would be redundant if we were getting read/write work items
2791 * instead of objects. we don't want send_oap_rpc to drain a
2792 * partial read pending queue when we're given this object to
2793 * do io on writes while there are cache waiters */
2794 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2795 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_WRITE,
2796 &loi->loi_write_lop, pol);
2798 CERROR("Write request failed with %d\n", rc);
2800 /* osc_send_oap_rpc failed, mostly because of
2803 * It can't break here, because if:
2804 * - a page was submitted by osc_io_submit, so
2806 * - no request in flight
2807 * - no subsequent request
2808 * The system will be in live-lock state,
2809 * because there is no chance to call
2810 * osc_io_unplug() and osc_check_rpcs() any
2811 * more. pdflush can't help in this case,
2812 * because it might be blocked at grabbing
2813 * the page lock as we mentioned.
2815 * Anyway, continue to drain pages. */
2824 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2825 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_READ,
2826 &loi->loi_read_lop, pol);
2828 CERROR("Read request failed with %d\n", rc);
2836 /* attempt some inter-object balancing by issuing rpcs
2837 * for each object in turn */
2838 if (!cfs_list_empty(&loi->loi_hp_ready_item))
2839 cfs_list_del_init(&loi->loi_hp_ready_item);
2840 if (!cfs_list_empty(&loi->loi_ready_item))
2841 cfs_list_del_init(&loi->loi_ready_item);
2842 if (!cfs_list_empty(&loi->loi_write_item))
2843 cfs_list_del_init(&loi->loi_write_item);
2844 if (!cfs_list_empty(&loi->loi_read_item))
2845 cfs_list_del_init(&loi->loi_read_item);
2847 loi_list_maint(cli, loi);
2849 /* send_oap_rpc fails with 0 when make_ready tells it to
2850 * back off. llite's make_ready does this when it tries
2851 * to lock a page queued for write that is already locked.
2852 * we want to try sending rpcs from many objects, but we
2853 * don't want to spin failing with 0. */
2854 if (race_counter == 10)
2859 void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli)
2861 osc_check_rpcs0(env, cli, 0);
2865 * Non-blocking version of osc_enter_cache() that consumes grant only when it
2868 int osc_enter_cache_try(const struct lu_env *env,
2869 struct client_obd *cli, struct lov_oinfo *loi,
2870 struct osc_async_page *oap, int transient)
2874 has_grant = cli->cl_avail_grant >= CFS_PAGE_SIZE;
2876 osc_consume_write_grant(cli, &oap->oap_brw_page);
2878 cli->cl_dirty_transit += CFS_PAGE_SIZE;
2879 cfs_atomic_inc(&obd_dirty_transit_pages);
2880 oap->oap_brw_flags |= OBD_BRW_NOCACHE;
2886 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2887 * grant or cache space. */
2888 static int osc_enter_cache(const struct lu_env *env,
2889 struct client_obd *cli, struct lov_oinfo *loi,
2890 struct osc_async_page *oap)
2892 struct osc_cache_waiter ocw;
2893 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
2897 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2898 "grant: %lu\n", cli->cl_dirty, cfs_atomic_read(&obd_dirty_pages),
2899 cli->cl_dirty_max, obd_max_dirty_pages,
2900 cli->cl_lost_grant, cli->cl_avail_grant);
2902 /* force the caller to try sync io. this can jump the list
2903 * of queued writes and create a discontiguous rpc stream */
2904 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_NO_GRANT) ||
2905 cli->cl_dirty_max < CFS_PAGE_SIZE ||
2906 cli->cl_ar.ar_force_sync || loi->loi_ar.ar_force_sync)
2909 /* Hopefully normal case - cache space and write credits available */
2910 if (cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max &&
2911 cfs_atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages &&
2912 osc_enter_cache_try(env, cli, loi, oap, 0))
2915 /* We can get here for two reasons: too many dirty pages in cache, or
2916 * run out of grants. In both cases we should write dirty pages out.
2917 * Adding a cache waiter will trigger urgent write-out no matter what
2919 * The exiting condition is no avail grants and no dirty pages caching,
2920 * that really means there is no space on the OST. */
2921 cfs_waitq_init(&ocw.ocw_waitq);
2923 while (cli->cl_dirty > 0) {
2924 cfs_list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2927 loi_list_maint(cli, loi);
2928 osc_check_rpcs(env, cli);
2929 client_obd_list_unlock(&cli->cl_loi_list_lock);
2931 CDEBUG(D_CACHE, "%s: sleeping for cache space @ %p for %p\n",
2932 cli->cl_import->imp_obd->obd_name, &ocw, oap);
2934 rc = l_wait_event(ocw.ocw_waitq, cfs_list_empty(&ocw.ocw_entry), &lwi);
2936 client_obd_list_lock(&cli->cl_loi_list_lock);
2937 cfs_list_del_init(&ocw.ocw_entry);
2950 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2951 struct lov_oinfo *loi, cfs_page_t *page,
2952 obd_off offset, const struct obd_async_page_ops *ops,
2953 void *data, void **res, int nocache,
2954 struct lustre_handle *lockh)
2956 struct osc_async_page *oap;
2961 return cfs_size_round(sizeof(*oap));
2964 oap->oap_magic = OAP_MAGIC;
2965 oap->oap_cli = &exp->exp_obd->u.cli;
2968 oap->oap_caller_ops = ops;
2969 oap->oap_caller_data = data;
2971 oap->oap_page = page;
2972 oap->oap_obj_off = offset;
2973 if (!client_is_remote(exp) &&
2974 cfs_capable(CFS_CAP_SYS_RESOURCE))
2975 oap->oap_brw_flags = OBD_BRW_NOQUOTA;
2977 LASSERT(!(offset & ~CFS_PAGE_MASK));
2979 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2980 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2981 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2982 CFS_INIT_LIST_HEAD(&oap->oap_page_list);
2984 cfs_spin_lock_init(&oap->oap_lock);
2985 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2989 int osc_queue_async_io(const struct lu_env *env, struct obd_export *exp,
2990 struct lov_stripe_md *lsm, struct lov_oinfo *loi,
2991 struct osc_async_page *oap, int cmd, int off,
2992 int count, obd_flag brw_flags, enum async_flags async_flags)
2994 struct client_obd *cli = &exp->exp_obd->u.cli;
2998 if (oap->oap_magic != OAP_MAGIC)
3001 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
3004 if (!cfs_list_empty(&oap->oap_pending_item) ||
3005 !cfs_list_empty(&oap->oap_urgent_item) ||
3006 !cfs_list_empty(&oap->oap_rpc_item))
3009 /* check if the file's owner/group is over quota */
3010 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)) {
3011 struct cl_object *obj;
3012 struct cl_attr attr; /* XXX put attr into thread info */
3013 unsigned int qid[MAXQUOTAS];
3015 obj = cl_object_top(osc_oap2cl_page(oap)->cp_obj);
3017 cl_object_attr_lock(obj);
3018 rc = cl_object_attr_get(env, obj, &attr);
3019 cl_object_attr_unlock(obj);
3021 qid[USRQUOTA] = attr.cat_uid;
3022 qid[GRPQUOTA] = attr.cat_gid;
3024 osc_quota_chkdq(cli, qid) == NO_QUOTA)
3031 loi = lsm->lsm_oinfo[0];
3033 client_obd_list_lock(&cli->cl_loi_list_lock);
3035 LASSERT(off + count <= CFS_PAGE_SIZE);
3037 oap->oap_page_off = off;
3038 oap->oap_count = count;
3039 oap->oap_brw_flags = brw_flags;
3040 /* Give a hint to OST that requests are coming from kswapd - bug19529 */
3041 if (cfs_memory_pressure_get())
3042 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
3043 cfs_spin_lock(&oap->oap_lock);
3044 oap->oap_async_flags = async_flags;
3045 cfs_spin_unlock(&oap->oap_lock);
3047 if (cmd & OBD_BRW_WRITE) {
3048 rc = osc_enter_cache(env, cli, loi, oap);
3050 client_obd_list_unlock(&cli->cl_loi_list_lock);
3055 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
3058 osc_oap_to_pending(oap);
3059 loi_list_maint(cli, loi);
3060 if (!osc_max_rpc_in_flight(cli, loi) &&
3061 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
3062 LASSERT(cli->cl_writeback_work != NULL);
3063 rc = ptlrpcd_queue_work(cli->cl_writeback_work);
3065 CDEBUG(D_CACHE, "Queued writeback work for client obd %p/%d.\n",
3068 client_obd_list_unlock(&cli->cl_loi_list_lock);
3073 /* aka (~was & now & flag), but this is more clear :) */
3074 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
3076 int osc_set_async_flags_base(struct client_obd *cli,
3077 struct lov_oinfo *loi, struct osc_async_page *oap,
3078 obd_flag async_flags)
3080 struct loi_oap_pages *lop;
3084 LASSERT(!cfs_list_empty(&oap->oap_pending_item));
3086 if (oap->oap_cmd & OBD_BRW_WRITE) {
3087 lop = &loi->loi_write_lop;
3089 lop = &loi->loi_read_lop;
3092 if ((oap->oap_async_flags & async_flags) == async_flags)
3095 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
3096 flags |= ASYNC_READY;
3098 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT) &&
3099 cfs_list_empty(&oap->oap_rpc_item)) {
3100 if (oap->oap_async_flags & ASYNC_HP)
3101 cfs_list_add(&oap->oap_urgent_item, &lop->lop_urgent);
3103 cfs_list_add_tail(&oap->oap_urgent_item,
3105 flags |= ASYNC_URGENT;
3106 loi_list_maint(cli, loi);
3108 cfs_spin_lock(&oap->oap_lock);
3109 oap->oap_async_flags |= flags;
3110 cfs_spin_unlock(&oap->oap_lock);
3112 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
3113 oap->oap_async_flags);
3117 int osc_teardown_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
3118 struct lov_oinfo *loi, struct osc_async_page *oap)
3120 struct client_obd *cli = &exp->exp_obd->u.cli;
3121 struct loi_oap_pages *lop;
3125 if (oap->oap_magic != OAP_MAGIC)
3129 loi = lsm->lsm_oinfo[0];
3131 if (oap->oap_cmd & OBD_BRW_WRITE) {
3132 lop = &loi->loi_write_lop;
3134 lop = &loi->loi_read_lop;
3137 client_obd_list_lock(&cli->cl_loi_list_lock);
3139 if (!cfs_list_empty(&oap->oap_rpc_item))
3140 GOTO(out, rc = -EBUSY);
3142 osc_exit_cache(cli, oap, 0);
3143 osc_wake_cache_waiters(cli);
3145 if (!cfs_list_empty(&oap->oap_urgent_item)) {
3146 cfs_list_del_init(&oap->oap_urgent_item);
3147 cfs_spin_lock(&oap->oap_lock);
3148 oap->oap_async_flags &= ~(ASYNC_URGENT | ASYNC_HP);
3149 cfs_spin_unlock(&oap->oap_lock);
3151 if (!cfs_list_empty(&oap->oap_pending_item)) {
3152 cfs_list_del_init(&oap->oap_pending_item);
3153 lop_update_pending(cli, lop, oap->oap_cmd, -1);
3155 loi_list_maint(cli, loi);
3156 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
3158 client_obd_list_unlock(&cli->cl_loi_list_lock);
3162 static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
3163 struct ldlm_enqueue_info *einfo)
3165 void *data = einfo->ei_cbdata;
3168 LASSERT(lock != NULL);
3169 LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
3170 LASSERT(lock->l_resource->lr_type == einfo->ei_type);
3171 LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
3172 LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
3174 lock_res_and_lock(lock);
3175 cfs_spin_lock(&osc_ast_guard);
3177 if (lock->l_ast_data == NULL)
3178 lock->l_ast_data = data;
3179 if (lock->l_ast_data == data)
3182 cfs_spin_unlock(&osc_ast_guard);
3183 unlock_res_and_lock(lock);
3188 static int osc_set_data_with_check(struct lustre_handle *lockh,
3189 struct ldlm_enqueue_info *einfo)
3191 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
3195 set = osc_set_lock_data_with_check(lock, einfo);
3196 LDLM_LOCK_PUT(lock);
3198 CERROR("lockh %p, data %p - client evicted?\n",
3199 lockh, einfo->ei_cbdata);
3203 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3204 ldlm_iterator_t replace, void *data)
3206 struct ldlm_res_id res_id;
3207 struct obd_device *obd = class_exp2obd(exp);
3209 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_seq, &res_id);
3210 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3214 /* find any ldlm lock of the inode in osc
3218 static int osc_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3219 ldlm_iterator_t replace, void *data)
3221 struct ldlm_res_id res_id;
3222 struct obd_device *obd = class_exp2obd(exp);
3225 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_seq, &res_id);
3226 rc = ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3227 if (rc == LDLM_ITER_STOP)
3229 if (rc == LDLM_ITER_CONTINUE)
3234 static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
3235 obd_enqueue_update_f upcall, void *cookie,
3236 int *flags, int agl, int rc)
3238 int intent = *flags & LDLM_FL_HAS_INTENT;
3242 /* The request was created before ldlm_cli_enqueue call. */
3243 if (rc == ELDLM_LOCK_ABORTED) {
3244 struct ldlm_reply *rep;
3245 rep = req_capsule_server_get(&req->rq_pill,
3248 LASSERT(rep != NULL);
3249 if (rep->lock_policy_res1)
3250 rc = rep->lock_policy_res1;
3254 if ((intent != 0 && rc == ELDLM_LOCK_ABORTED && agl == 0) ||
3256 *flags |= LDLM_FL_LVB_READY;
3257 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
3258 lvb->lvb_size, lvb->lvb_blocks, lvb->lvb_mtime);
3261 /* Call the update callback. */
3262 rc = (*upcall)(cookie, rc);
3266 static int osc_enqueue_interpret(const struct lu_env *env,
3267 struct ptlrpc_request *req,
3268 struct osc_enqueue_args *aa, int rc)
3270 struct ldlm_lock *lock;
3271 struct lustre_handle handle;
3273 struct ost_lvb *lvb;
3275 int *flags = aa->oa_flags;
3277 /* Make a local copy of a lock handle and a mode, because aa->oa_*
3278 * might be freed anytime after lock upcall has been called. */
3279 lustre_handle_copy(&handle, aa->oa_lockh);
3280 mode = aa->oa_ei->ei_mode;
3282 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
3284 lock = ldlm_handle2lock(&handle);
3286 /* Take an additional reference so that a blocking AST that
3287 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
3288 * to arrive after an upcall has been executed by
3289 * osc_enqueue_fini(). */
3290 ldlm_lock_addref(&handle, mode);
3292 /* Let CP AST to grant the lock first. */
3293 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
3295 if (aa->oa_agl && rc == ELDLM_LOCK_ABORTED) {
3300 lvb_len = sizeof(*aa->oa_lvb);
3303 /* Complete obtaining the lock procedure. */
3304 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
3305 mode, flags, lvb, lvb_len, &handle, rc);
3306 /* Complete osc stuff. */
3307 rc = osc_enqueue_fini(req, aa->oa_lvb, aa->oa_upcall, aa->oa_cookie,
3308 flags, aa->oa_agl, rc);
3310 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
3312 /* Release the lock for async request. */
3313 if (lustre_handle_is_used(&handle) && rc == ELDLM_OK)
3315 * Releases a reference taken by ldlm_cli_enqueue(), if it is
3316 * not already released by
3317 * ldlm_cli_enqueue_fini()->failed_lock_cleanup()
3319 ldlm_lock_decref(&handle, mode);
3321 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
3322 aa->oa_lockh, req, aa);
3323 ldlm_lock_decref(&handle, mode);
3324 LDLM_LOCK_PUT(lock);
3328 void osc_update_enqueue(struct lustre_handle *lov_lockhp,
3329 struct lov_oinfo *loi, int flags,
3330 struct ost_lvb *lvb, __u32 mode, int rc)
3332 struct ldlm_lock *lock = ldlm_handle2lock(lov_lockhp);
3334 if (rc == ELDLM_OK) {
3337 LASSERT(lock != NULL);
3338 loi->loi_lvb = *lvb;
3339 tmp = loi->loi_lvb.lvb_size;
3340 /* Extend KMS up to the end of this lock and no further
3341 * A lock on [x,y] means a KMS of up to y + 1 bytes! */
3342 if (tmp > lock->l_policy_data.l_extent.end)
3343 tmp = lock->l_policy_data.l_extent.end + 1;
3344 if (tmp >= loi->loi_kms) {
3345 LDLM_DEBUG(lock, "lock acquired, setting rss="LPU64
3346 ", kms="LPU64, loi->loi_lvb.lvb_size, tmp);
3347 loi_kms_set(loi, tmp);
3349 LDLM_DEBUG(lock, "lock acquired, setting rss="
3350 LPU64"; leaving kms="LPU64", end="LPU64,
3351 loi->loi_lvb.lvb_size, loi->loi_kms,
3352 lock->l_policy_data.l_extent.end);
3354 ldlm_lock_allow_match(lock);
3355 } else if (rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT)) {
3356 LASSERT(lock != NULL);
3357 loi->loi_lvb = *lvb;
3358 ldlm_lock_allow_match(lock);
3359 CDEBUG(D_INODE, "glimpsed, setting rss="LPU64"; leaving"
3360 " kms="LPU64"\n", loi->loi_lvb.lvb_size, loi->loi_kms);
3366 ldlm_lock_fail_match(lock);
3368 LDLM_LOCK_PUT(lock);
3371 EXPORT_SYMBOL(osc_update_enqueue);
3373 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
3375 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
3376 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
3377 * other synchronous requests, however keeping some locks and trying to obtain
3378 * others may take a considerable amount of time in a case of ost failure; and
3379 * when other sync requests do not get released lock from a client, the client
3380 * is excluded from the cluster -- such scenarious make the life difficult, so
3381 * release locks just after they are obtained. */
3382 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3383 int *flags, ldlm_policy_data_t *policy,
3384 struct ost_lvb *lvb, int kms_valid,
3385 obd_enqueue_update_f upcall, void *cookie,
3386 struct ldlm_enqueue_info *einfo,
3387 struct lustre_handle *lockh,
3388 struct ptlrpc_request_set *rqset, int async, int agl)
3390 struct obd_device *obd = exp->exp_obd;
3391 struct ptlrpc_request *req = NULL;
3392 int intent = *flags & LDLM_FL_HAS_INTENT;
3393 int match_lvb = (agl != 0 ? 0 : LDLM_FL_LVB_READY);
3398 /* Filesystem lock extents are extended to page boundaries so that
3399 * dealing with the page cache is a little smoother. */
3400 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3401 policy->l_extent.end |= ~CFS_PAGE_MASK;
3404 * kms is not valid when either object is completely fresh (so that no
3405 * locks are cached), or object was evicted. In the latter case cached
3406 * lock cannot be used, because it would prime inode state with
3407 * potentially stale LVB.
3412 /* Next, search for already existing extent locks that will cover us */
3413 /* If we're trying to read, we also search for an existing PW lock. The
3414 * VFS and page cache already protect us locally, so lots of readers/
3415 * writers can share a single PW lock.
3417 * There are problems with conversion deadlocks, so instead of
3418 * converting a read lock to a write lock, we'll just enqueue a new
3421 * At some point we should cancel the read lock instead of making them
3422 * send us a blocking callback, but there are problems with canceling
3423 * locks out from other users right now, too. */
3424 mode = einfo->ei_mode;
3425 if (einfo->ei_mode == LCK_PR)
3427 mode = ldlm_lock_match(obd->obd_namespace, *flags | match_lvb, res_id,
3428 einfo->ei_type, policy, mode, lockh, 0);
3430 struct ldlm_lock *matched = ldlm_handle2lock(lockh);
3432 if ((agl != 0) && !(matched->l_flags & LDLM_FL_LVB_READY)) {
3433 /* For AGL, if enqueue RPC is sent but the lock is not
3434 * granted, then skip to process this strpe.
3435 * Return -ECANCELED to tell the caller. */
3436 ldlm_lock_decref(lockh, mode);
3437 LDLM_LOCK_PUT(matched);
3439 } else if (osc_set_lock_data_with_check(matched, einfo)) {
3440 *flags |= LDLM_FL_LVB_READY;
3441 /* addref the lock only if not async requests and PW
3442 * lock is matched whereas we asked for PR. */
3443 if (!rqset && einfo->ei_mode != mode)
3444 ldlm_lock_addref(lockh, LCK_PR);
3446 /* I would like to be able to ASSERT here that
3447 * rss <= kms, but I can't, for reasons which
3448 * are explained in lov_enqueue() */
3451 /* We already have a lock, and it's referenced */
3452 (*upcall)(cookie, ELDLM_OK);
3454 if (einfo->ei_mode != mode)
3455 ldlm_lock_decref(lockh, LCK_PW);
3457 /* For async requests, decref the lock. */
3458 ldlm_lock_decref(lockh, einfo->ei_mode);
3459 LDLM_LOCK_PUT(matched);
3462 ldlm_lock_decref(lockh, mode);
3463 LDLM_LOCK_PUT(matched);
3469 CFS_LIST_HEAD(cancels);
3470 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3471 &RQF_LDLM_ENQUEUE_LVB);
3475 rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
3477 ptlrpc_request_free(req);
3481 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
3483 ptlrpc_request_set_replen(req);
3486 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
3487 *flags &= ~LDLM_FL_BLOCK_GRANTED;
3489 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
3490 sizeof(*lvb), lockh, async);
3493 struct osc_enqueue_args *aa;
3494 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3495 aa = ptlrpc_req_async_args(req);
3498 aa->oa_flags = flags;
3499 aa->oa_upcall = upcall;
3500 aa->oa_cookie = cookie;
3502 aa->oa_lockh = lockh;
3505 req->rq_interpret_reply =
3506 (ptlrpc_interpterer_t)osc_enqueue_interpret;
3507 if (rqset == PTLRPCD_SET)
3508 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
3510 ptlrpc_set_add_req(rqset, req);
3511 } else if (intent) {
3512 ptlrpc_req_finished(req);
3517 rc = osc_enqueue_fini(req, lvb, upcall, cookie, flags, agl, rc);
3519 ptlrpc_req_finished(req);
3524 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
3525 struct ldlm_enqueue_info *einfo,
3526 struct ptlrpc_request_set *rqset)
3528 struct ldlm_res_id res_id;
3532 osc_build_res_name(oinfo->oi_md->lsm_object_id,
3533 oinfo->oi_md->lsm_object_seq, &res_id);
3535 rc = osc_enqueue_base(exp, &res_id, &oinfo->oi_flags, &oinfo->oi_policy,
3536 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
3537 oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid,
3538 oinfo->oi_cb_up, oinfo, einfo, oinfo->oi_lockh,
3539 rqset, rqset != NULL, 0);
3543 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3544 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3545 int *flags, void *data, struct lustre_handle *lockh,
3548 struct obd_device *obd = exp->exp_obd;
3549 int lflags = *flags;
3553 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
3556 /* Filesystem lock extents are extended to page boundaries so that
3557 * dealing with the page cache is a little smoother */
3558 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3559 policy->l_extent.end |= ~CFS_PAGE_MASK;
3561 /* Next, search for already existing extent locks that will cover us */
3562 /* If we're trying to read, we also search for an existing PW lock. The
3563 * VFS and page cache already protect us locally, so lots of readers/
3564 * writers can share a single PW lock. */
3568 rc = ldlm_lock_match(obd->obd_namespace, lflags,
3569 res_id, type, policy, rc, lockh, unref);
3572 if (!osc_set_data_with_check(lockh, data)) {
3573 if (!(lflags & LDLM_FL_TEST_LOCK))
3574 ldlm_lock_decref(lockh, rc);
3578 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3579 ldlm_lock_addref(lockh, LCK_PR);
3580 ldlm_lock_decref(lockh, LCK_PW);
3587 int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
3591 if (unlikely(mode == LCK_GROUP))
3592 ldlm_lock_decref_and_cancel(lockh, mode);
3594 ldlm_lock_decref(lockh, mode);
3599 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3600 __u32 mode, struct lustre_handle *lockh)
3603 RETURN(osc_cancel_base(lockh, mode));
3606 static int osc_cancel_unused(struct obd_export *exp,
3607 struct lov_stripe_md *lsm,
3608 ldlm_cancel_flags_t flags,
3611 struct obd_device *obd = class_exp2obd(exp);
3612 struct ldlm_res_id res_id, *resp = NULL;
3615 resp = osc_build_res_name(lsm->lsm_object_id,
3616 lsm->lsm_object_seq, &res_id);
3619 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3622 static int osc_statfs_interpret(const struct lu_env *env,
3623 struct ptlrpc_request *req,
3624 struct osc_async_args *aa, int rc)
3626 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
3627 struct obd_statfs *msfs;
3632 /* The request has in fact never been sent
3633 * due to issues at a higher level (LOV).
3634 * Exit immediately since the caller is
3635 * aware of the problem and takes care
3636 * of the clean up */
3639 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
3640 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
3646 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3648 GOTO(out, rc = -EPROTO);
3651 /* Reinitialize the RDONLY and DEGRADED flags at the client
3652 * on each statfs, so they don't stay set permanently. */
3653 cfs_spin_lock(&cli->cl_oscc.oscc_lock);
3655 if (unlikely(msfs->os_state & OS_STATE_DEGRADED))
3656 cli->cl_oscc.oscc_flags |= OSCC_FLAG_DEGRADED;
3657 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_DEGRADED))
3658 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_DEGRADED;
3660 if (unlikely(msfs->os_state & OS_STATE_READONLY))
3661 cli->cl_oscc.oscc_flags |= OSCC_FLAG_RDONLY;
3662 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_RDONLY))
3663 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_RDONLY;
3665 /* Add a bit of hysteresis so this flag isn't continually flapping,
3666 * and ensure that new files don't get extremely fragmented due to
3667 * only a small amount of available space in the filesystem.
3668 * We want to set the NOSPC flag when there is less than ~0.1% free
3669 * and clear it when there is at least ~0.2% free space, so:
3670 * avail < ~0.1% max max = avail + used
3671 * 1025 * avail < avail + used used = blocks - free
3672 * 1024 * avail < used
3673 * 1024 * avail < blocks - free
3674 * avail < ((blocks - free) >> 10)
3676 * On very large disk, say 16TB 0.1% will be 16 GB. We don't want to
3677 * lose that amount of space so in those cases we report no space left
3678 * if their is less than 1 GB left. */
3679 used = min_t(__u64,(msfs->os_blocks - msfs->os_bfree) >> 10, 1 << 30);
3680 if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) == 0) &&
3681 ((msfs->os_ffree < 32) || (msfs->os_bavail < used))))
3682 cli->cl_oscc.oscc_flags |= OSCC_FLAG_NOSPC;
3683 else if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) != 0) &&
3684 (msfs->os_ffree > 64) &&
3685 (msfs->os_bavail > (used << 1)))) {
3686 cli->cl_oscc.oscc_flags &= ~(OSCC_FLAG_NOSPC |
3687 OSCC_FLAG_NOSPC_BLK);
3690 if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) != 0) &&
3691 (msfs->os_bavail < used)))
3692 cli->cl_oscc.oscc_flags |= OSCC_FLAG_NOSPC_BLK;
3694 cfs_spin_unlock(&cli->cl_oscc.oscc_lock);
3696 *aa->aa_oi->oi_osfs = *msfs;
3698 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3702 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3703 __u64 max_age, struct ptlrpc_request_set *rqset)
3705 struct ptlrpc_request *req;
3706 struct osc_async_args *aa;
3710 /* We could possibly pass max_age in the request (as an absolute
3711 * timestamp or a "seconds.usec ago") so the target can avoid doing
3712 * extra calls into the filesystem if that isn't necessary (e.g.
3713 * during mount that would help a bit). Having relative timestamps
3714 * is not so great if request processing is slow, while absolute
3715 * timestamps are not ideal because they need time synchronization. */
3716 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3720 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3722 ptlrpc_request_free(req);
3725 ptlrpc_request_set_replen(req);
3726 req->rq_request_portal = OST_CREATE_PORTAL;
3727 ptlrpc_at_set_req_timeout(req);
3729 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3730 /* procfs requests not want stat in wait for avoid deadlock */
3731 req->rq_no_resend = 1;
3732 req->rq_no_delay = 1;
3735 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
3736 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3737 aa = ptlrpc_req_async_args(req);
3740 ptlrpc_set_add_req(rqset, req);
3744 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3745 __u64 max_age, __u32 flags)
3747 struct obd_statfs *msfs;
3748 struct ptlrpc_request *req;
3749 struct obd_import *imp = NULL;
3753 /*Since the request might also come from lprocfs, so we need
3754 *sync this with client_disconnect_export Bug15684*/
3755 cfs_down_read(&obd->u.cli.cl_sem);
3756 if (obd->u.cli.cl_import)
3757 imp = class_import_get(obd->u.cli.cl_import);
3758 cfs_up_read(&obd->u.cli.cl_sem);
3762 /* We could possibly pass max_age in the request (as an absolute
3763 * timestamp or a "seconds.usec ago") so the target can avoid doing
3764 * extra calls into the filesystem if that isn't necessary (e.g.
3765 * during mount that would help a bit). Having relative timestamps
3766 * is not so great if request processing is slow, while absolute
3767 * timestamps are not ideal because they need time synchronization. */
3768 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
3770 class_import_put(imp);
3775 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3777 ptlrpc_request_free(req);
3780 ptlrpc_request_set_replen(req);
3781 req->rq_request_portal = OST_CREATE_PORTAL;
3782 ptlrpc_at_set_req_timeout(req);
3784 if (flags & OBD_STATFS_NODELAY) {
3785 /* procfs requests not want stat in wait for avoid deadlock */
3786 req->rq_no_resend = 1;
3787 req->rq_no_delay = 1;
3790 rc = ptlrpc_queue_wait(req);
3794 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3796 GOTO(out, rc = -EPROTO);
3803 ptlrpc_req_finished(req);
3807 /* Retrieve object striping information.
3809 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3810 * the maximum number of OST indices which will fit in the user buffer.
3811 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3813 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3815 /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
3816 struct lov_user_md_v3 lum, *lumk;
3817 struct lov_user_ost_data_v1 *lmm_objects;
3818 int rc = 0, lum_size;
3824 /* we only need the header part from user space to get lmm_magic and
3825 * lmm_stripe_count, (the header part is common to v1 and v3) */
3826 lum_size = sizeof(struct lov_user_md_v1);
3827 if (cfs_copy_from_user(&lum, lump, lum_size))
3830 if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
3831 (lum.lmm_magic != LOV_USER_MAGIC_V3))
3834 /* lov_user_md_vX and lov_mds_md_vX must have the same size */
3835 LASSERT(sizeof(struct lov_user_md_v1) == sizeof(struct lov_mds_md_v1));
3836 LASSERT(sizeof(struct lov_user_md_v3) == sizeof(struct lov_mds_md_v3));
3837 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
3839 /* we can use lov_mds_md_size() to compute lum_size
3840 * because lov_user_md_vX and lov_mds_md_vX have the same size */
3841 if (lum.lmm_stripe_count > 0) {
3842 lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
3843 OBD_ALLOC(lumk, lum_size);
3847 if (lum.lmm_magic == LOV_USER_MAGIC_V1)
3848 lmm_objects = &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
3850 lmm_objects = &(lumk->lmm_objects[0]);
3851 lmm_objects->l_object_id = lsm->lsm_object_id;
3853 lum_size = lov_mds_md_size(0, lum.lmm_magic);
3857 lumk->lmm_object_id = lsm->lsm_object_id;
3858 lumk->lmm_object_seq = lsm->lsm_object_seq;
3859 lumk->lmm_stripe_count = 1;
3861 if (cfs_copy_to_user(lump, lumk, lum_size))
3865 OBD_FREE(lumk, lum_size);
3871 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3872 void *karg, void *uarg)
3874 struct obd_device *obd = exp->exp_obd;
3875 struct obd_ioctl_data *data = karg;
3879 if (!cfs_try_module_get(THIS_MODULE)) {
3880 CERROR("Can't get module. Is it alive?");
3884 case OBD_IOC_LOV_GET_CONFIG: {
3886 struct lov_desc *desc;
3887 struct obd_uuid uuid;
3891 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3892 GOTO(out, err = -EINVAL);
3894 data = (struct obd_ioctl_data *)buf;
3896 if (sizeof(*desc) > data->ioc_inllen1) {
3897 obd_ioctl_freedata(buf, len);
3898 GOTO(out, err = -EINVAL);
3901 if (data->ioc_inllen2 < sizeof(uuid)) {
3902 obd_ioctl_freedata(buf, len);
3903 GOTO(out, err = -EINVAL);
3906 desc = (struct lov_desc *)data->ioc_inlbuf1;
3907 desc->ld_tgt_count = 1;
3908 desc->ld_active_tgt_count = 1;
3909 desc->ld_default_stripe_count = 1;
3910 desc->ld_default_stripe_size = 0;
3911 desc->ld_default_stripe_offset = 0;
3912 desc->ld_pattern = 0;
3913 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3915 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3917 err = cfs_copy_to_user((void *)uarg, buf, len);
3920 obd_ioctl_freedata(buf, len);
3923 case LL_IOC_LOV_SETSTRIPE:
3924 err = obd_alloc_memmd(exp, karg);
3928 case LL_IOC_LOV_GETSTRIPE:
3929 err = osc_getstripe(karg, uarg);
3931 case OBD_IOC_CLIENT_RECOVER:
3932 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3933 data->ioc_inlbuf1, 0);
3937 case IOC_OSC_SET_ACTIVE:
3938 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3941 case OBD_IOC_POLL_QUOTACHECK:
3942 err = osc_quota_poll_check(exp, (struct if_quotacheck *)karg);
3944 case OBD_IOC_PING_TARGET:
3945 err = ptlrpc_obd_ping(obd);
3948 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3949 cmd, cfs_curproc_comm());
3950 GOTO(out, err = -ENOTTY);
3953 cfs_module_put(THIS_MODULE);
3957 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3958 void *key, __u32 *vallen, void *val,
3959 struct lov_stripe_md *lsm)
3962 if (!vallen || !val)
3965 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
3966 __u32 *stripe = val;
3967 *vallen = sizeof(*stripe);
3970 } else if (KEY_IS(KEY_LAST_ID)) {
3971 struct ptlrpc_request *req;
3976 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3977 &RQF_OST_GET_INFO_LAST_ID);
3981 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3982 RCL_CLIENT, keylen);
3983 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3985 ptlrpc_request_free(req);
3989 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3990 memcpy(tmp, key, keylen);
3992 req->rq_no_delay = req->rq_no_resend = 1;
3993 ptlrpc_request_set_replen(req);
3994 rc = ptlrpc_queue_wait(req);
3998 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
4000 GOTO(out, rc = -EPROTO);
4002 *((obd_id *)val) = *reply;
4004 ptlrpc_req_finished(req);
4006 } else if (KEY_IS(KEY_FIEMAP)) {
4007 struct ptlrpc_request *req;
4008 struct ll_user_fiemap *reply;
4012 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
4013 &RQF_OST_GET_INFO_FIEMAP);
4017 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
4018 RCL_CLIENT, keylen);
4019 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
4020 RCL_CLIENT, *vallen);
4021 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
4022 RCL_SERVER, *vallen);
4024 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
4026 ptlrpc_request_free(req);
4030 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
4031 memcpy(tmp, key, keylen);
4032 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
4033 memcpy(tmp, val, *vallen);
4035 ptlrpc_request_set_replen(req);
4036 rc = ptlrpc_queue_wait(req);
4040 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
4042 GOTO(out1, rc = -EPROTO);
4044 memcpy(val, reply, *vallen);
4046 ptlrpc_req_finished(req);
4054 static int osc_setinfo_mds_connect_import(struct obd_import *imp)
4056 struct llog_ctxt *ctxt;
4060 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
4062 rc = llog_initiator_connect(ctxt);
4063 llog_ctxt_put(ctxt);
4065 /* XXX return an error? skip setting below flags? */
4068 cfs_spin_lock(&imp->imp_lock);
4069 imp->imp_server_timeout = 1;
4070 imp->imp_pingable = 1;
4071 cfs_spin_unlock(&imp->imp_lock);
4072 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
4077 static int osc_setinfo_mds_conn_interpret(const struct lu_env *env,
4078 struct ptlrpc_request *req,
4085 RETURN(osc_setinfo_mds_connect_import(req->rq_import));
4088 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
4089 void *key, obd_count vallen, void *val,
4090 struct ptlrpc_request_set *set)
4092 struct ptlrpc_request *req;
4093 struct obd_device *obd = exp->exp_obd;
4094 struct obd_import *imp = class_exp2cliimp(exp);
4099 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
4101 if (KEY_IS(KEY_NEXT_ID)) {
4103 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4105 if (vallen != sizeof(obd_id))
4110 if (vallen != sizeof(obd_id))
4113 /* avoid race between allocate new object and set next id
4114 * from ll_sync thread */
4115 cfs_spin_lock(&oscc->oscc_lock);
4116 new_val = *((obd_id*)val) + 1;
4117 if (new_val > oscc->oscc_next_id)
4118 oscc->oscc_next_id = new_val;
4119 cfs_spin_unlock(&oscc->oscc_lock);
4120 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
4121 exp->exp_obd->obd_name,
4122 obd->u.cli.cl_oscc.oscc_next_id);
4127 if (KEY_IS(KEY_CHECKSUM)) {
4128 if (vallen != sizeof(int))
4130 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
4134 if (KEY_IS(KEY_SPTLRPC_CONF)) {
4135 sptlrpc_conf_client_adapt(obd);
4139 if (KEY_IS(KEY_FLUSH_CTX)) {
4140 sptlrpc_import_flush_my_ctx(imp);
4144 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
4147 /* We pass all other commands directly to OST. Since nobody calls osc
4148 methods directly and everybody is supposed to go through LOV, we
4149 assume lov checked invalid values for us.
4150 The only recognised values so far are evict_by_nid and mds_conn.
4151 Even if something bad goes through, we'd get a -EINVAL from OST
4154 if (KEY_IS(KEY_GRANT_SHRINK))
4155 req = ptlrpc_request_alloc(imp, &RQF_OST_SET_GRANT_INFO);
4157 req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
4162 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
4163 RCL_CLIENT, keylen);
4164 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
4165 RCL_CLIENT, vallen);
4166 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
4168 ptlrpc_request_free(req);
4172 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
4173 memcpy(tmp, key, keylen);
4174 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
4175 memcpy(tmp, val, vallen);
4177 if (KEY_IS(KEY_MDS_CONN)) {
4178 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4180 oscc->oscc_oa.o_seq = (*(__u32 *)val);
4181 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
4182 LASSERT_SEQ_IS_MDT(oscc->oscc_oa.o_seq);
4183 req->rq_no_delay = req->rq_no_resend = 1;
4184 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
4185 } else if (KEY_IS(KEY_GRANT_SHRINK)) {
4186 struct osc_grant_args *aa;
4189 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
4190 aa = ptlrpc_req_async_args(req);
4193 ptlrpc_req_finished(req);
4196 *oa = ((struct ost_body *)val)->oa;
4198 req->rq_interpret_reply = osc_shrink_grant_interpret;
4201 ptlrpc_request_set_replen(req);
4202 if (!KEY_IS(KEY_GRANT_SHRINK)) {
4203 LASSERT(set != NULL);
4204 ptlrpc_set_add_req(set, req);
4205 ptlrpc_check_set(NULL, set);
4207 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
4213 static struct llog_operations osc_size_repl_logops = {
4214 lop_cancel: llog_obd_repl_cancel
4217 static struct llog_operations osc_mds_ost_orig_logops;
4219 static int __osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4220 struct obd_device *tgt, struct llog_catid *catid)
4225 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, tgt, 1,
4226 &catid->lci_logid, &osc_mds_ost_orig_logops);
4228 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
4232 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, tgt, 1,
4233 NULL, &osc_size_repl_logops);
4235 struct llog_ctxt *ctxt =
4236 llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4239 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
4244 CERROR("osc '%s' tgt '%s' catid %p rc=%d\n",
4245 obd->obd_name, tgt->obd_name, catid, rc);
4246 CERROR("logid "LPX64":0x%x\n",
4247 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
4252 static int osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4253 struct obd_device *disk_obd, int *index)
4255 struct llog_catid catid;
4256 static char name[32] = CATLIST;
4260 LASSERT(olg == &obd->obd_olg);
4262 cfs_mutex_lock(&olg->olg_cat_processing);
4263 rc = llog_get_cat_list(disk_obd, name, *index, 1, &catid);
4265 CERROR("rc: %d\n", rc);
4269 CDEBUG(D_INFO, "%s: Init llog for %d - catid "LPX64"/"LPX64":%x\n",
4270 obd->obd_name, *index, catid.lci_logid.lgl_oid,
4271 catid.lci_logid.lgl_oseq, catid.lci_logid.lgl_ogen);
4273 rc = __osc_llog_init(obd, olg, disk_obd, &catid);
4275 CERROR("rc: %d\n", rc);
4279 rc = llog_put_cat_list(disk_obd, name, *index, 1, &catid);
4281 CERROR("rc: %d\n", rc);
4286 cfs_mutex_unlock(&olg->olg_cat_processing);
4291 static int osc_llog_finish(struct obd_device *obd, int count)
4293 struct llog_ctxt *ctxt;
4294 int rc = 0, rc2 = 0;
4297 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4299 rc = llog_cleanup(ctxt);
4301 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4303 rc2 = llog_cleanup(ctxt);
4310 static int osc_reconnect(const struct lu_env *env,
4311 struct obd_export *exp, struct obd_device *obd,
4312 struct obd_uuid *cluuid,
4313 struct obd_connect_data *data,
4316 struct client_obd *cli = &obd->u.cli;
4318 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
4321 client_obd_list_lock(&cli->cl_loi_list_lock);
4322 data->ocd_grant = (cli->cl_avail_grant + cli->cl_dirty) ?:
4323 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
4324 lost_grant = cli->cl_lost_grant;
4325 cli->cl_lost_grant = 0;
4326 client_obd_list_unlock(&cli->cl_loi_list_lock);
4328 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
4329 "cl_dirty: %ld cl_lost_grant: %ld\n", data->ocd_grant,
4330 cli->cl_avail_grant, cli->cl_dirty, lost_grant);
4331 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
4332 " ocd_grant: %d\n", data->ocd_connect_flags,
4333 data->ocd_version, data->ocd_grant);
4339 static int osc_disconnect(struct obd_export *exp)
4341 struct obd_device *obd = class_exp2obd(exp);
4342 struct llog_ctxt *ctxt;
4345 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4347 if (obd->u.cli.cl_conn_count == 1) {
4348 /* Flush any remaining cancel messages out to the
4350 llog_sync(ctxt, exp);
4352 llog_ctxt_put(ctxt);
4354 CDEBUG(D_HA, "No LLOG_SIZE_REPL_CTXT found in obd %p\n",
4358 rc = client_disconnect_export(exp);
4360 * Initially we put del_shrink_grant before disconnect_export, but it
4361 * causes the following problem if setup (connect) and cleanup
4362 * (disconnect) are tangled together.
4363 * connect p1 disconnect p2
4364 * ptlrpc_connect_import
4365 * ............... class_manual_cleanup
4368 * ptlrpc_connect_interrupt
4370 * add this client to shrink list
4372 * Bang! pinger trigger the shrink.
4373 * So the osc should be disconnected from the shrink list, after we
4374 * are sure the import has been destroyed. BUG18662
4376 if (obd->u.cli.cl_import == NULL)
4377 osc_del_shrink_grant(&obd->u.cli);
4381 static int osc_import_event(struct obd_device *obd,
4382 struct obd_import *imp,
4383 enum obd_import_event event)
4385 struct client_obd *cli;
4389 LASSERT(imp->imp_obd == obd);
4392 case IMP_EVENT_DISCON: {
4393 /* Only do this on the MDS OSC's */
4394 if (imp->imp_server_timeout) {
4395 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4397 cfs_spin_lock(&oscc->oscc_lock);
4398 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
4399 cfs_spin_unlock(&oscc->oscc_lock);
4402 client_obd_list_lock(&cli->cl_loi_list_lock);
4403 cli->cl_avail_grant = 0;
4404 cli->cl_lost_grant = 0;
4405 client_obd_list_unlock(&cli->cl_loi_list_lock);
4408 case IMP_EVENT_INACTIVE: {
4409 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
4412 case IMP_EVENT_INVALIDATE: {
4413 struct ldlm_namespace *ns = obd->obd_namespace;
4417 env = cl_env_get(&refcheck);
4421 client_obd_list_lock(&cli->cl_loi_list_lock);
4422 /* all pages go to failing rpcs due to the invalid
4424 osc_check_rpcs(env, cli);
4425 client_obd_list_unlock(&cli->cl_loi_list_lock);
4427 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
4428 cl_env_put(env, &refcheck);
4433 case IMP_EVENT_ACTIVE: {
4434 /* Only do this on the MDS OSC's */
4435 if (imp->imp_server_timeout) {
4436 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4438 cfs_spin_lock(&oscc->oscc_lock);
4439 oscc->oscc_flags &= ~(OSCC_FLAG_NOSPC |
4440 OSCC_FLAG_NOSPC_BLK);
4441 cfs_spin_unlock(&oscc->oscc_lock);
4443 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
4446 case IMP_EVENT_OCD: {
4447 struct obd_connect_data *ocd = &imp->imp_connect_data;
4449 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
4450 osc_init_grant(&obd->u.cli, ocd);
4453 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
4454 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
4456 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
4459 case IMP_EVENT_DEACTIVATE: {
4460 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE, NULL);
4463 case IMP_EVENT_ACTIVATE: {
4464 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE, NULL);
4468 CERROR("Unknown import event %d\n", event);
4475 * Determine whether the lock can be canceled before replaying the lock
4476 * during recovery, see bug16774 for detailed information.
4478 * \retval zero the lock can't be canceled
4479 * \retval other ok to cancel
4481 static int osc_cancel_for_recovery(struct ldlm_lock *lock)
4483 check_res_locked(lock->l_resource);
4486 * Cancel all unused extent lock in granted mode LCK_PR or LCK_CR.
4488 * XXX as a future improvement, we can also cancel unused write lock
4489 * if it doesn't have dirty data and active mmaps.
4491 if (lock->l_resource->lr_type == LDLM_EXTENT &&
4492 (lock->l_granted_mode == LCK_PR ||
4493 lock->l_granted_mode == LCK_CR) &&
4494 (osc_dlm_lock_pageref(lock) == 0))
4500 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
4502 struct client_obd *cli = &obd->u.cli;
4507 rc = ptlrpcd_addref();
4511 rc = client_obd_setup(obd, lcfg);
4514 handler = ptlrpcd_alloc_work(cli->cl_import,
4515 brw_queue_work, cli);
4516 if (!IS_ERR(handler))
4517 cli->cl_writeback_work = handler;
4519 rc = PTR_ERR(handler);
4523 struct lprocfs_static_vars lvars = { 0 };
4525 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
4526 lprocfs_osc_init_vars(&lvars);
4527 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
4528 lproc_osc_attach_seqstat(obd);
4529 sptlrpc_lprocfs_cliobd_attach(obd);
4530 ptlrpc_lprocfs_register_obd(obd);
4534 /* We need to allocate a few requests more, because
4535 brw_interpret tries to create new requests before freeing
4536 previous ones. Ideally we want to have 2x max_rpcs_in_flight
4537 reserved, but I afraid that might be too much wasted RAM
4538 in fact, so 2 is just my guess and still should work. */
4539 cli->cl_import->imp_rq_pool =
4540 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
4542 ptlrpc_add_rqs_to_pool);
4544 CFS_INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
4546 ns_register_cancel(obd->obd_namespace, osc_cancel_for_recovery);
4554 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
4560 case OBD_CLEANUP_EARLY: {
4561 struct obd_import *imp;
4562 imp = obd->u.cli.cl_import;
4563 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
4564 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
4565 ptlrpc_deactivate_import(imp);
4566 cfs_spin_lock(&imp->imp_lock);
4567 imp->imp_pingable = 0;
4568 cfs_spin_unlock(&imp->imp_lock);
4571 case OBD_CLEANUP_EXPORTS: {
4572 struct client_obd *cli = &obd->u.cli;
4574 * for echo client, export may be on zombie list, wait for
4575 * zombie thread to cull it, because cli.cl_import will be
4576 * cleared in client_disconnect_export():
4577 * class_export_destroy() -> obd_cleanup() ->
4578 * echo_device_free() -> echo_client_cleanup() ->
4579 * obd_disconnect() -> osc_disconnect() ->
4580 * client_disconnect_export()
4582 obd_zombie_barrier();
4583 if (cli->cl_writeback_work) {
4584 ptlrpcd_destroy_work(cli->cl_writeback_work);
4585 cli->cl_writeback_work = NULL;
4587 obd_cleanup_client_import(obd);
4588 ptlrpc_lprocfs_unregister_obd(obd);
4589 lprocfs_obd_cleanup(obd);
4590 rc = obd_llog_finish(obd, 0);
4592 CERROR("failed to cleanup llogging subsystems\n");
4599 int osc_cleanup(struct obd_device *obd)
4605 /* free memory of osc quota cache */
4606 osc_quota_cleanup(obd);
4608 rc = client_obd_cleanup(obd);
4614 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
4616 struct lprocfs_static_vars lvars = { 0 };
4619 lprocfs_osc_init_vars(&lvars);
4621 switch (lcfg->lcfg_command) {
4623 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
4633 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
4635 return osc_process_config_base(obd, buf);
4638 struct obd_ops osc_obd_ops = {
4639 .o_owner = THIS_MODULE,
4640 .o_setup = osc_setup,
4641 .o_precleanup = osc_precleanup,
4642 .o_cleanup = osc_cleanup,
4643 .o_add_conn = client_import_add_conn,
4644 .o_del_conn = client_import_del_conn,
4645 .o_connect = client_connect_import,
4646 .o_reconnect = osc_reconnect,
4647 .o_disconnect = osc_disconnect,
4648 .o_statfs = osc_statfs,
4649 .o_statfs_async = osc_statfs_async,
4650 .o_packmd = osc_packmd,
4651 .o_unpackmd = osc_unpackmd,
4652 .o_precreate = osc_precreate,
4653 .o_create = osc_create,
4654 .o_create_async = osc_create_async,
4655 .o_destroy = osc_destroy,
4656 .o_getattr = osc_getattr,
4657 .o_getattr_async = osc_getattr_async,
4658 .o_setattr = osc_setattr,
4659 .o_setattr_async = osc_setattr_async,
4661 .o_punch = osc_punch,
4663 .o_enqueue = osc_enqueue,
4664 .o_change_cbdata = osc_change_cbdata,
4665 .o_find_cbdata = osc_find_cbdata,
4666 .o_cancel = osc_cancel,
4667 .o_cancel_unused = osc_cancel_unused,
4668 .o_iocontrol = osc_iocontrol,
4669 .o_get_info = osc_get_info,
4670 .o_set_info_async = osc_set_info_async,
4671 .o_import_event = osc_import_event,
4672 .o_llog_init = osc_llog_init,
4673 .o_llog_finish = osc_llog_finish,
4674 .o_process_config = osc_process_config,
4675 .o_quotactl = osc_quotactl,
4676 .o_quotacheck = osc_quotacheck,
4677 .o_quota_adjust_qunit = osc_quota_adjust_qunit,
4680 extern struct lu_kmem_descr osc_caches[];
4681 extern cfs_spinlock_t osc_ast_guard;
4682 extern cfs_lock_class_key_t osc_ast_guard_class;
4684 int __init osc_init(void)
4686 struct lprocfs_static_vars lvars = { 0 };
4690 /* print an address of _any_ initialized kernel symbol from this
4691 * module, to allow debugging with gdb that doesn't support data
4692 * symbols from modules.*/
4693 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
4695 rc = lu_kmem_init(osc_caches);
4697 lprocfs_osc_init_vars(&lvars);
4700 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
4701 LUSTRE_OSC_NAME, &osc_device_type);
4703 lu_kmem_fini(osc_caches);
4707 cfs_spin_lock_init(&osc_ast_guard);
4708 cfs_lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
4710 osc_mds_ost_orig_logops = llog_lvfs_ops;
4711 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
4712 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
4713 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
4714 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
4720 static void /*__exit*/ osc_exit(void)
4722 lu_device_type_fini(&osc_device_type);
4725 class_unregister_type(LUSTRE_OSC_NAME);
4726 lu_kmem_fini(osc_caches);
4729 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
4730 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
4731 MODULE_LICENSE("GPL");
4733 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);
git://git.whamcloud.com / fs / lustre-release.git / blob